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Serially-concatenated LDGM codes for correlated sources over gaussian broadcast channels


Abstract:

We propose a superposition scheme, based on the use of serially-concatenated LDGM codes, for the transmission of spatially correlated sources over Gaussian broadcast chan...Show More

Abstract:

We propose a superposition scheme, based on the use of serially-concatenated LDGM codes, for the transmission of spatially correlated sources over Gaussian broadcast channels. The messages intended for each receiver are independently encoded using the same code. In this manner, a strong degree of correlation is kept between the encoded sequences, which are then modulated with different energies and symbol-wise added. By properly designing the encoding process, simulation results show that our proposed scheme easily outperforms the suboptimal theoretical limit assuming separation between source and channel coding.
Published in: IEEE Communications Letters ( Volume: 13, Issue: 10, October 2009)
Page(s): 788 - 790
Date of Publication: 16 October 2009

ISSN Information:

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (CEIT) and TECNUN, University of Navarra, San Sebastian, Spain
Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (CEIT) and TECNUN, University of Navarra, San Sebastian, Spain
Tecnalia Robotiker, Zamudio, Spain
University of Delaware, Newark, DE, USA

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (CEIT) and TECNUN, University of Navarra, San Sebastian, Spain
Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (CEIT) and TECNUN, University of Navarra, San Sebastian, Spain
Tecnalia Robotiker, Zamudio, Spain
University of Delaware, Newark, DE, USA

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