Research on Performance of Regular LDPC Codes better than Turbo Codes
HE He-yun · Radio Engineering of China · 2008
A kind of regular LDPC codes is introduced.Its error correcting capability is better than Turbo codes' and approaches to Shannon limit(1.2 dB).The construction of the sparse parity matrix is important,which affects the LDPC codes' error correcting capability.In this paper,the diagonal method is adopted to construct sparse check matrix of(n,3,6) in approximate lower triangle,which meets the numbers of and distribution randomicity of nonzero elements.The belief propagation algorithm is used in decoding simulation,and the vectorization method is proposed to reduce the iteration decoding time.