“清华信息大讲堂”第九讲

慢衰落信道中具有不完善信道状态信息的无线通信

报告题目： Wireless Communications with Imperfect Channel State Information (CSIT) in Slow Fading Channels

报 告 人：    Dr. Vince K N Lau，Associate Professor

报告时间：    2006年6月13日（星期二）上午10:00

报告地点：    信息大楼（FIT）1区315

主办单位：    信息学院电子工程系

联 系 人:     曹志刚62771026

报告摘要:  Channel state information has been very important for wireless communications for adaptation. Adaptation at the transmitter is very critical to exploit the time-varying nature of the fading channels. For example, under

perfect channel state knowledge, the wireless system can achieve ergodic capacity in slow fading channels through rate and power adaptation. In practice, the CSI knowledge at the transmitter (CSIT) is achieved either through explicit feedback (FDD systems) or through implicit feedback (TDD systems). In both cases,  the knowledge of CSI at the transmitter can never be perfect, especially when the number of antennas, number of subcarriers as well as number of users are large. In this talk, we shall investigate how we can exploit imperfect knowledge of CSIT in wireless communications. We shall first talk about the diversity - multiplexing tradeoff in point to point MIMO link with imperfect CSIT. Afterwards, we shall discuss how the cross layer can exploit the imperfect CSIT knowledge as well in slow fading channels with heterogeneous delay constraints.

报告人简介:

Vincent obtained his B.Eng (1st Hons) from the University of Hong Kong in 1992 and Ph.D. from Cambridge University from  1995-1997. He joined the Bell Labs - Lucent Technologies, New Jersey as member of technical staff in 1997-2003. He joined the department of EEE, HKUST as Associate Professor in August 2004. He has a total of 7 years industrial experience and 6 years of academic experience. Vincent has published around 40 papers in IEEE Transactions, 60 papers in IEEE conferences, 15 Bell Labs Technical Memorandum and contributed to 12 US patents on wideband CDMA and wireless LAN systems. He is the principal author of a book “Channel Adaptation Technologies and Cross Layer Designs for Multi-antenna Wireless Systems [by John Wiley and Sons - John Proakis Telecom Series in 2006] and a book on wireless baseband System-on-Chip (SoC) ASIC design [by Cambridge University Press in 2007] as well as invited author of two book chapters on wideband CDMA technologies. His research interests include communication theory with limited feedback, cross layer design with imperfect CSIT for MIMO/OFDM wireless systems as well as baseband ASIC design.