Performance study of the optimal beamformer in the M-sequence receiving system

A comprehensive study of the performance of the optimal adaptive beamformer in the M-sequence receiving system is presented. Two receiving system arrangements were considered: (1) adaptive beamformer precedes the matched filtering (APM), and (2) matched filtering precedes the adaptive beamformer (MPA). The optimal adaptive beamformer was constructed through the Bayesian approach. Theoretical and Monte Carlo simulation analysis showed that at high array signal-to-noise ratios, since the adaptive beamformer could converge to the steady state, the order of processing did not make a difference in the overall system performance. However, the convergence of the adaptive beamformer at low array signal-to-noise ratios was affected by the change in signal environment due to the change of the order of processing. Simulation showed that the performance of the MPA system had a lower threshold in the array signal-to-noise ratio