Publications

X. Yu, C. Li, J. Zhang, and K. B. Letaief, Stochastic Geometry Analysis of Multi-Antenna Wireless Networks, Springer, 2019. [Book Website]

D. Xu, X. Yu, Y. Sun, D. W. K. Ng, and R. Schober, “Resource allocation for IRS-assisted full-duplex cognitive radio systems,” accepted to IEEE Trans. Commun., Aug. 2020. [Paper]

X. Yu, D. Xu, Y. Sun, D. W. K. Ng, and R. Schober, “Robust and secure wireless communications via intelligent reflecting surfaces,” accepted to IEEE J. Sel. Areas Commun., Special Issue on Wireless Networks Empowered by Reconfigurable Intelligent Surfaces, to appear. [Paper]

J. Zhang, X. Yu, and K. B. Letaief, “Hybrid beamforming for 5G and beyond millimeter-wave systems: A holistic view,” IEEE Open J. Commun. Soc., vol. 1, pp. 77-91, Dec. 2019. (Invited Paper) [Paper]

X. Yu, J. Zhang, and K. B. Letaief, “Doubling phase shifters for efficient hybrid precoding in millimeter-wave multiuser OFDM systems,” J. Commun. Inf. Netw., vol. 4, no. 2, pp. 51-67, July 2019. [Paper]

X. Yu, C. Li, J. Zhang, M. Haenggi, and K. B. Letaief, “A unified framework for the tractable analysis of multi-antenna wireless networks,” IEEE Trans. Commun., vol. 17, no. 12, pp. 7965-7980, Dec. 2018. [Paper]

X. Yu, J. Zhang, and K. B. Letaief, “A hardware-efficient analog network structure for hybrid precoding in millimeter wave systems,” IEEE J. Sel. Topics Signal Process., Special Issue on Hybrid Analog-Digital Signal Processing for Hardware-Efficient Large Scale Antenna Arrays, vol. 12, no. 2, pp. 282-297, May 2018. [Paper] [Codes]

X. Yu, J. Zhang, M. Haenggi, and K. B. Letaief, “Coverage analysis for millimeter wave networks: The impact of directional antenna arrays,” IEEE J. Sel. Areas Commun., Special Issue on Millimeter Wave Communications for Future Mobile Networks, vol. 35, no. 7, pp. 1498-1512, July 2017. [Paper]

X. Yu, J.-C. Shen, J. Zhang, and K. B. Letaief, “Alternating minimization algorithms for hybrid precoding in millimeter wave MIMO systems,” IEEE J. Sel. Topics Signal Process., Special Issue on Signal Processing for Millimeter Wave Wireless Communications, vol. 10, no. 3, pp. 485-500, Apr. 2016. (2018 IEEE Signal Processing Society Young Author Best Paper Award) (ESI Highly Cited Paper) (Top 25 downloaded article in 2019) [Paper] [Codes]

Y. Ma, Y. Shen, X. Yu, J. Zhang, S.H. Song, and K. B. Letaief, “A low-complexity algorithmic framework for large-scale IRS-assisted wireless systems,” submitted to IEEE Global Commun. Conf. Wkshps. (GLOBECOM Wkshps), Taiwan, Dec. 2020. [Paper]

X. Yu, D. Xu, Y. Sun, D. W. K. Ng, and R. Schober, “Power-efficient resource allocation for multiuser MISO systems via intelligent reflecting surfaces,” in Proc. IEEE Global Commun. Conf. (GLOBECOM), Taiwan, Dec. 2020. [Paper]

T. Lin, X. Yu, Y. Zhu, and R. Schober, “Channel estimation for intelligent reflecting surface-assisted millimeter wave MIMO systems,” in Proc. IEEE Global Commun. Conf. (GLOBECOM), Taiwan, Dec. 2020. [Paper]

D. Xu, X. Yu, and R. Schober, “Resource allocation for intelligent reflecting surface-assisted cognitive radio networks,” in Proc. IEEE Int. Workshop Signal Process. Adv. Wireless Commun. (SPAWC), Atlanta, GA, USA, May 2020, pp. 1-5. (Invited Paper) [Paper]

X. Yu, D. Xu, and R. Schober, “Optimal beamforming for MISO communications via intelligent reflecting surfaces,” in Proc. IEEE Int. Workshop Signal Process. Adv. Wireless Commun. (SPAWC), Atlanta, GA, USA, May 2020, pp. 1-5. (Invited Paper) [Paper]

D. Xu, X. Yu, and R. Schober, “Resource allocation for secure IRS-assisted multiuser MISO systems,” in Proc. IEEE Global Commun. Conf. Wkshps. (GLOBECOM Wkshps), Waikoloa, HI, USA, Dec. 2019, pp. 1-6. [Paper]

X. Yu, D. Xu, and R. Schober, “Enabling secure wireless communications via intelligent reflecting surfaces,” in Proc. IEEE Global Commun. Conf. (GLOBECOM), Waikoloa, HI, USA, Dec. 2019, pp. 1-6. (Best Paper Award) [Paper]

X. Yu, D. Xu, and R. Schober, “MISO wireless communication systems via intelligent reflecting surfaces,” in Proc. IEEE/CIC Int. Conf. Commun. China (ICCC), Changchun, China, Aug. 2019, pp. 735-740. (Invited Paper) [Paper]

X. Yu, J. Zhang, R. Schober, and K. B. Letaief, “A tractable framework for coverage analysis of cellular-connected UAV networks,” in Proc. IEEE Int. Conf. Commun. Wkshps. (ICC Wkshps), Shanghai, China, May 2019, pp. 1-6.

X. Yu, J. Zhang, and K. B. Letaief, “Hybrid precoding in millimeter wave systems: How many phase shifters are needed?” in Proc. IEEE Global Commun. Conf. (GLOBECOM), Singapore, Dec. 2017, pp. 1-6. (Best Paper Award) [Paper]

X. Yu, J. Zhang, and K. B. Letaief, “Partially-connected hybrid precoding in mm-wave systems with dynamic phase shifter networks,” in Proc. IEEE Int. Wkshp. Signal Process. Adv. Wireless Commun. (SPAWC), Sapporo, Japan, July 2017, pp. 129-133.

X. Yu, C. Li, J. Zhang, and K. B. Letaief, “A tractable framework for performance analysis of dense multi-antenna networks,” in Proc. IEEE Int. Conf. Commun. (ICC), Paris, France, May 2017, pp. 1-6.

X. Yu, J. Zhang, and K. B. Letaief, “Alternating minimization for hybrid precoding in multiuser OFDM mmWave Systems,” in Proc. 50th Asilomar Conf. on Signals, Systems, Computers, Pacific Grove, CA, USA, Nov. 2016, pp. 281-285. (Invited Paper) [Paper]

X. Yu, J. Zhang, and K. B. Letaief, “Coverage analysis for dense millimeter wave cellular networks: The impact of array size,” in Proc. IEEE Wireless Commun. Netw. Conf. (WCNC), Doha, Qatar, Apr. 2016, pp. 1-6.

X. Yu, J.-C. Shen, J. Zhang, and K. B. Letaief, “Hybrid precoding design in millimeter wave MIMO systems: An alternating minimization approach,” in Proc. IEEE Global Commun. Conf. (GLOBECOM), San Diego, CA, USA, Dec. 2015, pp. 1-6.