Publications

Published Book

  1. G. B. Giannakis, Z. Liu, X. Ma, and S. Zhou, Space-Time Coding for Broadband Wireless Communications, New York: John Wiley & Sons, Inc., 2007.

Published Parts of Books

  1. X. Ma and G. B. Giannakis, “Space-time coding for time-selective and frequency-selective MIMO channels,” in H. Bolcskei, D. Gesbert, C. Papadias, and A. J. van der Veen, editors, ‘’ Space-Time Wireless Systems: From Array Processing to MIMO Communications, Cambridge University Press, 2006, pp. 218–238.
  2. W. Zhang and X. Ma, “Lattice reduction aided equalization for wireless applications,” in V. K. Madisetti and D. Williams, editors, The Digital Signal Processing Handbook, CRC Press, Boca Raton, FL, 2009.
  3. X. Ma and Q. Zhou, “Massive MIMO and Its Detection,” MIMO Processing for 4G and Beyond: Fundamentals and Evolution, CRC Press / Taylor and Francis Group, 2014

Refereed Journal Publications

  1. X. Ma and G. Tao, “Adaptive actuator compensation control with feedback linearization,” IEEE Trans. Automatic Control, vol. 45, no. 9, pp. 1705–1710, Sep. 2000.
  2. G. Tao, S. M. Joshi, and X. Ma, “Adaptive state feedback and tracking control of systems with actuator failures,” IEEE Trans. Automatic Control, vol. 46, no. 1, pp. 78–95, Jan. 2001.
  3. G. Tao, X. Ma, and Y. Ling, “Optimal nonlinear decoupling control of systems with sandwiched backlash,” Automatica, vol. 37, no. 2, pp. 165–176, Feb. 2001.
  4. X. Ma, C. Tepedelenlioglu, G. B. Giannakis, and S. Barbarossa, “Non-data aided carrier-offset estimators for OFDM with null sub-carriers: identifiability, algorithms, and performance,” IEEE Journal on Selected Areas in Communications, vol. 19, no. 12, pp. 2504–2515, Dec. 2001.
  5. Z. Liu, X. Ma, and G. B. Giannakis, “Space-time coding and Kalman filtering for time-selective fading channels,” IEEE Trans. Communications, vol. 50, no. 2, pp. 183–186, Feb. 2002.
  6. X. Ma and G. B. Giannakis, “Complex field coded MIMO systems: performance, rate, and tradeoffs,” Wireless Communications and Mobile Computing, vol. 2, no. 7, pp. 693–717, Nov. 2002.
  7. X. Ma, G. B. Giannakis, and S. Ohno, “Optimal training for block transmissions over doubly-selective wireless fading channels,” IEEE Trans. Signal Processing, vol. 51, no. 5, pp. 1351–1366, May 2003.
  8. X. Ma and G. B. Giannakis, “Maximum diversity transmissions over doubly-selective wireless channels,” IEEE Trans. Information Theory, vol. 49, no. 7, pp. 1832–1840, Jul. 2003.
  9. X. Ma and G. B. Giannakis, “Full-diversity full-rate complex-field space-time coding,” IEEE Trans. Signal Processing, vol. 51, no. 11, pp. 2917–2930, Nov. 2003.
  10. Z. Wang, X. Ma, and G. B. Giannakis, “OFDM or single-carrier zero-padded block transmissions?,” IEEE Trans. Communications, vol. 52, no. 3, pp. 380–394, Mar. 2004.
  11. X. Ma, G. B. Giannakis, and B. Lu, “Block differential encoding for rapidly fading channels,” IEEE Trans. Communications, vol. 52, no. 3, pp. 416–425, Mar. 2004.
  12. R. Wang, X. Ma, and G. B. Giannakis, “Improving the performance of coded FDFR multi-antenna systems with turbo-decoding,” Wireless Communications and Mobile Computing, vol. 4, no. 7, pp. 711– 725, Nov. 2004.
  13. X. Ma, M.-K. Oh, G. B. Giannakis, and D.-J. Park, “Hopping pilots for estimation of frequency offsets and multiantenna channels in MIMO-OFDM,” IEEE Trans. Communications, vol. 53, no. 1, pp. 162–172, Jan. 2005.
  14. X. Ma, L. Yang, and G. B. Giannakis, “Optimal training for MIMO frequency-selective fading channels,” IEEE Trans. Wireless Communications, vol. 4, no. 2, pp. 453–466, Mar. 2005.
  15. X. Ma and G. B. Giannakis, “Space-time-multipath coding using digital phase sweeping or circular delay diversity,” IEEE Trans. Signal Processing, vol. 53, no. 3, pp. 1121–1131, Mar. 2005.
  16. X. Ma, G. Leus, and G. B. Giannakis, “Space-time-doppler coding for correlated time selective fading channels,” IEEE Trans. Signal Processing, vol. 53, no. 6, pp. 2167–2181, Jun. 2005.
  17. M.-K. Oh, X. Ma, G. B. Giannakis, and D.-J. Park, “Cooperative synchronization and channel estimation in wireless sensor networks,” Journal on Communications and Networks, vol. 7, no. 3, pp. 284–293, Sep. 2005.
  18. X. Ma, “Low-complexity block double differential design for OFDM with carrier frequency offset,” IEEE Trans. Communications, vol. 53, no. 12, pp. 2129–2138, Dec. 2005.
  19. A. Cano, X. Ma, and G. B. Giannakis, “Block-differential modulation for doubly-selective wireless fading channels,” IEEE Trans. Communications, vol. 53, no. 12, pp. 2157–2166, Dec. 2005.
  20. S. Zhou, X. Ma, and K. Pattipati, “A view on full-diversity modulus-preserving rate-one linear spacetime block codes,” Signal Processing, vol. 86, no. 8, pp. 1968–1975, Aug. 2006.
  21. X. Liu, J. Li, and X. Ma, “An EM algorithm for blind hop timing estimation of multiple frequency hopped signals with bandwidth mismatch,” IEEE Trans. Vehicular Technology, vol. 56, no. 5, pp. 2545–2554, Sept. 2007.
  22. J. Liu, X. Liu, and X. Ma, “Multidimensional frequency estimation from finite snapshots in the presence of identical frequencies,” IEEE Trans. Signal Processing, vol. 55, no. 11, pp. 5179–5194, Nov. 2007.
  23. X. Ma and W. Zhang, “Performance analysis for MIMO systems with lattice-reduction aided linear equalization,” IEEE Trans. Communications, vol. 56, no. 2, pp. 309–318, Feb. 2008.
  24. G. Zhao, X. Liu, M.-T. Sun, and X. Ma, “Energy efficient geographic routing with virtual anchors based on projection distance,” Computer Communications, vol. 31, no. 10, pp. 2195–2204, Jun. 2008.
  25. J. Liu, X. Liu, and X. Ma, “First-order perturbation analysis of singular vectors in singular value decomposition,” IEEE Trans. Signal Processing, vol. 56, no. 7, pp. 3044–3049, Jul. 2008.
  26. X. Ma, M. T. Sun, G. Zhao, and X. Liu, “Improving geographical routing for wireless networks with an efficient path pruning algorithm,” IEEE Trans. Vehicular Technology, vol. 57, no. 4, pp. 2474–2488, Jul. 2008.
  27. X. Liu, G. Zhao, and X. Ma, “Target localization and tracking in noisy binary sensor networks with known spatial topology,” Wireless Communications and Mobile Computing, vol. 9, no. 8, pp. 1028–1039, Jul. 2008.
  28. X. Ma and W. Zhang, “Fundamental limits of linear equalizers: diversity, capacity and complexity,” IEEE Trans. Information Theory, vol. 54, no. 8, pp. 3442–3456, Aug. 2008.
  29. W. Zhang, F. Arnold, and X. Ma, “An analysis of Seysen’s lattice reduction algorithm,” Signal Processing, vol. 88, no. 10, pp. 2573–2577, Oct. 2008.
  30. K. Shi, X. Ma, and G. T. Zhou, “Nonlinear acoustic echo cancellation using a pseudo-coherence function,” IEEE Trans. Circuits and Systems – I: Regular Papers, vol. 55, no. 9, pp. 2639–2649, Oct. 2008.
  31. W. Zhang, X. Ma, B. Gestner, and D. V. Anderson, “Designing low-complexity equalizers for wireless systems,” IEEE Communications Magazine, vol. 47, no. 1, pp. 56–64, Jan. 2009.
  32. K. Shi, X. Ma, and G. T. Zhou, “An efficient acoustic echo cancellation design for systems with long room impulses and nonlinear loudspeakers,” Signal Processing, vol. 89, no. 2, pp. 121–132, Feb. 2009.
  33. X. Ma, W. Zhang, and A. Swami, “Lattice-reduction aided equalization for OFDM systems,” IEEE Trans. Wireless Communications, vol. 8, no. 4, pp. 1608–1613, Apr. 2009.
  34. Q. Liu, R. J. Baxley, X. Ma, and G. T. Zhou, “Error vector magnitude optimization for OFDM Systems with a deterministic peak to-average power ratio constraint,” IEEE Journal of Special Topics in Signal Processing, vol. 3, no. 3, pp. 418–429, Jun. 2009.
  35. C. Wang and X. Ma, “Deriving Cramer-Rao bounds and maximum likelihood estimators for traffic matrix inference,” ACM SIGMETRICS Performance Evaluation Review, vol. 37, no. 2, pp. 12–14, Oct. 2009.
  36. K. Shi and X. Ma, “A frequency domain step-size control method for LMS algorithms,” IEEE Signal Processing Letters, vol. 17, no. 2, pp. 125–128, Feb. 2010.
  37. K. Shi and X. Ma, “A variable-step-size NLMS algorithm using statistics of channel response,” Signal Processing, pp. 2107–2111, Jun. 2010.
  38. W. Zhang and X. Ma, “Low-complexity soft-output decoding with lattice-reduction-aided detectors,” IEEE Trans. on Communications, pp. 2621–2629, Sept. 2010.
  39. W. Zhang, X. Ma, and A. Swami, “Designing low-complexity detectors based on Seysen’s algorithm,” IEEE Trans. Wireless Communications, pp. 3301 – 3311, Oct. 2010.
  40. Q. Liu, R. Baxley, X. Ma, and G. T. Zhou, “Diversity-enabled and power-efficient transceiver designs for peak-power-limited SIMO-OFDM systems,” EURASIP Journal of Applied Signal Processing, vol. 2010, Article ID 535943, April 2010.
  41. Q. Zhou, X. Ma, and V. Lottici, “Multi-symbol based fast detectors for UWB communications,” EURASIP Journal of Applied Signal Processing, vol. 2010, Article number 903161, April 2010.
  42. X. Ma, G. Choi, and W. Zhang, “Network Modulation (NeMo): an algebraic approach to enhancing network data persistency,” EURASIP Journal of Wireless Communications and Networking, vol. 2010, Article number 141340, Jul. 2010.
  43. Q. Liu, X. Ma, and G. T. Zhou, “A general diversity gain function and its application in amplify-andforward cooperative networks,” IEEE Trans. on Signal Processing, vol. 59, no. 2, pp. 859–863, Feb. 2011.
  44. B. Gestner, W. Zhang, X. Ma, and D. V. Anderson, “Lattice reduction for MIMO detection: from theoretical analysis to hardware realization,”, IEEE Trans. Circuits and Systems – I: Regular Papers, vol. 58, no. 4, pp. 813-826, Apr. 2011.
  45. K. Sakai, B. R. Hamilton, W.-S. Ku, M.-T. Sun, and X. Ma, “G-STAR: Geometric STAteless Routing for 3-D wireless sensor networks,” Ad Hoc Networks, vol. 9, no. 3, pp. 341–354, May 2011.
  46. G. Choi, W. Zhang, and X. Ma, “Designing diversity-enabled power profiles for wireless relay networks,” IEEE Trans. on Wireless Communications, vol. 10, no. 7, pp. 2124–2134, Jul. 2011.
  47. Y. Wang, X. Ma, and G. Leus, “Robust time-based localization for asynchronous networks,” IEEE Trans. on Signal Processing, vol. 59, no. 9, pp. 4397–4410, Sept. 2011.
  48. B. R. Hamilton, X. Ma, J. Kleider, and R. J. Baxley, “OFDM pilot design for channel estimation with null edge subcarriers,” IEEE Trans. on Wireless Communications, vol. 10, no. 10, pp. 3145–3150, Oct. 2011.
  49. B. Gestner, X. Ma, and D. V. Anderson, “Incremental lattice reduction: motivation, theory, and practical implementation,” IEEE Trans. on Wireless Communications, vol. 11, no. 1, pp. 188–198, Jan. 2012.
  50. H. Kim, X. Ma, and B. R. Hamilton, “Tracking low-precision clocks with time-varying drifts using Kalman filtering,” IEEE/ACM Trans. on Networking, vol. 20, no. 1, pp. 257 – 270, Feb. 2012.
  51. Q. Zhou and X. Ma, “Designing low-complexity near-optimal multi-symbol detectors for impulse radio UWB systems,” IEEE Trans. on Signal Processing, vol. 60, no. 5, pp. 2460–2469, May 2012.
  52. Q. Liu, W. Zhang, X. Ma, and G. T. Zhou, “Designing peak power constrained amplify-and-forward relay networks with cooperative diversity,” IEEE Trans. on Wireless Communications, vol. 11, no. 5, pp. 1733–1743, May 2012.
  53. G. Choi, W. Zhang, and X. Ma, “Achieving joint diversity in MIMO relay networks with zero-forcing equalizers,” IEEE Trans. on Communications, vol. 60, no. 6, pp. 1545–1554, Jun. 2012.
  54. Q. Zhou and X. Ma, “Soft-input soft-output multiple symbol differential detection for UWB communications,” IEEE Communications Letters, vol. 16, no. 8, pp. 1296–1299, Aug. 2012.
  55. Q. Zhou and X. Ma, “Element-based lattice reduction algorithms for large MIMO detection,” IEEE Journal Selected Areas Communications, vol. 31, no. 2, pp. 274–286, Feb. 2013.
  56. Q. Zhou, X. Ma, and V. Lottici, “Generalized code-multiplexing for UWB communications,” IEEE Trans. on Wireless Communications, vol. 12, no. 6, pp. 2806 – 2816, June 2013.
  57. Q. Zhou and X. Ma, “Improved element-based lattice reduction algorithms for wireless communications,” IEEE Trans. Wireless Communications, vol. 12, no. 9, Sept. 2013.
  58. Q. Zhou and X. Ma, “Shot interference detection and mitigation for heterogeneous networks,” IEEE Trans. on Vehical Technology, vol. 63, no. 1, pp. 225–236, pp. 4414–4421, Jan. 2014.
  59. B. R. Hamilton, X. Ma, R. J. Baxley, and S. M. Matechik, “Propagation Modeling for Radio Frequency Tomography in Wireless Networks,” IEEE Journal of Selected Topics in Signal Processing, vol. 8, no. 1, pp. 55–65, Jan. 2014.
  60. Q. Zhou and X. Ma, “Receiver Designs for Differential UWB Systems with Multiple Access Interference,” IEEE Trans. Communications, vol. 62, no. 1, pp. 126 – 134, Jan. 2014.
  61. M. Mondelli, Q. Zhou, V. Lottici, and X. Ma, “Joint Power Allocation and Path Selection for MultiHop Noncoherent UWB Communications,” IEEE Trans. on Wireless Communications, vol. 12, no. 6, pp. 1397–1409, Jun. 2014.
  62. M. M. U. Gul, S. Lee, and X. Ma, “Carrier frequency offset estimation for OFDMA uplink using null sub-carriers,” Digital Signal Processing, vol. 29, pp. 127–137, Jun. 2014
  63. L. Cheng, M. Zhu, M. M. U. Gul, X. Ma, G. K. Chang, “Adaptive Photonics-Aided Coordinated Multipoint Transmissions for Next-Generation Mobile Fronthaul,” IEEE/OSA Journal of Lightwave Technology, vol. 32, no. 10, pp. 1907–1914, Jun. 2014.
  64. Y. Wang, L. Li, X. Ma, C. Chen, and X. Guan, “Dual-Tone Radio Interferometric Positioning Systems Using Undersampling Techniques,” IEEE Signal Processing Letters, vol. 21, no. 11, pp. 1311–1315, Nov. 2014.
  65. M. M. U. Gul, S. Lee, and X. Ma, “ PARAFAC-Based Frequency Synchronization for SC-FDMA Uplink Transmissions,” EURASIP Journal on Advances in Signal Processing, vol. 2014, Article number: 146, Sept. 2014.
  66. S. Lee and X. Ma, “Eigenvector-based Initial Ranging Process for OFDMA Uplink Systems,” EURASIP Journal on Advances in Signal Processing, vol. 2015, Article number: 1 , Jan. 2015.
  67. S. Zhu, C. Chen, X. Ma, B. Yang, and X. Guan, “Distributed Parameter Estimation for Heterogeneous Sensor Networks with Asymmetric Communication,” Journal of Selected Topics in Signal Processing, vol. 9, no. 2, pp. 278–291, Feb. 2015.
  68. M. M. U. Gul, S. Lee, and X. Ma, “Timing and frequency synchronization for OFDM downlink transmissions using Zadoff-Chu sequences,” IEEE Trans. on Wireless Communications, vol. 14, no. 3, pp. 1716–1729, Mar. 2015.
  69. Y. Wang , X. Ma, C. Chen, and X. Guan, “Designing Dual-Tone Radio Interferometric Positioning Systems,” IEEE Trans. on Signal Processing, vol. 63, no. 6, pp. 1351–1365, Jun. 2015.
  70. X. Li, T. Jiang, X. Ma, R. Fan, and J. An, “Secure Space-Time Communication over Rayleigh Flat Fading Channels,” IEEE Trans. on Wireless Communications, vol. 15, no. 2, pp. 1491–1504, Oct. 2015.
  71. Z. Wang, H. Liu, X. Ma, J. An, and S. Xu, “Enhancing Indoor Radio Tomographic Imaging Based on Interference Link Elimination,” Digital Signal Processing, vol. 44, pp. 26–36, Sept. 2015.
  72. H. Jamali-Rad, A. Simonetto, X. Ma, and G. Leus, “Distributed Sparsity-Aware Sensor Selection,” IEEE Trans. on Signal Processing, vol. 63, no. 22, pp. 26–36, pp. 5951–5964, Nov. 2015.
  73. M. Shinotsuka, Y. Wang, X. Ma, and G. T. Zhou, “Analyzing Radio Interferometric Positioning Systems with Undersampling Receivers,” EURASIP Journal on Advances in Signal Processing, vol. 2015, Article number: 82, Sept. 2015.
  74. X. Li, R. Fan, X. Ma, J. An, and T. Jiang, “Secure Space-Time Communications Over Rayleigh Flat Fading Channels,” IEEE Trans. on Wireless Communications, vol. 15, no. 2, pp. 1491–1504, Feb. 2016.
  75. L. Cheng, M. M. U. Gul, F. Lu, M. Zhu, J. Wang, M. Xu, X. Ma, and G.-K. Chang, “Coordinated Multipoint Transmissions in Millimeter-Wave Radio-Over-Fiber Systems,” Journal of Lightwave Technology, vol. 34, no. 2, pp. 653–660, Feb. 2016.
  76. Q. Wen and X. Ma, “Efficient Greedy LLL Algorithms for Lattice Decoding,” IEEE Trans. On Wireless Communications, vol. 15, no. 5, pp. 3560–3572, May 2016.
  77. B. Beck, X. Ma, and R Baxley, “Ultrawideband Tomographic Imaging in Uncalibrated Networks,” IEEE Trans. on Wireless Communications, vol. 15, no. 9, pp. 6474–6486, Sept. 2016.
  78. A. D. Harper and X. Ma, “MIMO Wireless Secure Communication Using Data-Carrying Artificial Noise,” IEEE Trans. on Wireless Communications, vol. 15, no. 12, pp. 8051–8062, Dec. 2016.
  79. B. Hu, C. Hua, C. Chen, X. Ma, and X. Guan, “MUBFP: Multiuser Beamforming and Partitioning for Sum Capacity Maximization in MIMO Systems,” IEEE Trans. on Vehicular Technology, vol. 66, no. 1, pp. 233–245, Jan. 2017.
  80. J. Wang, Z. Yu, K. Ying, J. Zhang, F. Lu, M. Xu, L. Cheng, X. Ma, and G.-K. Chang, “Digital mobile fronthaul based on delta-sigma modulation for 32 LTE carrier aggregation and FBMC signals” Journal of Optical Communications and Networking, vol. 9, no. 2, pp. A233-A244, 2017.
  81. A. Harper, J. Reed, J. Odom, A. Lanterman, and X. Ma, “Performance of a Linear-Detector Joint Radar-Communication System in Doubly-Selective Channels ,” IEEE Trans. On Aerospace and Electronics Systems, vol 53, no. 2, pp. 703–715, Feb. 2017.
  82. B. Beck, R. Baxley, and X. Ma, “Uncooperative Emitter Localization Using Signal Strength in Uncalibrated Mobile Networks,” IEEE Trans. on Wireless Communications, vol. 16, no. 11, pp. 7488–7500, Nov. 2017.
  83. Q. Shi, N. Wu, X. Ma, and H. Wang, “Frequency-Domain Joint Channel Estimation and Decoding for Faster-Than-Nyquist Signaling,” IEEE Trans. on Communications, vol. 66, no. 2, pp. 781–795, Feb. 2018.
  84. R. Zhang, X. Ma, D. Wang, F. Yuan, and E. Cheng, “Underwater video transceiver designs based on channel state information and video content,” Frontiers of Information Technology and Electronic Engineering, vol. 19, pp. 984–998, Oct. 2018.
  85. H. Cho, X. Ma, M. Xu, and G.-K. Chang, “Non-Periodic Data-Aided Joint Timing and Carrier Frequency Offsets Estimation for FBMC Systems,” IEEE Trans. on Vehicular Technology, vol. 67, no. 10, pp. 9764–9774, Oct. 2018.
  86. D. Huang, X. Ma, and S. Zhang, “Performance Analysis of the Raft Consensus Algorithm for Private Blockchains,” IEEE Trans. on Systems, Man and Cybernetics: Systems, vol. 50, no. 1 pp. 172–181, Jan. 2020.
  87. Y. Yang, F. Gao, X. Ma, and S. Zhang, “Deep Learning-Based Channel Estimation for Doubly Selective Fading Channels,” IEEE Access, vol. 7, pp. 36579–36589, 2019.
  88. Q. Tan, Y. Wang, and X. Ma, “Preamble Detection Based on Cyclic Features of Zadoff-Chu Sequences for Underwater Acoustic Communications,” IEEE Signal Processing Letters, vol. 26, no. 8, pp. 1192–1196, 2019.
  89. Y. Han, C.-K. Wen, S. Jin, M. Matthaiou, and X. Ma, “Tracking FDD Massive MIMO Downlink Channels By Exploiting Delay and Angular Reciprocity”, IEEE Journal of Selected Topics in Signal Processing, vol. 13, no. 5, pp. 1062–1076, Sept. 2019.
  90. Y. Han, C.-K. Wen, S. Jin and X. Ma, “Large Intelligent Surface-Assisted Wireless Communication Exploiting Statistical CSI,” IEEE Trans. on Vehicular Technology, vol. 68, no. 8, pp. 8238–8242, Aug. 2019.
  91. Y. Ge, W. Zhang, F. Gao, S. Zhang and X. Ma, “Beamforming Network Optimization for Reducing Channel Time Variation in High-Mobility Massive MIMO,” IEEE Transactions on Communications, vol. 67, no. 10, pp. 6781-6795, Oct. 2019, doi: 10.1109/TCOMM.2019.2926464.
  92. Y. Kong, X. Ma, and J. Lu, “Orthogonality Deficiency of Massive MIMO Channels: Distribution and Relationship with Performance,” IEEE Signal Processing Letters, vol. 26, no. 11, pp. 1603–1607, Nov. 2019.
  93. Y. Ma, F. Tian, N. Wu, Bin Li, and X. Ma,“A Low-Complexity Receiver for Multicarrier Faster-ThanNyquist Signaling Over Frequency Selective Channels,” IEEE Communications Letters, vol. 24, no. 1, pp. 81–85, Jan. 2020.
  94. Y. Han, C.-K. Wen, S. Jin, and X. Ma, “Channel Estimation for Extremely Large-Scale Massive MIMO Systems,” IEEE Wireless Communication Letters, vol. 9, no. 5, pp. 633–637, May 2020.
  95. Q. Shi, N. Wu, H. Wang, L. Hanzo, and X. Ma, “Factor Graph Based Message Passing Algorithms for Joint Phase-Noise Estimation and Decoding in OFDM-IM,” IEEE Transactions on Communications, vol. 68, no. 5, pp. 2906–2921, May 2020.
  96. J. Qi, J. Du, S. M. Siniscalchi, X. Ma, and C.-H. Lee, “Analyzing Upper Bounds on Mean Absolute Errors for Deep Neural Network Based Vector-to-Vector Regression,” IEEE Trans. on Signal Processing, vol. 68, pp. 3411–3422, Jun. 2020.
  97. W. Zhao, G. Wang, S. Atapattu, T. A. Tsiftsis, and X. Ma, “Performance Analysis of Large Intelligent Surface Aided Backscatter Communication Systems,” IEEE Wireless Communication Letters, vol. 9, no. 7, pp. 962–966, July 2020.
  98. S. Y.-C. Chen, C.-H. H. Yang, J. Qi, P. Y. Chen, X. Ma, and H.-S. Goan, “Variational Quantum Circuits for Deep Reinforcement Learning,” IEEE Access, vol. 8, pp. 141007–141024, Aug. 2020.
  99. J. Qi, J. Du, S. M. Siniscalchi, X. Ma, and C.-H. Lee, “On Mean Absolute Error for Deep Neural Network Based Vector-to-Vector Regression,” IEEE Signal Processing Letters, pp. 1485–1489, Aug. 2020.
  100. Y. Han, C.-K. Wen, S. Jin, and X. Ma, “Deep Learning Based FDD Non-Stationary Massive MIMO Downlink Channel Reconstruction,” IEEE Journal of Selected Areas of Communications, vol. 38, no. 9, pp. 1980–1993, Sept. 2020.
  101. M. S. Omar and X. Ma, “Spectrum Design for Orthogonal Chirp Division Multiplexing Transmissions,” IEEE Wireless Communication Letters, vol. 9, no. 11, pp. 1990–1994, Nov. 2020.
  102. Y. Ge, W. Zhang, F. Gao, G. Wang, and X. Ma, “High-Mobility Massive MIMO with Beamforming Network Optimization: Doppler Spread Analysis and Scaling Law,” IEEE Journal of Selected Areas of Communications, vol. 38, no. 12, pp. 2889–2902, Dec. 2020.
  103. H. Wu, X. Ma, C. H. Yang, and S. Liu, “Attention Based Bidirectional Convolutional LSTM for High Resolution Radio Tomographic Imaging,” IEEE Trans. on Circuits and Systems–II: Express Briefs, vol. 68, No. 4, pp. 1482-1486, Apr. 2021.
  104. J. Zhang, X. Ma, J. Qi, and S. Jin, “Designing Tensor-Train Deep Neural Networks For Time-Varying MIMO Channel Estimation,” IEEE Journal of Selected Topics in Signal Processing, early access, Jan. 2021.
  105. L. Yan, X. Ma, X. Li, and J. Lu, “Shot Interference Detection and Mitigation for Underwater Acoustic Communication Systems,” IEEE Trans. on Communications, vol. 69, No. 5, pp. 3274-3285, May 2021.
  106. M. S. Omar and X. Ma, “Performance Analysis of OCDM for Wireless Communications,” IEEE Trans. on Wireless Communications, vol. 20, No. 7, pp. 4032-4043, July 2021.
  107. R. Zhang, X. Ma, D. Wang, F. Yuan, and E. Cheng, “Adaptive Coding and Bit-Power Loading Algorithms for Underwater Acoustic Transmissions,” IEEE Trans. on Wireless Communications, accepted Mar. 2021.
  108. H. Wu, X. Ma, and S. Liu, “Designing Multitask Convolutional Variational Autoencoder for Radio Tomographic Imaging,” IEEE Trans. on Circuits and Systems–II: Express Briefs, accepted May 2021.
  109. Z. Shi, Y. Wang, L. Liu, and X. Ma, “A Joint Sonar-Communication System Based on Multicarrier Waveforms,” IEEE Signal Processing Letters, accepted Aug. 2021.
  110. M. S. Omar and X. Ma, “Pilot symbol aided channel estimation for OCDM transmissions,” IEEE Communications Letters, Accepted Nov. 2021.
  111. R. Zhang, Y. Wang, and X. Ma, “Channel Estimation for OCDM Transmissions with Carrier Frequency Offset,” IEEE Wireless Communications Letters, Accepted Dec. 2021.
  112. S. Yao, X. Tang, R. Zhang, Q. Zhou, S.-J. Su, C.-W. Hsu, Y. M. Alfadhli, X. Ma, and G.-K. Chang, “Accelerating LMS-based Equalization with Correlated Training Sequence in Bandlimited IM/DD Systems,” IEEE/OSA Journal of Lightwave Technology, accepted Mar. 2022.

Submitted and under review

  1. Y. Alfadhli, R. Sarkar, H. Gupta, S. Yao, M. Sethuraman, C.-W. Hsu, S.-J. Su, G.-K. Chang, and X. Ma, “P4MEC: Empowering In-network Computing to Support Cooperative-URLLC Services at the Aggregation Layer,” Journal of Network and Computer Applications, submitted Oct. 2021.
  2. D. Huang, S. Zhang, and X. Ma, “Block Confirmation Time Analysis for PBFT Consensus in Permissioned Blockchains,” IEEE/ACM Transactions on Networking, submitted Jan. 2022.
  3. K. Zheng and X. Ma, “Designing learning-based adversarial attacks to (MIMO-)OFDM systems with adaptive modulation,” IEEE Transactions on Wireless Communications, submitted Feb. 2022.
  4. Z. He and X. Ma, “Improving Radio Tomographic Imaging Accuracy by Attention Augmented Optimization Technique,” IEEE Signal Processing Letters, submitted Mar. 2022.
  5. D. Guidotti, B. Yang, M. S. Omar, S.-J. Su, Y. M. Alfadhli, G.-K. Chang, and X. Ma, “Small Formfactor Beamforming for Simultaneous Spatial and Channel Diversity Communications,” IEEE Transactions on Antennas and Propagation, submitted Feb. 2022.

Conference Publications

  1. X. Ma and G. Tao, “Adaptive control designs for a two-body system,” in Proc. the 38th IEEE Conference on Decision and Control, vol. 2, pp. 1246–1247, Phoenix, AZ, Dec. 7-10, 1999.
  2. G. Tao and X. Ma, “Backlash compensation for multivariable nonlinear systems with actuator dynamics,” in Proc. the 38th IEEE Conference on Decision and Control, vol. 4, pp. 3382–3387, Phoenix, AZ, Dec. 7-10, 1999.
  3. X. Ma and G. Tao, “Adaptive actuator compensation control with feedback linearization,” in Proc. the 38th IEEE Conference on Decision and Control, vol. 5, pp. 5194–5199, Phoenix, AZ, Dec. 7-10, 1999.
  4. G. Tao, X. Ma, and S. M. Joshi, “Adaptive state feedback control of systems with actuator failures,” in Proc. American Control Conf., vol. 4, pp. 2669–2673, Chicago, IL, Jun. 2000.
  5. G. Tao, X. Ma, and S. M. Joshi, “Adaptive output tracking control of systems with actuator failures,” in Proc. American Control Conf., vol. 4, pp. 2654–2658, Chicago, IL, Jun. 2000.
  6. G. Tao and X. Ma, “Adaptive actuator compensation control for multivariable nonlinear systems,” in Proc. American Control Conf., vol. 4, pp. 2664–2668, Chicago, IL, Jun. 2000.
  7. Z. Liu, X. Ma, and G. B. Giannakis, “Space-time coding and Kalman filtering for diversity transmissions through time-selective fading channels,” in Proc. Military Communications Conference, vol. 1, pp. 382–386, Los Angeles, CA, Oct. 22-25, 2000.
  8. X. Ma, C. Tepedelenlioglu, and G. B. Giannakis, “Consistent blind synchronization of OFDM transmissions using null subcarriers with distinct spacings,” in Proc. IEEE Workshop on Signal Processing Advances for Wireless Communications, pp. 146–149, Taoyuan, Taiwan, Mar. 20-23, 2001.
  9. X. Ma and G. B. Giannakis, “Robustifying OFDM against frequency-offsets using space-time block coding,” in Proc. the 35th Conference on Information Science and Systems, pp. 682–691, The Johns Hopkins University, Baltimore, MD, Mar. 21-23, 2001.
  10. X. Ma, G. B. Giannakis, and S. Barbarossa, “Non-data aided frequency-offset and channel estimation in OFDM and related block transmissions,” in Proc. IEEE International Conference on Communications, vol. 6, pp. 1866–1870, Helsinki, Finland, Jun. 11-15, 2001.
  11. X. Ma and G. B. Giannakis, “Designing maximum multipath-Doppler diversity transmissions over time- and frequency-selective wireless channels,” in Proc. the 39th Allerton Conference on Communication, Control and Computing, pp. 682–691, University of Illinois at U-C, Monticello, IL, Oct. 3-5, 2001.
  12. X. Ma and G. B. Giannakis, “Unifying and optimizing null sub-carrier based frequency offset estimators for OFDM,” in Proc. International Conference on Information, Communications, and Signal Processing, Singapore, Oct. 13-15, 2001.
  13. X. Ma and G. B. Giannakis, “Maximum-diversity transmissions over time-selective wireless channels,” in Proc. Wireless Communications and Networking Conference, vol. 1, pp. 497–501, Orlando, FL, Mar. 17-21, 2002.
  14. Z. Wang, X. Ma, and G. B. Giannakis, “Optimality of single-carrier zero-padded block transmissions,” in Proc. Wireless Communications and Networking Conference, vol. 2, pp. 660–664, Orlando, FL, Mar. 17-21, 2002.
  15. G. B. Giannakis, X. Ma, G. Leus, and S. Zhou, “Space-time doppler coding over time-selective fading channels with maximum diversity and coding gains,” in Proc. International Conference on Acoustics, Speech, and Signal Processing, vol. 3, pp. 2217–2220, Orlando, FL, May 13-17, 2002.
  16. X. Ma, G. B. Giannakis, and S. Ohno, “Optimal training for block transmissions over doubly-selective fading channels,” in Proc. International Conference on Acoustics, Speech, and Signal Processing, vol. 2, pp. 1509–1512, Orlando, FL, May 13-17, 2002.
  17. X. Ma and G. B. Giannakis, “Space-time coding for doubly-selective channels,” Proc. International Conference on Circuits and Systems, vol. 3, pp. 647–650, Scottsdale, AZ, May 25-29, 2002.
  18. X. Ma and G. B. Giannakis, “Layered space-time complex-field coding: full-diversity with full-rate and tradeoffs,” in Proc. the 2nd Sensor Array and Multi-channel Processing Workshop, pp. 442–446, Rosslyn, VA, Aug. 4-6, 2002.
  19. X. Ma and G. B. Giannakis, “Maximum diversity space-time systems with maximum rate for any number of antennas,” in Proc. the 40th Allerton Conference on Communication, Control and Computing, pp. 725–726, University of Illinois at U-C, Monticello, IL, Oct. 2-4, 2002.
  20. X. Ma and G. B. Giannakis, “Full-rate full-diversity space-time complex-field codes for frequencyor time-selective fading channels,” in Proc. the 36th Asilomar Conference on Signals, Systems, and Computers, pp. 1714–1718, Pacific Grove, CA, Nov. 3-6, 2002.
  21. X. Ma, L. Yang, and G. B. Giannakis, “Optimal training for MIMO frequency-selective fading channels,” in Proc. the 36th Asilomar Conference on Signals, Systems, and Computers, pp. 1107–1111, Pacific Grove, CA, Nov. 3-6, 2002.
  22. X. Ma and G. B. Giannakis, “Space-time-multipath coding using digital phase sweeping,” in Proc. IEEE Global Telecommunications Conference, pp. 384–388, Taipei, Taiwan, Nov. 17-21, 2002.
  23. B. Lu, X. Ma, and G. B. Giannakis, “Block decision feedback differential coding for rapidly fading channels,” in Proc. International Conference on Acoustics, Speech, and Signal Processing, vol. 4, pp. 169–172, Hong Kong, Apr. 6-10, 2003.
  24. X. Ma, B. Lu, and G. B. Giannakis, “Block differential encoding for rapidly fading channels,” in Proc. International Conference on Communications, pp. 3570–3574, Anchorage, Alaska, May 11-15, 2003.
  25. M.-K. Oh, X. Ma, G. B. Giannakis, and D.-J. Park, “Cooperative synchronization and channel estimation in wireless sensor networks,” in Proc. the 37th Asilomar Conf. on Signals, Systems, and Computers, pp. 238–242, Pacific Grove, CA, Nov. 9-12, 2003.
  26. M.-K. Oh, X. Ma, G. B. Giannakis, and D.-J. Park, “Hopping pilots for estimation of frequencyoffsets and multi-antenna channels for MIMO OFDM,” in Proc. IEEE Global Telecommunications Conference, pp. 1084–1088, San Francisco, CA, Dec. 1-5, 2003.
  27. R. Wang, X. Ma, and G. B. Giannakis, “Improving performance of coded FDFR multi-antenna systems with turbo-decoding,” in Proc. International Symposium on Signal Processing and Information Technology, pp. 306–309, Darmstadt, Germany, Dec. 14-17, 2003.
  28. X. Ma, J. Kleider, S. Gifford, G. B. Giannakis, and B. Lu, “Iterative decoding for differential MIMO systems with near-coherent performance,” in Proc. Software Defined Radio Technical Conference, Phoenix, AZ, Nov. 15-18, 2004..
  29. L. Yang, X. Ma, and G. B. Giannakis, “Optimal training for doubly-selective MIMO fading channels,” in Proc. International Conference on Acoustics, Speech, and Signal Processing, vol. 3, pp. 821–824, Montreal, Quebec, Canada, May 17-21, 2004.
  30. X. Liu, Z. Li, and X. Ma, “An EM algorithm for frequency collision resolution in wireless ad hoc networks,” in Proc. Military Communications Conference, pp. 1635–1639, Monterey, CA, Oct. 31- Nov. 3, 2004.
  31. X. Ma, “Exploiting cooperative diversity for wireless sensor networks using MAC protocols,” in Proc. Military Communications Conference, pp. 1675–1681, Monterey, CA, Oct. 31-Nov. 3, 2004.
  32. X. Ma and W. Zhang, “Performance analysis for V-BLAST systems with linear equalization,” in Proc. Conference on Information Sciences and Systems, Johns Hopkins University, Baltimore, MD, Mar. 16-18, 2005.
  33. X. Ma, “Block double differential design for OFDM with carrier frequency offset,” in Proc. International Conference on Acoustics, Speech, and Signal Processing, vol. 3, pp. 813–816, Philadelphia, PA, Mar. 19-23, 2005.
  34. A. Cano, X. Ma, and G. B. Giannakis, “Block-differential modulation for doubly-selective wireless fading channels,” Proc. International Conference on Communications, pp. 1922–1926, Seoul, Korea, May 16-20, 2005.
  35. X. Ma, L. Song, and J. Kleider, “Differential OFDM Design with Channel Shortening Equalization,” in Proc. IEEE Workshop on Signal Processing Advances for Wireless Communications, pp. 860–864, New York City, NY, Jun. 5-8, 2005.
  36. X. Ma, S. Zhou and X. Liu, “A novel view on modulus-preserving rate-one space time block codes,” in Proc. International Conference on Wireless Networks, Communications, and Mobile Computing, pp. 710–715, Maui, HI, Jun. 13-16, 2005.
  37. M. -T. Sun, X. Ma, C.-W. Yi, C.-K. Yang, and T.-H. Lai, “Minimum disc cover set construction in mobile ad hoc networks,” in Proc. International Conference on Computer Networks and Mobile Computing, Zhangjiajie, China, Aug. 2-4, 2005.
  38. X. Ma, W. Zhang, and A. Swami, “Lattice-reduction aided linear equalizer design for linear complex-field coded OFDM systems,” in Proc. Military Communications Conference, pp. 1368–1374, Atlantic City, NJ, Oct. 17-20, 2005.
  39. M. -T. Sun, X. Ma, J. Liu and X. Liu, “A greedy smart path pruning strategy for geographical routing in wireless networks,” in Proc. Military Communications Conference, pp. 1326–1332, Atlantic City, NJ, Oct. 17-20, 2005.
  40. J. Kleider and X. Ma, “Adaptive channel shortening equalization for coherent OFDM doubly selective channels,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, vol. 4, pp. 361–364, Toulouse, France, May 15-19, 2006.
  41. A. Cano, X. Ma, and G. B. Giannakis, “Space-time differential modulation using linear constellation precoding,” in Proc. IEEE International Conference on Communications, pp. 2991–2995, Istanbul, Turkey, June 11-15, 2006.
  42. W. Zhang, X. Ma, and A. Swami, “Maximum diversity of MIMO-OFDM schemes with linear equalizers,” in Proc. IEEE Workshop on Sensor Array and Multi-channel Processing, pp. 229–233, Waltham, MA, July 12-14, 2006.
  43. X. Ma, M.-T. Sun, G. Zhao, and X. Liu, “Improving geographical routing for wireless networks with an efficient path pruning algorithm,” in Proc. the 3rd IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks (SECON), pp. 246–255, Reston, VA, Sept. 25-28, 2006.
  44. X. Ma, R. J. Baxley, J. Kleider, and G. T. Zhou, “Superimposed training for channel shortening equalization in OFDM,” in Proc. Military Communications Conference, Washington D.C., Oct. 22-25, 2006.
  45. X. Ma and W. Zhang, “Performance limits of linear equalizers: diversity and capacity,” in Proc. the 21st Signal Processing Symposium, Kyoto, Japan, Nov. 15-17, 2006 .
  46. X. Liu, G. Zhao, X. Ma, and M.-T. Sun, “Path shortening for delivery rate enhancement in geographical routing via channel listening,” in Proc. IEEE Global Telecommunications Conference, San Francisco, CA, Nov. 27-Dec. 1, 2006.
  47. J. Li, X. Liu, and X. Ma, “Dual channel transmission for coexistence of bluetooth piconets with multislot packets,” in Proc. IEEE International Symposium on Wireless Pervasive Computing, pp. 389–394, San Juan, Puerto Rico, Feb. 5-7, 2007.
  48. M. Fyffe, M. -T. Sun, and X. Ma, “Traffic-adapted load balancing in sensor networks employing geographic routing,” in Proc. IEEE Wireless Communications and Network Conference, pp. 4392–4397, Hong Kong, Mar. 11-15, 2007.
  49. W. Zhang and X. Ma, “Approaching optimal performance by lattice-reduction aided soft detectors,” in Proc. the 41st Conference on Information Sciences and Systems, pp. 818–822, Johns Hopkins University, Baltimore, MD, Mar. 14-16, 2007.
  50. X. Liu, G. Zhao, and X. Ma, “Target localization and tracking in noisy binary sensor networks with known spatial topology,” in Proc. International Conference on Acoustics, Speech, and Signal Processing, pp.1029–1032, Honolulu, HI, Apr. 15-20, 2007.
  51. W. Zhang and X. Ma, “What determines the diversity order of linear equalizers?,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 57–60, Honolulu, HI, Apr. 15-20, 2007.
  52. W. Zhang and X. Ma, “A Suboptimal equalizer for MIMO systems to guarantee maximum diversity and near linear equalization complexity,” in Proc. IEEE Workshop on Signal Processing Advances in Wireless Communications, Helsinki, Finland, Jun. 17-20, 2007.
  53. B. R. Hamilton and X. Ma, “Noncooperative routing with cooperative diversity,” in Proc. IEEE International Conference on Communications, pp. 4237–4242, Glasgow, Scotland, June 24-27, 2007.
  54. R. Wang, B. L. Shrestha, and X. Ma, “Channel delay impact on CCSDS file delivery protocol (CFDP) over space communications links,” in Proc. International Conference on Communications, pp. 5201–5205, Glasgow, Scotland, Jun. 24-28, 2007.
  55. J. Liu, X. Liu, and X. Ma, “First-order perturbation analysis for subspace decomposition,” in Proc. IEEE Statistical Signal Processing Workshop, pp. 532–536, Madison, WI, Aug. 26-29, 2007.
  56. K. Shi, X. Ma, and G. T. Zhou, “Adaptive nonlinearity identification in a Hammerstein system using a pseudo-coherence function,” in Proc. IEEE Statistical Signal Processing Workshop, pp. 745–748, Madison, WI, Aug. 26-29, 2007.
  57. K. Shi, X. Ma, and G. T. Zhou, “A channel shortening approach for nonlinear acoustic echo cancellation,” in Proc. IEEE Statistical Signal Processing Workshop, pp. 351–354, Madison, WI, Aug. 26-29, 2007.
  58. J. Kleider, G. Maalouli, and X. Ma, “Timing synchronization in distributed mobile MISO Rayleigh fading channels,” in Proc. IEEE Military Communications Conference, Orlando, FL, Oct. 29-31, 2007.
  59. W. Zhang, X. Ma, and A. Swami, “Designing soft detectors based on Seysen’s algorithm,” Proc. IEEE Military Communications Conference*, Orlando, FL, Oct. 29-31, 2007.
  60. K. Shi, X. Ma, and G. T. Zhou, “A mutual information based double talk detector for nonlinear systems,” in Proc. IEEE Conference on Information Sciences and Systems, pp. 356–360, Princeton Univ., NJ, Mar. 19-21, 2008.
  61. Q. Liu, R. J. Baxley, X. Ma, and G. T. Zhou, “EVM optimization for OFDM systems with a peakto-average power ratio constraint,” in Proc. IEEE Conference on Information Sciences and Systems, pp. 101–104, Princeton Univ., NJ, Mar. 19-21, 2008.
  62. K. Shi, X. Ma, and G. T. Zhou, “Adaptive acoustic echo cancellation in the presence of multiple nonlinearities,” Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 3601–3604, Las Vegas, NV, Mar. 30-Apr. 4, 2008.
  63. K. Shi, X. Ma, and G. T. Zhou, “A residual echo suppression technique for nonlinear acoustic echo cancellation,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 257–260, Las Vegas, NV, Mar. 30-Apr. 4, 2008.
  64. W. Zhang and X. Ma, “Quantifying diversity for wireless systems with finite-bit representation,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 2841–2844, Las Vegas, NV, Mar. 30-Apr. 4, 2008.
  65. J. Kleider, X. Ma, R. Baxley, and G. T. Zhou, “MISO joint synchronization-pilot design for OFDM systems,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 3033–3036, Las Vegas, NV, Mar. 30-Apr. 4, 2008.
  66. B. Gestner, W. Zhang, X. Ma, and D. V. Anderson, “VLSI implementation of a lattice reduction aided low-complexity equalizer,” in Proc. IEEE International Conference on Circuits and Systems for Communications, pp. 643–647, Shanghai, China, May 26-28, 2008.
  67. B. R. Hamilton, X. Ma, Q. Zhao, and J. Xu, “ACES: Adaptive clock estimation and synchronization using Kalman filtering,” in Proc. ACM International Conference on Mobile Computing (MobiCom), San Francisco, CA, Sept. 14-19, 2008 .
  68. K. Shi, X. Ma, and G. T. Zhou, “A Double-Talk Detector Based on Generalized Mutual Information for Stereophonic Acoustic Echo Cancellation in the Presence of Nonlinearity,” in Proc. the 42nd Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 3-6, 2008.
  69. Q. Liu, X. Ma, and G. T. Zhou, “Peak-to-Average Power Ratio versus Instantaneous-to-Average Power Ratio for OFDM,” in Proc. the 42th Asilomar Conference on Signals, Systems, and Computers, pp.938–942, Pacific Grove, CA, Nov. 3-6, 2008.
  70. G.-W. Choi, W. Zhang, and X. Ma, “Diversity-enabled power profile design for relay networks,” in Proc. IEEE Military Communications Conference, San Diego, CA, Nov. 14-17, 2008.
  71. W. Zhang and X. Ma, “A novel lattice reduction aided linear precoding scheme,” in Proc. the 43rd Conference on Information Sciences and Systems, pp. 518–523, Johns Hopkins University, Baltimore, MD, Mar.18-20, 2009.
  72. K. Shi, X. Ma, and G. T. Zhou, “A variable step size and variable tap length LMS algorithm for impulse responses with exponential power profile,” in Proc. International Conf. on Acoustics, Speech, and Signal Processing, pp. 3105–3108, Taipei, Taiwan, Apr. 26-29, 2009.
  73. Q. Liu, R. J. Baxley, X. Ma, and G. T. Zhou, “On the PTS method and BER-minimizing power allocation of the multi-channel OFDM system,” in Proc. International Conf. on Acoustics, Speech, and Signal Processing, pp. 2585–2588, Taipei, Taiwan, Apr. 26-29, 2009.
  74. B. Gestner, W. Zhang, X. Ma, and D. V. Anderson, “VLSI implementation of an effective lattice reduction algorithm with fixed-point considerations,” in Proc. International Conf. on Acoustics, Speech, and Signal Processing, pp. 577–580, Taipei, Taiwan, Apr. 26-29, 2009.
  75. C. Wang and X. Ma, “Deriving Cramer-Rao bounds and maximum likelihood estimators for traffic matrix inference,” in Proc. ACM the 11th Workshop on MAthematical Performance Modeling and Analysis (MAMA), Seattle, WA, Jun. 15, 2009.
  76. G. Choi, X. Ma, S. Pothuru, T. Qiu, and J. Xu, “Learning quality of experience,” in Proc. Learning for Networking Workshop, Seattle, WA, Jun. 15, 2009.
  77. W. Zhang, X. Ma, and G. Choi, “Enhancing data persistence for energy constrained networks by network modulation,” in Proc. IEEE the 47th Allerton Conference on Communication, Control and Computing, University of Illinois at U-C, Monticello, IL, Sept. 30-Oct. 2, 2009.
  78. B. Hamilton, X. Ma, and J. Kleider, “OFDM channel estimation performance under channels with a peak power constraint,” in Proc. IEEE Military Communications Conference, Boston, MA, Oct. 18-21, 2009.
  79. Q. Liu, R. J. Baxley, X. Ma, and G. T. Zhou, “Peak reduction for multiplexed asynchronous OFDM-FDMA,” in Proc. IEEE Military Communications Conference, Boston, MA, Oct. 18-21, 2009.
  80. H. Kim, S. Lee, X. Ma, and C. Wang, “Higher-order PCA for anomaly detection in large-scale networks,” in Proc. IEEE Third International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, pp. 85–88, Aruba, Dutch Antilles, Dec. 13-16, 2009.
  81. Q. Liu, W. Zhang, and X. Ma, “Practical and general amplify-and-forward designs for cooperative networks,” in Proc. IEEE Conference on Computer Communications (INFOCOM), San Diego, CA, Mar. 15-19, 2010.
  82. K. Shi and X. Ma, “Transform domain LMS algorithms for sparse system identification,” in Proc. International Conf. on Acoustics, Speech, and Signal Processing, Dallas, TX, Mar. 14-19, 2010.
  83. Q. Liu, W. Zhang, X. Ma, and G. T. Zhou, “A practical amplify-and-forward relaying strategy with an intentional peak power limit,” Proc. International Conf. on Acoustics, Speech, and Signal Processing, pp. 2518–2521, Dallas, TX, Mar. 14-19, 2010.
  84. J. Xiao, X. Ma, and S. McLaughlin, “Quantifying information rate losses with zero-forcing and maximum-likelihood detectors,” in Proc. International Conf. on Acoustics, Speech, and Signal Processing, Dallas, TX, Mar. 14-19, 2010.
  85. Q. Liu, R. J. Baxley, X. Ma, and G. T. Zhou, “Optimizing free subcarrier index to minimize peak-to-average power ratio for OFDM systems,” in Proc. International Conf. on Acoustics, Speech, and Signal Processing, pp. 3290–3293, Dallas, TX, Mar. 14-19, 2010.
  86. Q. Zhou, X. Ma, and R. Rice, “Near-ML Detection Based on Semi-definite Programming for UWB Communications,”in Proc. IEEE International Symposium on Information Theory (ISIT), Austin, TX, Jun. 13–18, 2010.
  87. B. R. Hamilton, X. Ma, R. J. Baxley, and B. Walkenhorst, “Node Localization and Tracking Using Distance and Acceleration Measurements,” in Proc. IEEE Cognitive Information Processing, Tuscany, Italy, Jun. 14-16, 2010.
  88. Q. Zhou, X. Ma, and R. Rice, “A near-optimal multi-symbol based detector for UWB communications,”’ in Proc. IEEE Int. Conf. Ultra-Wideband, (ICUWB), Nanjing, China, vol. 1, Sep. 20–24, 2010, pp. 1–4.
  89. Y. Wang, X. Ma, and G. Leus, “An UWB ranging-based localization strategy with internal attack immunity,” in Proc. IEEE Int. Conf. Ultra-Wideband, (ICUWB), Nanjing, China, vol. 1, Sep. 20–24, 2010, pp. 1–4.
  90. Q. Zhou, J. Chen, and X. Ma, “Extended Multi-Symbol Differential Detection for IR-UWB Communications,” in Proc. IEEE Military Communications Conference, pp. 2387–2392, San Jose, CA, Oct. 31-Nov. 3, 2010.
  91. W. Zhang, G. Choi, and X. Ma, “Designing Zero-Forcing Based MIMO relay networks with Channel Controlled ARQ to achieve full diversity,” in Proc. IEEE Military Communications Conference, pp. 363-368, San Jose, CA, Oct. 31-Nov. 3, 2010.
  92. M. Shinostuka, X. Ma, and G. T. Zhou, “Performance Comparisons of Power Loaded OFDM Systems Over Peak Power Limited Channels,” in Proc. IEEE Military Communications Conference, pp. 1632-1637, San Jose, CA, Oct. 31-Nov. 3, 2010.
  93. H. Kim, X. Ma, and B. R. Hamilton, “Modeling and Tracking Clocks with Time-Varying Skews Using Information Criteria,” in Proc. IEEE Military Communications Conference, San Jose, CA, Oct. 31-Nov. 3, 2010.
  94. J. Kleider, D. Morris, H.-Q. Lai, X. Ma, B. R. Hamilton, B. Zannetti, C. Steenhoek, and T. Chin, “Achieving MIMO Performance With Single-Antenna Radios,” in Proc. IEEE Military Communications Conference, pp. 814–819, San Jose, CA, Oct. 31-Nov. 3, 2010.
  95. G. Choi, W. Zhang, and X. Ma, “Achieving Joint Diversity in MIMO Relay Networks with Low-Complexity Equalizers,” in Proc. the 44th Asilomar Conference on Signals, Systems, and Computers, pp. 363–368, Pacific Grove, CA, Nov. 7-10, 2010.
  96. S. Lee and X. Ma, “An Improved Synchronization Scheme for OFDMA Systems with Initial Ranging Transmissions,” in Proc. the 44th Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 7-10, 2010.
  97. M. M. U. Gul, S. Lee, and X. Ma, “Null sub-carrier based carrier frequency offset estimation for OFDMA uplink systems,”in Proc. IEEE Signal Processing Society 14th DSP Workshop & 6th SPE Workshop, Sedona, AZ, Jan. 4-7, 2011.
  98. A. Y. Yazicioglu, X. Ma, and Y. Altunbasak, “Evolution of Mixed Strategies for Social Dilemmas on Structured Networks,” in Proc. IEEE International Conference on Networking, Sensing and Control, Delft, the Netherlands, April 11-13, 2011.
  99. H. Kim and X. Ma, “Clock Skew Estimation without Exchanging Timestamps,” in Proc. 45th Annual Conference on Information Sciences and Systems, Johns Hopkins University, Mar. 23-25, 2011.
  100. Q. Zhou and X. Ma, “Designing Low-Complexity Detectors for Generalized SC-FDMA Systems,” in Proc. 45th Annual Conference on Information Sciences and Systems, Johns Hopkins University, Mar. 23-25, 2011.
  101. J. Xiao, X. Ma, and S. W. McLaughlin, “Random Complex Field Code Design for Security over Wiretap Channels,” in Proc. 45th Annual Conference on Information Sciences and Systems (CISS), Johns Hopkins University, Mar. 23-25, 2011.
  102. Q. Zhou, X. Ma, and V. Lottici, “Generalized Code-Multiplexing Transmissions for UWB Systems,” in Proc. 45th Annual Conference on Information Sciences and Systems (CISS), Johns Hopkins University, Mar. 23 25, 2011.
  103. A. Y. Yazicioglu, X. Ma, and Y. Altunbasak, “Evolution of mixed strategies for social dilemmas on structured Networks,” in Proc. IEEE International Conf. on Networking, Sensing and Control (ICNSC), Delft, Netherlands, Apr. 11–13, 2011.
  104. S. Lee and X. Ma, “Timing adjustment techniques to mitigate interference between multiple nodes in OFDMA mesh networks,” in Proc. IEEE International Conf. on Acoustics, Speech and Signal Processing (ICASSP), Czech Republic, pp. 3508–3511, May 22–27, 2011.
  105. B. Gestner, X. Ma, and D. V. Anderson, “Are all basis updates for lattice-reduction-aided MIMO detection necessary?,” in Proc. IEEE International Conf. on Acoustics, Speech and Signal Processing (ICASSP), Czech Republic, pp. 3280–3283, May 22–27, 2011.
  106. Y. Wang, G. Leus and X. Ma, “Time-based Localization for Asynchronous Wireless Sensor Networks,” in Proc. IEEE International Conf. on Acoustics, Speech and Signal Processing (ICASSP), Prague, Czech Republic, pp. 3284–3287, May 22–27, 2011.
  107. Y. Wang, G. Leus, and X. Ma, “Tracking a Mobile Node by Asynchronous Networks,” in Proc. IEEE SPAWC, pp. 1513–1518, San Francisco, CA, USA, Jun. 2011.
  108. B. R. Hamilton, X. Ma, R. Baxley, “SAL: Shadowing Assisted Localization,” in Proc. IEEE Workshop on tatistical Signal Processing, pp. 229–232, Nice, France, June 28–30, 2011.
  109. Q. Zhou and X. Ma, “Receiver designs for UWB differential transmitted reference systems with multiple access interference,” in Proc. IEEE International Conference on Ultra-Wideband (ICUWB), pp. 205–209, Bologna, Italy, Sept. 14–16, 2011.
  110. S. Lee and X. Ma, “Symbol Detection on Asynchronous OFDMA Mesh Networks with Timing Misalignment,” in Proc. IEEE Military Communications Conference, pp. 2188–2193, Baltimore, MD, Nov. 7–10, 2011.
  111. M. M. U. Gul, S. Lee, and X. Ma, “Which One is More Sensitive to Carrier Frequency Offsets OFDMA or SC-FDMA?,” in Proc. IEEE Military Communications Conference, pp. 2194–2199, Baltimore, MD, Nov. 7–10, 2011.
  112. B. R. Hamilton, X. Ma, and R. J. Baxley, “Efficient Node Self-Localization in Large Ad-Hoc Wireless Networks Using Interlaced Particle Filters,” in Proc. IEEE Military Communications Conference, pp. 780–785, Baltimore, MD, Nov. 7–10, 2011.
  113. Y. Wang, X. Ma, and G. Leus, “Robust Time-Based Localization for Asynchronous Networks with Clock Offsets,” in Proc. Asilomar Conf. on Signals, Systems, and Computers, pp. 1513 – 1518, Pacific Grove, CA, USA, Nov. 2011.
  114. Q. Zhou and X. Ma, “Robust Designs for Femtocell Networks with Interference From Macrocell Users,” in Proc. the 2nd IEEE GLOBECOM Workshop on Femtocell Networks (FEMnet), pp. 214–218, Houston, TX, Dec. 5, 2011.
  115. G. Choi, S. Lee, and X. Ma, “Enhancing data persistence of wireless networks: Where NeMo meets OFDM,” in Proc. 46th International Conference on Information Sciences and Systems (CISS), pp. 1–6, Princeton, NJ, Mar. 21-23, 2012.
  116. M. M. U. Gul, S. Lee, and X. Ma, ”Carrier frequency offset estimation for interleaved SC-FDMA systems,” in Proc. 46th International Conference on Information Sciences and Systems (CISS), Princeton, NJ, Mar. 21-23, 2012.
  117. M. M. U. Gul, S. Lee, and X. Ma, ”Robust synchronization for OFDM employing Zadoff-Chu sequence,” in Proc. 46th International Conference on Information Sciences and Systems (CISS), Princeton, NJ, Mar. 21-23, 2012.
  118. M. Mondelli, Q. Zhou, X. Ma, and V. Lottici, “A cooperative approach for amplify-and-forward differential transmitted reference IR-UWB relay systems,” in Proc. IEEE International Conf. on Acoustics, Speech and Signal Processing (ICASSP), pp. 2905– 2908, Kyoto, Japan, Mar. 25–30, 2012.
  119. B. R. Hamilton, X. Ma, R. J. Baxley, and S. M. Matechik, “Radio frequency tomography in mobile networks,” in Proc. IEEE Statistical Signal Processing Workshop (SSP), pp. 508–511, Ann Arbor, MI, Aug. 5–8, 2012.
  120. Q. Zhou, J. Pan, X. Ma, and S. E. Ralph, “Lattice-reduction-aided Wiener filtering for communications over ISI channels,” in Proc. IEEE International Conf. on Signal Processing (ICSP), pp. 1477-1481, Beijing, China, Oct. 20-23, 2012 .
  121. Y. Wang, G. Leus, and X. Ma, “Tracking an Asynchronous Sensor with Kalman Filters,” in Proc. IEEE Wireless Communications and Signal Processing, Huangshan, China, Oct. 25-27, 2012.
  122. Q. Zhou and X. Ma, “An improved LR-aided K-best algorithm for MIMO detection,” in Proc. IEEE Wireless Communications and Signal Processing, Huangshan, China, Oct. 25-27, 2012.
  123. Q. Wen, S. Lee, and X. Ma, ”Clipping effect on radiation pattern in downtilt beamforming,” in Proc. the 46th Asilomar Conference on Signals, Systems, and Computers, pp. 1873-1877, Pacific Grove, CA, Nov. 4-7, 2012.
  124. S. Lee, X. Ma, and Q. Wen, “Transmitter-side timing adjustment to mitigate interference between multiple nodes for OFDMA mesh network,” in Proc. the 46th Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 4-7, 2012.
  125. Z. Yu, X. Ma, and G. T. Zhou, “An Analytical Framework for Transmit Beamforming with Peak Power Constraint,” in Proc. the 46th IEEE Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 4-7, 2012.
  126. B. Beck, R. J. Baxley, and X. Ma, “Improving Radio Tomographic Images using multipath signals,” in Proc. 2012 IEEE International Conf. on Wireless Information Technology and Systems (ICWITS), pp. 1–4, Maui, HI, Nov. 11-16, 2012.
  127. Y. Wang, M. Shinotsuka, X. Ma, and M.Tao, “Design an asynchronous radio interferometric positioning, system using dual-tone signaling,” in Proc. IEEE Wirelessm Communications and Networking Conference, Shanghai, China, Apr. 14–17, 2013.
  128. J. Mo, M. Tao, Y. Liu, B. Xia, and X. Ma, “Secure Beamforming for MIMO Two-Way Transmission with an Untrusted Relay,” in Proc. IEEE Wireless Communications and Networking Conference, Shanghai, China, Apr. 14–17, 2013.
  129. Q. Wen, Q. Zhou, C. Zhao, and X. Ma, “Fixed-point realization of Lattice-reduction aided MIMO receivers with complex K-best algorithm,” in Proc. International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, May 26 - 31, 2013.
  130. Q. Zhou and X. Ma, “Joint transceiver designs using lattice reduction algorithms,” in Proc. China Summit and Int. Conf. on Signal and Info. Process. (ChinaSIP), July 2013.
  131. H. Kim, H. Zang, and X. Ma, “Analyzing and modeling temporal patterns of human contacts in cellular networks,” in Proc. the 22nd International Conf. on Computer Comm. and Networks, Nassau, Bahamas, July 30 - Aug. 2, 2013.
  132. Y. Wang and X. Ma, “Detecting UWB Signals Using Cyclic Features,” in Proc. International Conf. on UWB, Sydney, Australia, Sept. 15-18, 2013.
  133. H. Cho, Q. Zhou, and X. Ma, “Maximum Likelihood Detectors for Generalized Code-Multiplexing Ultra-Wideband Systems,” in Proc. International Conf. on UWB, Sydney, Australia, Sept. 15-18, 2013.
  134. B. Beck, R. Baxley, and X. Ma, “Regularization Techniques for Floor Plan Estimation in Radio Tomographic Imaging,” in Proc. IEEE the First Global Signal and Information Processing (GlobalSIP), Austin, TX, Dec. 3-5, 2013.
  135. S. Lee and X. Ma, “Network Modulation (NeMo)-aided OFDM incremental relay systems,” in Proc. IEEE Global Comm. Conf. (Globecom), Atlanta, GA, Dec. 9-13, 2013.
  136. M. Shinoksuka, Y. Wang, X. Ma, and G. T. Zhou, “Designing Radio Interferometric Positioning Systems for Indoor Localizations in Millimeter Wave Bands,” in Proc. IEEE Milcom, Oct. 2014, submitted.
  137. Q. Zhou and X. Ma, “Hardware Realizable Lattice-Reduction-Aided Detectors for Large-Scale MIMO Systems,” in Proc. the 22nd European Signal Processing Conference, Lisbon, Portugal, Sept. 1–5, 2014. (invited)
  138. H. J. Rad, A. Simonetto, X. Ma, and G. Leus,“Sparsity-Aware Sensor Selection for Correlated Noise,” in Proc. IEEE the 17th International Conference on Information Fusion, Salamanca, July 7-10, 2014.
  139. M. Shinotsuka, Y. Wang, X. Ma, and G. T. Zhou, “Designing Radio Interferometric Positioning Systems with Undersampling Techniques,” in Proc. Military Communications Conference, Baltimore, MD, Oct. 6-8, 2014.
  140. H. Cho and X. Ma, “Detecting UWB Radar signals with UWB communication interference,” in Proc. Military Communications Conference, Baltimore, MD, Oct. 6-8, 2014.
  141. Q. Wen and X. Ma,“An Efficient Greedy LLL Algorithm for MIMO Detection,” in Proc. Military Communications Conference, Baltimore, MD, Oct. 6-8, 2014.
  142. Y. Kong, X. Ma, and Q. Zhou, “Joint Linear Transceiver Design for Multiuser MIMO Downlink Using Lattice Reduction Algorithms,” in Proc. Military Communications Conference, Baltimore, MD, Oct. 6-8, 2014.
  143. Y. Kong and X. Ma, “Lattice Reduction Techniques in MIMO Systems with Correlated Channels,” in Proc. Military Communications Conference, Baltimore, MD, Oct. 6-8, 2014.
  144. L. Li, Y. Wang, X. Ma, C. Chen, and X. Guan, “An improved LR-aided K-best algorithm for MIMO detection,” in Proc. IEEE/CIC International Conference on Communications in China, Shanghai, China, Oct. 13-15, 2014.
  145. M. Shinotsuka and X. Ma, “Designing Radio Interferometric Positioning Systems for Indoor Localizations in Millimeter Wave Bands,” in Proc. Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2-5, 2014.
  146. Q. Wen, Q. Zhou, and X. Ma, “An Enhanced Fixed-Complexity LLL Algorithm for MIMO Detection,” in Proc. the IEEE Global Communications Conference (Globecom), Austin, TX, Dec. 8-12, 2014.
  147. F. Lu, L. Cheng, M. Zhu, J. Wang, M. Xu, X. Ma, and G. K. Chang, “Generalized Frequency Division Multiplexing for Photonic-Assisted Millimeter-Wave Carrier Aggregation,” in Proc. Optical Fiber Communication Conference and Exposition (OFC), Los Angeles, CA, USA, Mar. 22-26, 2015.
  148. L. Cheng, M. Gul, A. Ng’oma, X. Ma, and G. K. Chang, “High-Diversity Millimeter-Wave CoMP Transmission based on Centralized SFBC in Radio-over-Fiber Systems,” in Proc. Optical Fiber Communication Conference and Exposition (OFC), Los Angeles, CA, USA, Mar. 22-26, 2015.
  149. Shinotsuka, M., Cheng, L., Ma, X., Chang, G. K., and Zhou, G. T., “Hardware implementation of the space-time radio interferometric positioning system,” in Proc. IEEE IWS, Shenzhen, China, Mar. 2015.
  150. Y. Xia, Y. Wang, X. Ma, C. Chen, and X. Guan, “Joint Time Synchronization and Localization for Underwater Acoustic Sensor Networks,” in Proc. ACM International Conference on Underwater Networks and Systems, Oct. 22-25, 2015.
  151. X. Ma and Y. Kong, “Capacity Analysis of Lattice Reduction Aided Equalizers for MIMO Systems,” in Proc. IEEE Military Communications Conference, Oct. 27, 2015.
  152. H. Cho and X. Ma, “Threshold Estimation for UWB Single Pulse Radar,” in Proc. IEEE Military Communications Conference, Oct. 27, 2015.
  153. J. Krier, M. Norko, A. Lanterman, R. Baxley, J. Reed, X. Ma, and J. Barry, “Performance Bounds for an OFDM-Based Joint Radar and Communications System,” in Proc. IEEE Military Communications Conference, Oct. 27, 2015.
  154. L. Cheng, M. Xu, F. Lu, J. Wang, J. Zhang, X. Ma, G. K. Chang, “Millimeter-Wave Cell Grouping for Optimized Coverage based on Radio-over-Fiber and Centralized Processing,” in Proc. Optical Fiber Communication Conference and Exposition (OFC), Mar. 2016.
  155. Q. Wen and X. Ma, “Fixed-Complexity Variants of the Effective LLL Algorithm with Greedy Convergence For MIMO Detection,” in Proc. IEEE ICASSP, Mar 20-25, 2016
  156. Q. Wen and X. Ma, “VLSI Implementation of Incremental Fixed-Complexity LLL Lattice Reduction for MIMO Detection,” in Proc. IEEE ISCAS, May 2016.
  157. J. Wang, Z. Yu, K. Ying, J. Zhang, F. Lu, M. Xu, L. Cheng, X. Ma, and G.-K. Chang, “10-Gbaud OOK/ PAM4 Digital Mobile Fronthaul based on One-Bit / Two-bit Delta-Sigma Modulation Supporting Carrier Aggregation of 32 LTE-A Signals,” in Proc. 42nd European Conference on Optical Communication, 2016.
  158. B. Beck, R. J. Baxley, and X. Ma, “Uncooperative RSS-based emitter localization in uncalibrated mobile networks,” in Proc. IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Aug. 2016.
  159. Y. Kong, H. Zang, and X. Ma, “Human network usage patterns revealed by telecom data,” in Proc. IEEE International Conference on Big Data (Big Data), pp. 1621–1626, Dec. 2016.
  160. Y. Kong, H. Zang, and X. Ma, “Quick model fitting using a classifying engine,” in Proc. IEEE International Conference on Big Data (Big Data), pp. 2728–2733, Dec. 2016.
  161. H. Cho, Y. Yan, G. K. Chang, and X. Ma, “Asynchronous multi-user uplink transmissions for 5G with UFMC waveform,” in Proc. IEEE Wireless Communications and Networking Conference (WCNC), San Francisco, CA, 2017, pp. 1–5.
  162. H. J. Cho, H. Cho, X. Mu, F. Lu, S. Shen, X. Ma, and G. K. Chang, “Asynchronous transmission using universal filtered multicarrier for multiservice applications in 5G fiber-wireless integrated mobile fronthaul,” in Proc. 2018 Optical Fiber Communications Conference and Exposition (OFC), Mar. 2018, pp. 1-3.
  163. R. Zhang, Y. Kong, X. Ma, D. Wang, “Adaptive Video Transmission Designs Over Underwater Acoustic Channels,” in Proc. International Conference on Computing, Networking and Communications (ICNC), Mar. 2018.
  164. Y. Kong, X. Ma, Y. Wang, “Applying Lattice Reduction Technique to Space-Time Coded Multiplexing Systems,” in Proc. International Conference on Computing, Networking and Communications (ICNC), March 2018.
  165. Y. Kong, H. Zang, and X. Ma, “Improving TCP Congestion Control with Machine Intelligence,” in Proc. ACM SIGCOMM 2018 Work- shop on Network Meets AI & ML , Budapest, Hungary, Aug. 2018.
  166. X. Ma, H. Ye, and Y. Li, “Learning Assisted Estimation for Time-Varying Channels,” in Proc. 2018 15th International Symposium on Wireless Communication Systems (ISWCS), Lisbon, Portugal, Aug. 2018.
  167. C.-H. Yang, Y.-C. Liu, P.-Y. Chen, and X. Ma, “When Causal Intervention Meets Adversarial Examples and Image Masking for Deep Neural Networks,” in Proc. the 26th IEEE International Conference on Image Processing (ICIP), Taipei, Taiwan, Sept. 2019.
  168. M. S. Omar and X. Ma, “Designing OCDM-Based Multi-User Transmissions,” in Proc. IEEE Globecom, Dec. 2019.
  169. J. Qi, X. Ma, C.-H. Lee, J. Du, and S. M. Siniscalchi, “Performance Analysis for Tensor-Train Decomposition to Deep Neural Network Based Vector-to-Vector Regression,” in Proc. the 54th Annual Conference on Information Sciences and Systems, Princeton, NJ, Mar. 2020.
  170. H. Wu, X. Ma, C.-H. Yang, and S. Liu, “Learning to measure and discover visual treatment by causal attention network,” in Proc. the 54th Annual Conference on Information Sciences and Systems, Princeton, NJ, Mar. 2020.
  171. C.-H. Yang, J. Qi, P.-Y. Chen, X. Ma, and C.-H. Lee,“Characterizing adversarial speech examples using self-attention U-Net enhancement,” in Proc. IEEE ICASSP, Barcelona, Spain, May 2020.
  172. C.-H. Yang, J. Qi, P.-Y. Chen, X. Ma, and C.-H. Lee,“Enhanced Adversarial,Strategically-Timed Attacks against Deep Reinforcement Learning,” in Proc. IEEE ICASSP, Barcelona, Spain, May 2020.
  173. S. Zhang and X. Ma, “A general difficulty control algorithm for proof-of-work based blockchains,” in Proc. IEEE ICASSP, Barcelona, Spain, May 2020.
  174. K. Zheng, S. Zhang, and X. Ma, “Difficulty Prediction for Proof-of-Work Based Blockchains,” in Proc. IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Atlanta, GA, May 2020.
  175. J. Zhang, T. He, X. Yang, C.-K. Wen, S. Jin, and X. Ma, “Model-driven Deep Learning Based TurboMIMO Receiver,” in Proc. IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Atlanta, GA, May 2020.
  176. M. S. Omar and X. Ma, “The Effects of Narrowband Interference on OCDM,” in Proc. IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Atlanta, GA, May 2020.
  177. M. S. Omar and X. Ma, “Mitigating Clipping Distortion in OFDM Using Deep Residual Learning,” in Proc. IEEE ICASSP, June 2021.
  178. C.-H. Yang, J. Qi, P.-Y. Chen, Y.-C. S. Chen, S. M. Siniscalchi, X. Ma, and C.-H. Lee, “Decentralizing Feature Extraction with Quantum Convolutional Neural Network for Automatic Speech Recognition,” in Proc. IEEE ICASSP, June 2021.
  179. L. Yan, X. Ma and X. Li, “Diversity-Oriented Grant-Free Transmissions for Underwater Wireless Networks,” in Proc. IEEE/CIC International Conference on Communications in China (ICCC Workshops), Oct. 2021, pp. 309-314.