Iterative decoding for serial concatenation with wavelet encoding

Author

de Q.Silveira, L.G. ; Silveira, Luiz F Q ; Assis, Francisco M. ; Pinto, Ernesto L.

Author_Institution

Univ. Fed. de Campina Grande, Campina Grande

fYear

2007

fDate

Oct. 29 2007-Nov. 1 2007

Firstpage

743

Lastpage

747

Abstract

An iterative decoder for serial concatenations that have a wavelet encoder as the inner encoder is evaluated in this paper. In particular, a new approach for soft-input soft- output wavelet decoder is proposed, which consider an optimal soft demapping scheme recently proposed for wavelet-coded communication systems. Preliminary results of performance evaluation are presented, where a concatenation with a convolutional encoder over a flat fading Rayleigh channel is investigated. These results show the effectiveness of the proposed decoding technique and suggest that its is potentially useful as a new means to increase the performance benefits produced by wavelet coding in flat fading conditions over wireless channels.

Keywords

Rayleigh channels; concatenated codes; convolutional codes; iterative decoding; transform coding; wavelet transforms; convolutional encoder; flat fading Rayleigh channel; inner encoder; iterative decoding; optimal soft demapping scheme; serial concatenation; soft-input soft-output wavelet decoder; wavelet encoding; wavelet-coded communication systems; Channel coding; Convolution; Convolutional codes; Encoding; Fading; Helium; Iterative decoding; Rayleigh channels; Wavelet coefficients; Wireless communication; Rayleigh fading channels; SISO decoder; extrinsic information; iterative decoding; wavelet coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Optoelectronics Conference, 2007. IMOC 2007. SBMO/IEEE MTT-S International

Conference_Location

Brazil

Print_ISBN

978-1-4244-0661-6

Electronic_ISBN

978-1-4244-0661-6

Type

conf

DOI

10.1109/IMOC.2007.4404367

Filename

4404367