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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: Maximum MIMO System Mutual Information with Antenna Selection and Interference | EURASIP Journal on Applied Signal Processing 2004 5 676-684 2004 Hindawi Publishing Corporation Maximum MIMO System Mutual Information with Antenna Selection and Interference RickS. Blum Department of Electrical and Computer Engineering Lehigh University Bethlehem PA 18015-3084 USA Email rblum@eecs.lehigh.edu Received 31 December 2002 Revised 13 August 2003 Maximum system mutual information is considered for a group of interfering users employing single user detection and antenna selection of multiple transmit and receive antennas for flat Rayleigh fading channels with independent fading coefficients for each path. In the case considered the only feedback of channel state information to the transmitter is that required for antenna selection but channel state information is assumed at the receiver. The focus is on extreme cases with very weak interference or very strong interference. It is shown that the optimum signaling covariance matrix is sometimes different from the standard scaled identity matrix. In fact this is true even for cases without interference if SNR is sufficiently weak. Further the scaled identity matrix is actually that covariance matrix that yields worst performance if the interference is sufficiently strong. Keywords and phrases MIMO antenna selection interference capacity. 1. INTRODUCTION Multiple-input multiple-output MIMO channels formed using transmit and receive antenna arrays are capable of providing very high data rates 1 2 . Implementation of such systems can require additional hardware to implement the multiple RF chains used in a standard multiple transmit and receive antenna array MIMO system. Employing antenna selection 3 4 is one promising approach for reducing complexitywhile retaining a reasonably large fraction of the high potential data rate of a MIMO approach. One antenna is selected for each available RF chain. In this case only the best set of antennas is used while the remaining antennas are not employed thus reducing the .
