Comparative analysis of MU detector in LDPC coded LS MIMO OFDM

Large Scale Multiple Input Multiple Output (LS MIMO) combined with Orthogonal Frequency Division Multiplexing (OFDM) is a key technique by prevaling the fading effects of wireless channel. The application of Low Density Parity Check codes (LDPC) to LS MIMO OFDM systems with hundreds of antennas at the receiver has been proposed in this paper. MIMO technology with channel coding like Low Density Parity Check codes (LDPC) is a promising solution in achieving data rate transmission with low probability of error. The multiuser signals transmitted to the Base Station (BS) are detected by low complexity linear MMSE detector. LDPC coded LS MIMO OFDM system is designed so as to decode the symbols at low complexity with linear minimum distance which thus enables to attain low bit error rate. In this paper a comparative analysis of the performance of multiuser detector in LS MIMO OFDM is presented. Characteristics of multiuser detection in LDPC coded LS MIMO OFDM is analysed by Bit Error Rate (BER), outage probability and radiation pattern of the detected signal. Simulation outcomes indicates the detector performance of LDPC coded system outperform that of an uncoded system.