On improving the successful decoding performance of MDD based LT codes for erasure channels

Abstract

In this paper, the performance of Luby Transform (LT) codes with modified degree distribution (MDD) is investigated for packet erasure channels (PEC). In LT codes, the number of degree-1 encoded symbols at the receiver plays a vital role in the successful recovery of all information symbols. Hence, this work aims to determine the optimal number of received encoded symbols needed to be degree-1 at the decoder for maximizing the decoding performance of LT codes. S imulation results demonstrate that significant improvements in successful decoding probability could be achieved by varying the proportion of degree-1 encoded symbols using MDD.