An Improved Decoding Method for LDPC Codes in SC-FDE System

Single carrier transmission with cyclic prefix (SC-CP or SC-FDE), has been adopted in wireless applications as an alternative technique to orthogonal frequency division multiplexing (OFDM). In this paper, an improved decoding method for regular low density parity check (LDPC) codes is proposed to compensate for the loss in signal-to-noise (SNR) due to the CP insertion. According to our research, the algorithm to select suitable CP plays an important role in decoding. The performance of the uncoded case is well analyzed. Simulation results show that the proposed scheme is effective under both AWGN and Rayleigh fading channels.