Low-Density Parity-Check Codes and Their Application in Image Transmission
低密度校验码及其在图像传输中的应用

Low-Density Parity-Check (LDPC) codes axe a class of channel codes based on graphs and iterative decoding whose performance is very close to the Shannon limit with low complexity and have strong error control strength. In this paper, encoding and decoding principles of LDPC codes are deeply studied. At the same time, this coding scheme is applied in image transmission system over Rayleigh fading channel. The simulation results indicate that LDPC codes can make the quality of the image highly improved with rather low system complexity and short decoding time delay.