Aiming at improving the convergence speed of irregular LDPC codes,this paper proposed a construction algorithm of LDPC codes with fast convergence.By reordering the column of parity check matrix of the original irregular LDPC codes,it could enhance the reliability of the information bits and reduce the average iteration times,and thus obtained an improvement of the convergence speed.Simulation results show that,LDPC codes which was designed using the proposed algorithm have faster convergence speed for variable-node-based layered belief-propagation(VL-BP) decoding algorithm.In addition,for both belief-propagation(BP) decoding algorithm and VL-BP decoding algorithm,the designed LDPC codes possess a better error performance.
