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.