Dr. Yindi Jing

Assistant Professor, University of Alberta, Canada

 

时间：2009年11月11日下午2:30

地点：电三楼三层六系第一会议室

主办：电子工程与信息科学系

 

Abstract: With the increasing demands for high capacity, efficiency, and reliability, how to combat the fading effect of wireless channels is one of the most prominent problems in wireless communications. Network cooperative diversity, a recently emerged concept that has drawn considerable attention during the past decade, has been shown to be a promising solution. Its basic idea is to improve network performance by allowing multiple nodes in the network to help each other’s communication task.

　 One crucial question in network cooperation is how to design effective distributive schemes for node cooperation. To tackle this problem, we propose to use the idea of space-time coding, a mature and successful diversity scheme original proposed for multiple-antenna systems. Distributed space-time coding and differential distributed space-time coding are proposed for coherent and non-coherent relay networks of any sizes. The key idea is to use the block-fading model and design the transmit signal at each relay antenna to be a linear function of its received signal. With these strategies, even without information exchange, the relays form a space-time codeword as if their antennas are co-located transmit antennas. The schemes apply naturally for networks as no channel information is required at the transmitter and the relays. Based on the error rate analysis, the schemes are shown to achieve the maximal spatial diversity. Specific differential and coherent codes that have full diversity and high coding gain are also constructed systematically. Finally, cooperative schemes for networks with full or partial channel information at the transmitter and relays are discussed.

 

Dr. Yindi Jing received the B.E. and M.E. degrees in automation from the University of Science and Technology of China, Hefei, China, in 1996 and 1999. She received the M.S. degree and the Ph.D. in electrical engineering from California Institute of Technology, Pasadena, CA, in 2000 and 2004, respectively. From October 2004 to August 2005, she was a postdoctoral scholar at the Department of Electrical Engineering of California Institute of Technology. Since February 2006 to June 2008, she was a postdoctoral scholar at the Department of Electrical Engineering and Computer Science of the University of California at Irvine. She joined the Electrical and Computer Engineering Department of the University of Alberta as an assistant professor in August 2008.

　  Her research interests are in wireless communications, focusing on network cooperative diversity, network cross layer design, MIMO systems, and the analysis on network fundamental limits.

 

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