A Lower Bound on Outage Probability of Limited Feedback MIMO Beamforming Systems


B. Mondal and Robert W. Heath Jr


In Proc. of IEEE Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, USA, Nov. 7-10, 2004.


In this paper, the performance of multiple-input multiple-output (MIMO) beamforming-combining wireless systems employing limited feedback is studied from the point-of-view of outage probability. Assuming that the transmitter uses a quantized beamforming vector, a lower bound on the outage probability is derived. The bound holds for arbitrary transmit and receive antennas. This analysis quantifies the impact of feedback rate and antenna configuration on the performance of the system. Simulations have shown that vector quantization based codebook design can closely achieve the lower bound implying the bound is tight and provides a relevant measure of performance.

Preprint is available here.