Raptor codes for higher-order modulation using a multi-edge framework

Title: Raptor codes for higher-order modulation using a multi-edge framework
Creator: Jayasooriya, Sachini; Shirvanimoghaddam, Mahyar; Ong, Lawrence; Johnson, Sarah J.
Relation: IEEE Wireless Communications Letters Vol. 7, Issue 1, p. 110-113
Publisher Link: http://dx.doi.org/10.1109/LWC.2017.2757482
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Resource Type: journal article
Date: 2018
Description: In this letter, we represent Raptor codes using a multi-edge framework, which gives a general framework to design them for higher-order modulation using multi-edge type density evolution. We then propose an efficient Raptor code design method for higher-order modulation, where we design distinct degree distributions for distinct bit levels. We consider a joint decoding scheme based on belief propagation for Raptor codes and also derive an exact expression for the stability condition. In several examples, we demonstrate that the higher-order modulated Raptor codes designed using the multi-edge framework outperform previously reported higher-order modulation codes in literature.
Subject: density evolution; multi-edge type LDPC codes; modulation; Raptor codes
Identifier: http://hdl.handle.net/1959.13/1390425
Identifier: uon:33049
Identifier: ISSN:2162-2337
Language: eng
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