Doped LT Decoding with Application to Wireless Broadcast Service

Abstract

In this paper, we consider the doped decoder for Luby-Transform (LT) codes, where based on the decoder feedback, the decoding process is revived by retransmission of the information packet. We propose several improved doping methods to reduce the average doping rate. We then provide an analysis of the proposed doping methods based on the study of the decoding ripple evolution. Both analytical and simulation results show that the proposed doping approaches provide significant performance gain over the existing random doping strategy. We then apply the doped LT decoding to the wireless broadcast system in which limited feedback is allowed. We propose a majority vote based doping selection and demonstrate the efficiency of the proposed doping selection through simulations.

Low Complexity Differentiating Adaptive Erasure Codes for Multimedia Wireless Broadcast

“…6). A recent contribution, based on our model of the ripple process, analyzes several other doping mechanisms, and their usage for wireless broadcast [16].…”