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

Authors:
Mikel Hernaez;Pedro Crespo;Javier Del Ser;Javier Garcia-Frias
Affiliations:
Centro de Estudios e Investigaciones Técnicas de Gipuzkoa, and TECNUN, University of Navarra, San Sebastian, Spain;Centro de Estudios e Investigaciones Técnicas de Gipuzkoa, and TECNUN, University of Navarra, San Sebastian, Spain;TECNALIA-Robotiker, Zamudio, Spain;University of Delaware, Newark, DE
Venue:
IEEE Communications Letters
Year:
2009

Citing 3
Cited 2

LDGM codes for channel coding and joint source-channel coding of correlated sources

EURASIP Journal on Applied Signal Processing
Comments on broadcast channels

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Factor graphs and the sum-product algorithm

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Erratum to "serially-concatenated LDGM codes for correlated sources over Gaussian broadcast channels"

IEEE Communications Letters
On the performance of single LDGM codes for iterative data fusion over the multiple access channel

MACOM'10 Proceedings of the Third international conference on Multiple access communications

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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 symbolwise 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.