A New Joint Source-Channel Coding Scheme Based on Nested Lattice Codes

Author

Yang, Zheng ; Zhao, Shancheng ; Ma, Xiao ; Bai, Baoming

Author_Institution

Dept. of Electron. & Commun. Eng., Sun Yat-sen Univ., Guangzhou, China

Volume

16

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

730

Lastpage

733

Abstract

In this paper, we propose a new joint source-channel coding (JSCC) method for transmission of a Gaussian source through an additive white Gaussian noise (AWGN) channel whose bandwidth is higher than that of the source. Firstly, a sequence of random variables from a Gaussian source is discretized with a lattice-based quantizer, resulting in a sequence of lattice points. Secondly, by driving an encoder of a systematic group code, these lattice points are utilized to compute a sequence of parity lattice points. Thirdly, both the systematic and the parity lattice points are scaled and transmitted over an AWGN channel. Simulation results show that, with moderate code length, our scheme performs well when compared with the Shannon limits.

Keywords

AWGN channels; combined source-channel coding; AWGN channel; Gaussian source transmission; additive white Gaussian noise channel; encoder; joint source-channel coding scheme; lattice-based quantizer; nested lattice code; parity lattice point; systematic group code; Channel coding; Decoding; Joints; Lattices; Systematics; Vectors; Group codes; Kite codes; joint source-channel coding; nested lattice codes;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.031912.120151

Filename

6174415