Title: Analysis of the degree distribution for LT codes

Authors: Guo Tai Chen; Lei Cao; Haifeng Zheng

Addresses: The Department of Electronic and Information Engineering, Fuqing Branch, Fujian Normal University, Fujian, China ' Department of Electrical Engineering, The University of Mississippi, Oxford, MS, USA ' College of Physics and Information Engineering, Fuzhou University, Fujian, China

Abstract: As the first type of practical fountain codes, LT codes are used in various applications. Although the performance of an LT code is determined by the parameters of the Robust Soliton Distribution (RSD), this relationship remains largely unclear. In this paper, we analytically study the relationship between the mean degree value of the RSD and the parameters including the spike position and δ in RSD. Then, with obtained properties and simulation results, we further investigate the impact of these parameters on the performance of LT codes.

Keywords: LT codes; Luby Transform codes; fountain codes; robust soliton distribution; degree distribution; wireless computing.

DOI: 10.1504/IJWMC.2014.062007

International Journal of Wireless and Mobile Computing, 2014 Vol.7 No.3, pp.224 - 230

Available online: 29 May 2014 *

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