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

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URI: https://hdl.handle.net/11556/3155
ISSN: 1089-7798
DOI: 10.1109/LCOMM.2009.091289
Publication date
2009
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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.
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Concatenated LDGM codes , Correlated sources , Gaussian broadcast channel , Superposition coding , Modeling and Simulation , Computer Science Applications , Electrical and Electronic Engineering
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journal article
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Hernaez , M , Crespo , P , Del Ser , J & Garcia-Frias , J 2009 , ' Serially-concatenated LDGM codes for correlated sources over gaussian broadcast channels ' , IEEE Communications Letters , vol. 13 , no. 10 , pp. 788-790 . https://doi.org/10.1109/LCOMM.2009.091289