Performance of Multiple Antenna Beamforming in Higher Constellation PSK Signaling Schemes

Abstract

The quality of reception of radio signals at the destination is greatly influenced by the type of signaling schemes used and the use of multiple antennas at the output of transmitter and the input of receiver. However, this configuration usually causes InterCarrier Interference (ICI), which leads to distortions. In this paper, the performance of 6×6 multiple antenna beamforming in offset 16, 32 and 64-Phase Shift Keying (PSK) schemes is evaluated using the system model for the received signal developed to reduce distortions. The beamforming is performed on the offset signaling schemes by weighing the transmitted streams with the eigenvalues of the 6×6 antenna channel before the transmission through the 6 multiple antennas over the Rayleigh channel. The distorted signals received are demodulated and filtered by using the square root raised cosine receive filter. These signals are detected and compared with the transmitted bits to evaluate the performance using Bit Error Rate (BER). The results obtained show that as the constellation size of offset PSK schemes increases, the BER values increase and provide better performance than the corresponding conventional schemes.