Đang chuẩn bị liên kết để tải về tài liệu:
Báo cáo hóa học: " Research Article Diversity Analysis of Distributed Space-Time Codes in Relay Networks with Multiple Transmit/Receive Antennas"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Diversity Analysis of Distributed Space-Time Codes in Relay Networks with Multiple Transmit/Receive Antennas | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 254573 17 pages doi 10.1155 2008 254573 Research Article Diversity Analysis of Distributed Space-Time Codes in Relay Networks with Multiple Transmit Receive Antennas Yindi Jing1 and Babak Hassibi2 1 Department of Electrical Engineering and Computer Science University of California Irvine CA 92697 USA 2 Department of Electrical Engineering California Institute of Technology Pasadena CA 91125 USA Correspondence should be addressed to Yindi Jing yjing@uci.edu Received 1 May 2007 Revised 13 September 2007 Accepted 28 November 2007 Recommended by M. Chakraborty The idea of space-time coding devised for multiple-antenna systems is applied to the problem of communication over a wireless relay network a strategy called distributed space-time coding to achieve the cooperative diversity provided by antennas of the relay nodes. In this paper we extend the idea of distributed space-time coding to wireless relay networks with multiple-antenna nodes and fading channels. We show that for a wireless relay network with M antennas at the transmit node N antennas at the receive node and a total of R antennas at all the relay nodes provided that the coherence interval is long enough the high SNR pairwise error probability PEP behaves as 1 P min M NiR if M N and log 1 MP P MR if M N where P is the total power consumed by the network. Therefore for the case of M N distributed space-time coding achieves the maximal diversity. For the case of M N the penalty is a factor of log 1 MP which compared to P becomes negligible when P is very high. Copyright 2008 Y. Jing and B. Hassibi. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION It is known that multiple antennas can greatly increase the capacity and reliability of