Title :
A Low Complexity Sequential Decoding Algorithm for Rateless Spinal Codes
Author :
Weiqiang Yang ; Ying Li ; Xiaopu Yu ; Juan Li
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´an, China
fDate :
7/1/2015 12:00:00 AM
Abstract :
A forward stack decoding (FSD) algorithm for rateless spinal codes is proposed in this letter. This decoding algorithm divides the decoding tree of the spinal code into several layers, and then searches the decoding paths in each single layer. Compared with the bubble decoder, which was initially designed for spinal codes, the proposed FSD algorithm can decrease the complexity significantly without sacrificing the rate performance. We also illustrate that the complexity of the FSD algorithm decreases with the increase of the signal-to-noise ratio (SNR). Simulation shows that the complexity of the FSD algorithm is only 15.37% of that of the bubble decoder when SNR is 20 dB.
Keywords :
sequential decoding; trees (mathematics); FSD algorithm; bubble decoder; decoding tree; forward stack decoding algorithm; low complexity sequential decoding algorithm; rateless spinal codes; Algorithm design and analysis; Complexity theory; Encoding; Maximum likelihood decoding; Measurement; Signal to noise ratio; Rateless spinal codes; forward stack decoding algorithm; sequential decoding;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2015.2438062
