Title :
LT codes with loss rate and decreasing ripple size for wireless relay communications
Author :
Lei Zhang ; Jianxin Liao ; Jingyu Wang ; Qi Qi
Author_Institution :
State Key Lab. of Network & Switching Technol., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In this paper, new fountain codes named LT-LR-DRS (Luby Transfer with Loss Rate and Decreasing Ripple Size) codes are proposed for wireless relay communications. The transmission is divided into two phases: at first phase, all original symbols are transmitted and some original symbols are lost during transmission; encoded symbols generated by LT-LR-DRS codes are transmitted at second phase to recover the lost symbols. In LT-LR-DRS, an innovative degree distribution instead of RSD (Robust Soliton degree Distribution) is proposed. The minimum degree of encoded symbols is decided by loss rate and the ripple size is decreased during decoding process. We show both analytically and through real experiments, that LT-LR-DRS codes have better performance in term of average overhead, complexity and memory usage compared to LT, SLT-LR (Shifted LT with Loss Rate), LT-DRS (LT with Decreasing Ripple Size) codes.
Keywords :
decoding; encoding; relay networks (telecommunication); LT-LR-DRS codes; Luby transfer with loss rate and decreasing ripple size codes; SLT-LR; decoding process; shifted LT with loss rate; symbol encoding; wireless relay communications; Decoding; Encoding; Propagation losses; Receivers; Relay networks (telecommunications); Wireless communication; Decreasing ripple size; LT codes; LT-LR-DRS codes; Loss rate; Wireless relay communications;
Conference_Titel :
Ubiquitous and Future Networks (ICUFN), 2014 Sixth International Conf on
Conference_Location :
Shanghai
DOI :
10.1109/ICUFN.2014.6876783
