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Effects of Spatial Correlation on MIMO Adaptive Antenna System With Optimum Combining

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4 Author(s)
Jin Sam Kwak ; Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX ; Heewon Kang ; Ye Li ; Gordon L. Stuber

In this paper, we investigate the effects of the spatial fading correlation on the performance of a multiple-input multiple-output (MIMO) adaptive antenna system with optimum combining (OC) in the presence of multiple cochannel interferers over a correlated Rayleigh fading channel. Based on the Khatri's distribution functions of quadratic forms in complex Gaussian random matrices, we develop a unified determinant representation of those joint eigenvalue distributions. Taking into account the spatial correlation among the antenna elements at the transmitter or receiver, we derive the closed-form formulas for the probability density function and outage probability of the maximum output signal-to-interference ratio (SIR) in an interference-limited MIMO-OC system. Furthermore, the average output SIR and error probability are also investigated. From numerical examples, we show that a new theoretical approach gives a simple and accurate way to assess the performance of the MIMO-OC system over arbitrarily correlated fading channels

Published in:

IEEE Transactions on Wireless Communications  (Volume:6 ,  Issue: 5 )