Title :
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
fDate :
Oct. 29 2007-Nov. 1 2007
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;
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
DOI :
10.1109/IMOC.2007.4404367
