Mobility

Minimum Bit Error Rate Beamforming Receiver for Space-Division Multiple-Access Based Quadrature Amplitude Modulation Systems

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Executive Summary

The authors considers the beam-forming assisted multiple-antenna receiver for space-division multiple-access based multiuser systems that employ high-throughput Quadrature Amplitude Modulation (QAM) signaling. The Bit Error Ratio (BER) expression as the function of the beam-former's weight vector is derived, and the Minimum BER (MBER) beam-forming receiver is then obtained as the solution of the resulting optimisation problem that minimises the MBER criterion. A simplified conjugate gradient algorithm, which has previously demonstrated its effectiveness in solving the Minimum Symbol Error Ratio (MSER) optimisation problem, is employed to solve this MBER optimisation.

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