MRC Detection over SIMO OFDM Systems in the Presence of Phase Noise

In this paper, we extend the phase noise suppression problem to single input multi output (SIMO) assisted orthogonal frequency division multiplexing (OFDM) systems, using the concept of Kullback-Leibler divergence (KL divergence) and under the context of variational inference approach. Using maximum ratio combining (MRC) receiver for SIMO system, we perform initial point detection improvement on joint estimation of common phase noise and random phase noise by minimizing the KL divergence, over desired unknown parameters. Moreover data detection stage is obtained in parallel, using this structure. MRC is applied for SIMO detection which leads to Signal to Noise Ratio (SNR) enhancement and significant bit error rate (BER) reduction. The comparison which is performed for single input single output (SISO) and SIMO system, demonstrates the BER improvement.