Performance of Irregular LDPC Codes on Rician-Fading Channels
Weiling Wu · Dianzi xuebao · 2005
This paper analyzes and simulates the performance of irregular low density parity check (LDPC) codes on Rician fading channels and the others,and modifies BP decoding algorithm,proves the symmetry and shows the stability conditions on Rician channels,calculates the Shannon limit of Rician channels.Using Visual C++ we simulate the performance with code word length N=3072 and 49152.The simulation results indicate that when N=49152,code rate R=1/3,the distance from Shannon's limit are 0.67dB,0.72dB and 0.91dB for AWGN,Rician and Raylrigh channels,respectively,LDPC codes having nice interleaving performance and anti-fading capability,and better performance of LDPC than Turbo codes in some area of SNR.Therefore the performance of LDPC codes is also very effective on all kind of channels,including Rician channels.