Application of LLR-BP optimization algorithm in MIMO-OFDM

摘要

This paper introduces the Multiple Input Multiple Output (MIMO), Orthogonal FrequencyrnDivision Multiplexing (OFDM) and Low Density Parity Check Code (LDPC). Then, this paper givesrnthe improved log domain Back Propagation (BP) decoding algorithm optimizing the variable nodesrnand simplifying the check nodes. The ameliorate approach can reduce the decoding complexity, at thernsame time improving the decoding performance. Finally, builds a MIMO-OFDM communicationrnsystem. Then it studies the application of LDPC on the MIMO-OFDM systems. Taking use thernsoftware simulation, this paper compares the influence of Bit Error Rate (BER) performance ofrndifferent parameters on the system.