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ThinkMind // SPACOMM 2012, The Fourth International Conference on Advances in Satellite and Space Communications // View article spacomm_2012_3_30_30080


A LT-Based Distributed Codes Over Erasure Channel

Authors:
Liting Wei
Jian Jiao
Zhihua Yang
Shushi Gu
Qinyu Zhang
Youhua Fan

Keywords: Distributed coding; Relay; LT code; WRSD

Abstract:
For the future space network scenarios, where multi-rovers can return science data through one obiter simultaneously, we design a new distributed LT (NDLT) code between two sources, one relay and a single sink, which could enhance the efficiency and reliability of packets transferring from source to sink. This paper proposes a method to decompose weaken robust soliton distribution (WRSD) exploited by relay node into two deconvolved weaken robust soliton distributions (DWSDs), which are used in the sources and have lower average degree than traditional RSD-based deconvolved soliton distributions (DSDs). Low operation complexity at sources and only including a simple XOR operation at relay node could be provided by the proposed degree distribution. This paper provides analytical results about the coding complexity of proposed and traditional distributed LT (DLT) code. The simulation results show that the proposed NDLT has a higher decoding probability than that of traditional DLT, under the conditions of recovering a certain proportion of original information, such as some space mission scenarios with specific data completeness requirement.

Pages: 53 to 59

Copyright: Copyright (c) IARIA, 2012

Publication date: April 29, 2012

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-61208-194-6

Location: Chamonix, France

Dates: from April 29, 2012 to May 4, 2012

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