Improved belief propagation decoding for LT codes
He Xiuhui, Minlan Jiang · Computer Engineering and Applications Journal · 2012
Over the erasure channel,the performance of the belief propagation decoding algorithm of LT codes with small message length is bad.An improved belief propagation decoding algorithm is proposed,which only uses the Gaussian elimination method to confirm a few guessing bits for realizing decoding successfully after belief propagation decoding fails.The simulation results demonstrate that,compared with the belief propagation decoding,the proposed algorithm can significantly improve the decoding performance.The cost is in some added decoding time.