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: Asymptotic Analysis in MIMO MRT/MRC Systems Quan Zhou and Huaiyu Dai | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006 Article ID 45831 Pages 1-8 DOI WCN 2006 45831 Asymptotic Analysis in MIMO MRT MRC Systems Quan Zhou and Huaiyu Dai Department of Electrical and Computer Engineering NC State University Raleigh NC 27695-7511 USA Received 11 January 2006 Revised 20 July 2006 Accepted 16 August 2006 Recommended for Publication by Zhiqiang Liu Through the analysis of the probability density function of the largest squared singular value of a complex Gaussian matrix at the origin and tail we obtain two asymptotic results related to the multi-input multi-output MIMO maximum-ratio-transmission maximum-ratio-combining MRT MRC systems. One is the asymptotic error performance in terms of SNR in a single-user system and the other is the asymptotic system capacity in terms of the number of users in the multiuser scenario when multiuser diversity is exploited. Similar results are also obtained for two other MIMO diversity schemes space-time block coding and selection combining. Our results reveal a simple connection with system parameters providing good insights for the design ofMIMO diversity systems. Copyright 2006 Q. Zhou and H. Dai. 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 Multi-input multi-output MIMO systems can be exploited for spatial multiplexing or diversity gains. For a MIMO diversity system appropriate diversity combining techniques are employed at the transmit and receive end to effectively transform the MIMO channel into an equivalent singleinput single-output SISO one with increased robustness. Depending on whether the channel state information CSI is required at the transmitter MIMO diversity schemes can be divided into two categories open-loop and closed-loop. Among the former is the .
