Publications

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Book Chapter:

1. L. Liu, W. Yu, and O. Simone, “Fronthaul-aware design for cloud radio-access networks,” in the chapter of Emerging Technologies for 5G Wireless Systems, Cambridge University Press, 2017. (Book URL)
2. L. Liu, J. Xu, and R. Zhang, “Transmit beamforming for simultaneous wireless information and energy transfer,” in the chapter of Library in Signal Processing, New York: Academic Press, 2017. (Book URL)

Journal Paper:

1. L. Liu, R. Zhang, and K. C. Chua, “Achieving global optimality for weighted sum-rate maximization in the K-user Gaussian interference channel with multiple antennas,” IEEE Trans. Wireless Commun., vol. 11, no. 5, pp. 1933-1945, May 2012.
2. L. Liu, R. Zhang, and K. C. Chua, “Wireless information transfer with opportunistic energy harvesting,” IEEE Trans. Wireless Commun., vol. 12, no. 1, pp. 288-300, Jan. 2013. ESI Highly Cited Paper
3. L. Liu, R. Zhang, and K. C. Chua, “Wireless information and power transfer: a dynamic power splitting approach,” IEEE Trans. Commun., vol. 61, no. 9, pp. 3990-4001, Sep. 2013. ESI Highly Cited Paper
4. L. Liu, R. Zhang, and K. C. Chua, “Secrecy wireless information and power transfer with MISO beamforming,” IEEE Trans. Signal Process., vol. 62, no. 7, pp. 1850-1863, Apr. 2014. ESI Highly Cited Paper
5. Q. Shi, L. Liu, W. Xu, and R. Zhang, “Joint transmit beamforming and receive power splitting for MISO SWIPT systems,” IEEE Trans. Wireless Commun., vol. 13, no. 6, pp. 3269-3280, Jun., 2014. ESI Highly Cited Paper
6. J. Xu, L. Liu, and R. Zhang, “Multiuser MISO beamforming for simultaneous wireless information and power transfer,” IEEE Trans. Signal Process., vol. 62, no. 18, pp. 4798-4810, Aug. 2014. 2017 IEEE Signal Processing Society Young Author Best Paper Award, ESI Highly Cited Paper
7. L. Liu, R. Zhang, and K. C. Chua, “Multi-antenna wireless powered communication with energy beamforming,” IEEE Trans. Commun., vol. 62, no. 12, pp. 4349-4361, Dec. 2014. ESI Highly Cited Paper
8. S. Lee, L. Liu, and R. Zhang, “Collaborative wireless energy and information transfer in interference channel,” IEEE Trans. Wireless Commun., vol. 14, no. 1, pp. 545-557, Jan. 2015.
9. L. Liu, and R. Zhang, “Optimized uplink transmission in multi-antenna C-RAN with spatial compression and forward,” IEEE Trans. Signal Process., vol. 63, no. 19, pp. 5083-5095, Oct. 2015.
10. L. Liu, S. Bi, and R. Zhang, “Joint power control and fronthaul rate allocation for throughput maximization in OFDMA-based cloud radio access network,” IEEE Trans. Commun., vol. 63, no. 11, pp. 4097-4110, Nov. 2015.
11. H. Xing, L. Liu, and R. Zhang, “Secrecy wireless information and power transfer in fading wiretap channel,” IEEE Trans. Veh. Technol., vol. 65, no. 1, pp. 180-190, Jan. 2016. ESI Highly Cited Paper
12. L. Liu, and R. Zhang, “How to diagonalize a MIMO channel with arbitrary transmit covariance?” IEEE Wireless Commun. Lett., vol. 5, no. 4, pp. 352-355, Aug. 2016.
13. L. Liu, and W. Yu, "Cross-layer design for downlink multihop cloud radio access networks with network coding," IEEE Trans. Signal Process., vol. 65, no. 7, pp. 1728-1740, Apr. 2017.
14. L. Liu, and W. Yu, “Massive connectivity with massive MIMO-Part I: Device activity detection and channel estimation,” IEEE Trans. Signal Process., vol. 66, no. 11, pp. 2933-2946, Jun. 2018.
15. L. Liu, and W. Yu, “Massive connectivity with massive MIMO-Part II: Achievable rate characterization,” IEEE Trans. Signal Process., vol. 66, no. 11, pp. 2947-2959, Jun. 2018.
16. L. Liu, P. Patil, and W. Yu, "Channel diagonalization for cloud radio access," IEEE Wireless Commun. Lett., vol. 7, no. 4, pp. 622-625, Aug. 2018.
17. L. Liu, and W. Yu, “A D2D-based protocol for ultra-reliable wireless communications for industrial automation,” IEEE Trans. Wireless Commum., vol. 17, no. 8, pp. 5045-5058, Aug. 2018.
18. L. Liu, E. G. Larsson, W. Yu, P. Popovski, C. Stefanovic, and E. de Carvalho, “Sparse signal processing for grant-free massive connectivity: A future paradigm for random access protocols in the Internet of Things,” IEEE Signal Process. Mag., vol. 35, no. 5, pp. 88-99, Sep. 2018.
19. L. Liu, S. Zhang, and R. Zhang, "CoMP in the sky: UAV placement and movement optimization for multi-user communications,'' to appear in IEEE Trans. Commun., 2018.
20. Q. Wu, L. Liu, and R. Zhang, "Fundamental trade-offs in communication and trajectory design for UAV-enabled wireless network," IEEE Wireless Commun., vol. 26, no. 1, pp. 36-44, Feb. 2019.
21. L. Liu, S. Zhang, and R. Zhang, "Multi-beam UAV communication in cellular uplink: cooperative interference cancellation and sum-rate maximization,'' submitted to IEEE Trans. Wireless Commun., 2018.

Conference Paper:

1. L. Liu, R. Zhang, and K. C. Chua, “A new approach to weighted sum-rate maximization for the K-user Gaussian interference channel,” in Proc. IEEE International Conference on Wireless Communications and Signal Processing (WCSP), Nanjing, China, 2011. (Best Student Paper Award)
2. L. Liu, R. Zhang, and K. C. Chua, “Wireless information transfer with opportunistic energy harvesting,” in Proc. IEEE International Symposium on Information Theory (ISIT), Cambridge, MA, America, 2012.
3. L. Liu, R. Zhang, and K. C. Chua, “Secrecy wireless information and power transfer with MISO beamforming,” in Proc. IEEE Global Communications Conference (Globecom), Atlanta, America, 2013.
4. J. Xu, L. Liu, and R. Zhang, “Multiuser MISO beamforming for simultaneous wireless information and power transfer,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, BC, Canada, 2013.
5. H. Xing, L. Liu, and R. Zhang, “Secrecy wireless information and power transfer in fading wiretap channel,” in Proc. IEEE International Conference on Communications (ICC), Sydney, Australia, 2014.
6. L. Liu, and R. Zhang, “Downlink SINR balancing in C-RAN under limited fronthaul capacity,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Shanghai, China, 2016.
7. L. Liu, P. Patil, and W. Yu, “An uplink-downlink duality for cloud radio access network,” in Proc. IEEE International Symposium on Information Theory (ISIT), Barcelona, Spain, 2016.
8. L. Liu, and W. Yu, “Joint sparse beamforming and network coding for downlink multi-hop cloud radio access networks,” in Proc. IEEE Global Communications Conference (Globecom), Washington D.C., America, 2016.
9. L. Liu, and W. Yu, “Massive device connectivity with massive MIMO,” in Proc. IEEE International Symposium on Information Theory (ISIT), Aachen, Germany, 2017.
10. H. Xing, L. Liu, J. Xu, and A. Nallanathan, "Joint task assignment and wireless resource allocation for cooperative mobile-edge computing," in Proc. IEEE International Conference on Communications (ICC), Kansas, America, 2018.
11. L. Liu, S. Zhang, and R. Zhang, "Cooperative interference cancellation for multi-beam UAV uplink communication: A DoF analysis," in Proc. IEEE Global Communications Conference (Globecom) Workshops, Abu Dhabi, the United Arab Emirates, 2018.
12. L. Liu, S. Zhang, and R. Zhang, "Exploiting NOMA for multi-beam UAV communication in cellular uplink," to appear in Proc. IEEE International Conference on Communications (ICC), 2019.