Average Magnitude Based Weighted Bit-flippingDecoding Algorithm for LDPC Codes

Considering the Weighted Bit Flipping (WBF) and Modified Weighted Bit Flipping (MWBF) decoding algorithms for Low Density Parity-Check (LDPC) codes, a modified algorithm is proposed in this paper. Based on Average Magnitude (AM), a more simple and efficient method for computing the reliability of the parity checks is introduced to improve the flipping criterion. Simulation results show that the performance of the improved scheme is better than that of WBF and MWBF algorithms about 1.65 dB and 1.36 dB at BER of10-5in the presence of AWGN, while the average number of decoding iterations is reduced by 18.2%~39.91% and 17.54%~34.78%, respectively.