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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/14265

Title: Performance Improvement of Joint Source-Channel Coding with Unequal Power Allocation
Authors: He, Jiguang
Li, Yong
Wu, Guangfu
Qian, Shen
Xue, Qiang
Matsumoto, Tad
Keywords: Joint protograph extrinsic information transfer (JPEXIT)
joint source-channel coding (JSCC)
protograph low-density parity-check (LDPC) codes
unequal power allocation (UPA)
Issue Date: 2017-06-22
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Magazine name: IEEE Wireless Communications Letters
Start page: 1
End page: 4
DOI: 10.1109/LWC.2017.2718542
Abstract: We develop a joint source-channel coding (JSCC) scheme based on an unequal power allocation strategy, in which different levels of power are allocated according to a priori probability distribution of the information bits. Two protograph low-density parity-check codes are used as the source code and the channel code, respectively, in the proposed JSCC scheme. With fixed row weight and row element alphabet, optimization on the source code is conducted via random search to obtain a best-found base matrix with the lowest decoding threshold among all the searched base matrices. Simulation results show that the new JSCC scheme outperforms the traditional equal power allocation based JSCC by exploiting the source statistics at the decoder. Moreover, theoretical threshold analysis is in agreement with the practical simulation results.
Rights: This is the author's version of the work. Copyright (C) 2017 IEEE. IEEE Wireless Communications Letters, 2017, DOI:10.1109/LWC.2017.2718542. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
URI: http://hdl.handle.net/10119/14265
Material Type: author
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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