A simulation study of least-squares received beamforming on HAP frequency-selective channel

This paper explores the impact of slightly frequencyselective Rician fading channel on the performance of leastsquares received beamforming. This channel type is encountered in the communications from high-altitude platform (HAP) to high-speed train (HST) in urban area and at Ka-band operating frequency. The system performance in terms of mean-square error (MSE) and bit error rate (BER) for different scenarios of Direction of Arrival (DOA) are evaluated by Monte Carlo simulation.