LDPC codes are good codes which had been invented by Gallager.

LDPC codes and turbo codes are similar in many aspects, both can extremely approach to the Shannon limits by their unique ways.

Performance Analysis of LDPC Decoding Algorithm;

Study and Development of LDPC Coding;

Analysis of LDPC Decoding Algorithm Based on Serial Schedule;

Iterative phase synchronization algorithm based on modified Costas loop for LDPC coded systems;

Algorithm of flipping-bit decoding for LDPC code;

Applied quasi-cyclic LDPC codes from doubly-extended RS code and cyclic MDS code;

Improved decoding algorithm for irregular low-density parity-check codes and its implementation with DSP;

Study on Some Key Problems of Low-Density Parity-Check Codes;

The invention and development of low-density parity-check codes (LDPC) narrow the gap between real system performance and channel capacity.

Study on LDPC codes based on cyclic-shift identity matrix;

Extended LDPC codes based on linear row decomposition;

Configurable min-sum decoding algorithm for LDPC codes;

The simulation results and analysis indicate that such construction algorithm is of the advantages as follows: The performance of irregular QC-LDPC codes constructed by the proposed methods in the paper not only be better than the regular QC-LDPC codes by the direct construction algorithm,but also be closed to the random-like LDPC codes;They have lower error floors compare with the random-lik.

This paper presents a decoding method for regular QC-LDPC codes.

This paper designs a kind of circulant-shift permutation matrix called Q matrix,replacing identity matrix I as partitioned matrix,which fills in parity-check matrix H to form irregular QC-LDPC codes,based on the integration of 4G and WiMAX in technology.