Bit Error Rate Analysis of Time Domain Low Rank Channel Precoder in M-MIMO Systems

In this paper we proposed the evaluated bit error rate (BER) performance of wireless channel beam-forming technology in wideband precoder manner. We focused on massive multiple-input multiple-output (M-MIMO) mobile system with extended antenna number on transmission side and receiver user equipment (UE) side. Basically, the channel precoding processing provide in frequency domain, in OFDM- MIMO system jointly. For computational complexity reduction of beam-forming processing for each sub-band we calculate the precoder in time-domain by 1D-DFT approximation in frequency domain for 1st layer transmission. For reliability estimation of received data on UE we analysis the performance of BER vs SNR through frequency-selective MIMO channel under A WNG condition. In the end of paper, we make sure that the processing in the OFDM system of precoder recalculation in time-domain achieve a gain in energy efficiency term, approximately 1–2 dB, compared with PSK modulation scheme, and losses less than 10% compared with baseline beam-forming algorithm in frequency-domain.