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

Mikel Hernaez; Pedro Crespo; Javier Del Ser; Javier Garcia-Frias

doi:10.1109/LCOMM.2009.091289

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

Mikel Hernaez^*, Pedro Crespo, Javier Del Ser, Javier Garcia-Frias

^*Corresponding author for this work

AI

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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.

Original language	English
Pages (from-to)	788-790
Number of pages	3
Journal	IEEE Communications Letters
Volume	13
Issue number	10
DOIs	https://doi.org/10.1109/LCOMM.2009.091289
Publication status	Published - 2009

Keywords

Concatenated LDGM codes
Correlated sources
Gaussian broadcast channel
Superposition coding

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10.1109/LCOMM.2009.091289

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title = "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 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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AU - Hernaez, Mikel

AU - Crespo, Pedro

AU - Del Ser, Javier

AU - Garcia-Frias, Javier

PY - 2009

Y1 - 2009

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AB - 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.

KW - Concatenated LDGM codes

KW - Correlated sources

KW - Gaussian broadcast channel

KW - Superposition coding

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EP - 790

JO - IEEE Communications Letters

JF - IEEE Communications Letters

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ER -

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

Abstract

Keywords

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Erratum: Serially-concatenated LDGM codes for correlated sources over Gaussian broadcast channels (IEEE Communications Letters (2009) 13:10 (788-790))

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