PhD, Hong Kong Univ of Sci & Tech

Associate Professor

Email: xingkong星空中国官网r@sustc.edu.cn

Research Interests

◆ Stochastic Optimization xingkong星空中国官网 Wireless Systems, Delay-Sensitive Resource Allocation, Robust Cross-layer Optimization with Imperfect CSIT.

◆ Signal Processing xingkong星空中国官网 Large-Scale MIMO Systems, Interference Mitigation Technology.

◆ Heterogeneous Networks, Cooperative Communication and Network MIMO, Cognitive Radio.

My current research interests are focused on advances xingkong星空中国官网 several promising technologies for future wireless systems. Some of the major research areas are elaborated below.

xingkong星空中国官网 the area of cross-layer optimization, my current focus has been put on delay aware control for distributive wireless systems. This topic refers to a joint consideration of PHY layer parameters (e.g., average transmission power) and MAC layer parameters (e.g., average delay) xingkong星空中国官网 optimization objective. For instance, to capture the PHY dynamics, one has to rely on information theory and communication theory. On the other hand, to capture the delay dynamics, one has to rely on queuing theory. Integration of the two theories xingkong星空中国官网 distributive systems is a great challenge. How to decouple the global system control and how to design the low-complexity and distributive algorithms are the key considerations xingkong星空中国官网 this topic.

xingkong星空中国官网 the area of signal processing, my focus has been put on two areas of interests. The first one is the interference mitigation techniques for various interference channels. Novel signal processing methods are studied for typical interfering scenarios xingkong星空中国官网 this area. For example, algorithms have been proposed to align the quadrature-amplitude-modulated interferes with typical channel coding schemes. The second area of interests is large-scale MIMO. Large-scale multiple antennas may have a significant potential to improve the system throughput or reduce the system power consumption; however, it may also suffer from the huge overhead xingkong星空中国官网 channel estimation. Therefore xingkong星空中国官网 this area, novel schemes alleviating the pilot contamination problem and the energy-efficient transmission technologies are studied.

xingkong星空中国官网 the aspect of applied research, my current focus has been put on two areas. The first one is heterogeneous networks (Het-Net). xingkong星空中国官网 3GPP, Het-Net refers to a novel topology where picocells or femtocells are deployed xingkong星空中国官网 the macrocell networks. The issues of inter-cell interference, capacity-limited inter-BS backhaul, high density femtocell/picocell deployment and etc. are investigated xingkong星空中国官网 this area. The second research area is the novel architectures for next-generation cellular systems, which include device-to-device communications xingkong星空中国官网 cellular systems, cloud radio access network, air interface mitigation (e.g., 3GPP WLAN interworking) and etc.

Biography

Rui WANG received his Bachelor of Engineer Degree xingkong星空中国官网 Computer Science & Engineering from the University of Science & Technology of China (USTC) xingkong星空中国官网 2004. xingkong星空中国官网 2008, he obtained the Ph.D. degree xingkong星空中国官网 wireless communications at the Hong Kong University of Science & Technology (HKUST). xingkong星空中国官网 2009, he worked as a post-doctoral research associate xingkong星空中国官网 HKUST. During 2009-2012, he worked as a senior research engineer at Huawei-HKUST Innovation Laboratory, Huawei Technology, Co., Ltd. He is currently an associate professor xingkong星空中国官网 the South University of Science & Technology of China (SUSTC).

Rui Wang has published over 20 papers xingkong星空中国官网 top-level IEEE journals and flagship international conferences, including IEEE Transactions on Information Theoy, IEEE JSTSP, IEEE Transactions on Signal Processing, IEEE Transactions on Wireless Communications and etc, and contributed more than 20 patents on wireless systems. xingkong星空中国官网 addition, Rui Wang is also the key contributor of 1 IEEE standard contribution which is accepted into the IEEE 802.22 specification.

Honors & awards

Selected Publications

◆ R. Wang and V. K. N. Lau, “Delay-Optimal Two-Hop Cooperative Relay Communications via Approximate MDP and Distributive Stochastic Learning”, to appear xingkong星空中国官网 IEEE Transactions on Information Theory.

◆ Y. Cui, V. K. N. Lau, R. xingkong星空中国官网, H. Huang and S. Q. Zhang, “A Survey on Delay-Optimal Resource Control for Wireless Systems — Large derivation Theory, Stochastic Lyapunov Drift and Approximate MDP using Distributive Stochastic Learning”, IEEE Transactions on Information Theory, vol. 58, pp. 1677 – 1701, March 2012.

◆ R. xingkong星空中国官网, V. K. N. Lau, and Y. Cui, “Queue-Aware Distributive Resource Control for Delay-Sensitive Two-Hop MIMO Cooperative Systems”, IEEE Transactions on Signal Processing, vol. 59, pp. 341-350, Jan. 2011.

◆ R. Wang, V. K. N. Lau, and Y. Cui, “Decentralized Fair Scheduling xingkong星空中国官网 Two-Hop Relay-Assisted Cognitive OFDMA Systems”, IEEE Journal of Selected Topics xingkong星空中国官网 Signal Processing, vol. 5, pp. 171-181, Feb. 2011.

◆ R. xingkong星空中国官网, V. K. N. Lau, and H. Huang, “Opportunistic Buffered Decode-Wait-and-Forward (OBDWF) Protocol for Mobile Wireless Relay Networks”, IEEE Transactions on Wireless Communication, vol. 10, pp. 1224-1231, April 2011.

◆ R. xingkong星空中国官网, V. K. N. Lau, L. J. Lv and B. Chen, “Joint Cross-Layer Scheduling and Spectrum Sensing for OFDMA Cognitive Radio Systems”, IEEE Transactions on Wireless Communications, vol. 8, pp. 2410-2416, May 2009.

◆ R. xingkong星空中国官网 and V. K. N. Lau, “Closed-loop Cross-layer SDMA Designs with Outdated CSIT”, IEEE Transactions on Wireless Communications, vol. 8, pp. 1322-1328, March 2009.

◆ R. Wang and V. K. N. Lau, “Combined Cross-Layer Design and HARQ for Multiuser Systems with Outdated CSIT xingkong星空中国官网 Slow Fading Channels”, IEEE Transactions on Wireless Communications, vol. 7, pp. 2771-2777, July 2008.

◆ R. xingkong星空中国官网 and V. K. N. Lau, “Robust Optimal Cross-Layer Designs for TDD-OFDMA Systems with Imperfect CSIT and Unknown Interference: State-Space Approach Based on 1-bit ACK/NAK Feedbacks”, IEEE Transactions on Communications, vol. 56, pp. 754-761, May 2008.

◆ P. W. C. Chan, E. S. Lo, R. xingkong星空中国官网, E. K. S. Au, V. K. N. Lau, R. S. Cheng, W. H. Mow, R. D. Murch, and K. B. Letaief, “The evolution path of 4G networks: FDD or TDD?,” IEEE Communications Magazine, vol. 44, no. 12, pp. 42-50, December 2006.