Abstract:
Fountain codes are novel channel coding technologies with very little decoding overhead and a small complexity of encoding and decoding.LT codes have an important research value,considering it is widely used in network and wireless communication as one class of fountain codes.The encoding and decoding algorithms of LT code are introduced in this paper.Two kinds of improved decoding algorithms,which base on Belief Propagation (BP) algorithm and Gaussian Elimination (GE) algorithm,are obtained.The performance of the two kinds of improved decoding algorithms is significant.The reliability of communication system which include LT code only and combine LT code with other different kinds of channel coding,such as LT with CRC,LDPC code,are simulated.The encoding scheme of LT with LDPC,the result of which is obtained from simulation,has a high decoding rate and more lower bit error rate than the one of others,which provides a preferable reference for the practical application in intelligent distribution network.