Joint source channel decoding of circular non binary turbo codes

Author

Beeharry, Yogesh ; Fowdur, Tulsi Pawan ; Soyjaudah, K. M. Sunjiv

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Mauritius, Réduit, Mauritius

fYear

2013

fDate

9-12 Sept. 2013

Firstpage

1

Lastpage

5

Abstract

Non binary turbo codes are gaining a lot of attention since the recent adoption of duo binary circular turbo codes by the Digital Video Broadcasting (DVB) community. In this paper, a Joint Source Channel Decoding (JSCD) scheme is proposed for circular non-binary turbo codes. With a view to exploit a-priori probabilities from source statistics, a symbol level trellis is incorporated into the circular trellis of the non-binary turbo decoder. Reversible Variable Length Codes (RVLC) are used as the input source in all simulations. Results show that with JSCD, circular duo binary turbo codes provide an average gain of 0.4 dB at Bit Error Rate (BER) of 10^-5 as compared to conventional decoding of circular duo binary turbo codes. With circular triple binary turbo codes, JSCD provides a striking average gain of 3.5 dB at a BER of 10^-6 compared to conventional decoding of circular triple binary turbo codes.

Keywords

combined source-channel coding; error statistics; trellis codes; turbo codes; variable length codes; a priori probabilities; bit error rate; circular non binary turbo codes; circular trellis; joint source channel decoding; reversible variable length codes; source statistics; symbol level trellis; Bit error rate; Decoding; Equations; Gain; Iterative decoding; Joints; Turbo codes; JSCD — Joint Source Channel Decoding; Non Binary Turbo Codes; VLC — Variable Length Codes;

fLanguage

English

Publisher

ieee

Conference_Titel

AFRICON, 2013

Conference_Location

Pointe-Aux-Piments

ISSN

2153-0025

Print_ISBN

978-1-4673-5940-5

Type

conf

DOI

10.1109/AFRCON.2013.6757737

Filename

6757737