Iterative Decoder Design for Joint Source-Channel LDPC Coding

Author

Lakovic, Ksenija ; Tian, Tao ; Villasenor, John

Author_Institution

Hitachi Global Storage Technol., San Jose, CA

Volume

1

fYear

2005

fDate

21-24 Nov. 2005

Firstpage

486

Lastpage

489

Abstract

We consider joint source-channel coding with variable length codes (VLCs) and LDPC codes. We propose an iterative source-channel decoding system, which involves message passing between a soft-input-soft-output VLC decoder and an LDPC decoder. The proposed system utilizes the residual redundancy of the variable length code during the iterative decoding process, and is expected to exhibit decoding convergence at a lower SNR relative to the system in which source and channel decoding are performed separately. We present computer simulation results that confirm the expected gain of the proposed system

Keywords

combined source-channel coding; iterative decoding; message passing; parity check codes; variable length codes; LDPC codes; computer simulation; iterative decoder design; joint source-channel LDPC coding; message passing; variable length codes; Channel coding; Communication systems; Computer simulation; Convergence; Convolutional codes; Delay; Iterative decoding; Message passing; Parity check codes; Turbo codes; LDPC codes; joint source-channel coding; variable length codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer as a Tool, 2005. EUROCON 2005.The International Conference on

Conference_Location

Belgrade

Print_ISBN

1-4244-0049-X

Type

conf

DOI

10.1109/EURCON.2005.1629970

Filename

1629970