Joint power control and blind beamforming in wireless networks

Abstract

Traditional power control with beamforming achieves a targeted signal-to-inference-noise-ratio (SINR) in wireless networks assuming measurement of SINR and direction of arrival (DOA) at the receivers. Blind beamforming is an emerging technique for DOA measurement without consuming extra bandwidth. Here we propose a joint power control and blind beamforming algorithm that reformulates the power control problem and, importantly, does not need additional measurements or sending training sequences. In contrast to traditional power control that achieves a targeted SINR threshold, the scheme achieves a threshold on a quantity available from blind beamforming, which is directly related to bit error rate. We have shown in both analysis and simulation results that the algorithm converges to the desired solution.