Performance of adaptive MIMO system based on beam-nulling

Authors:
Mabruk Gheryani;Zhiyuan Wu;Yousef R. Shayan
Affiliations:
Concordia University, Department of Electrical Engineering, Montreal, Quebec, Canada;Concordia University, Department of Electrical Engineering, Montreal, Quebec, Canada;Concordia University, Department of Electrical Engineering, Montreal, Quebec, Canada
Venue:
ISWPC'09 Proceedings of the 4th international conference on Wireless pervasive computing
Year:
2009

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Abstract

In this paper, "beam-nulling" is proposed to send signals over a generated subspace orthogonal to the weakest spatial subchannel fed back from the receiver. Signal-to-interference-plus-noise ratio (SINR) of MMSE receiver is derived for beam-nulling. Then the associated average bit-error rate (BER) of beam-nulling is given numerically and verified by simulation results. Simulation results are provided to compare beam-nulling with beamforming at the same data rate. To improve performance further, beam-nulling is concatenated with linear dispersion code. Simulation results are also provided to compare the concatenated scheme with beamforming.