Rate-Compatible Protograph-Based LDPC Codes for Inter-Symbol Interference Channels.

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Bibliographic Details
Title: Rate-Compatible Protograph-Based LDPC Codes for Inter-Symbol Interference Channels.
Authors: Nguyen, Thuy Van, Nosratinia, Aria, Divsalar, Dariush
Source: IEEE Communications Letters; Aug2013, Vol. 17 Issue 8, p1632-1635, 4p
Abstract: This letter produces a family of rate-compatible protograph-based LDPC codes approaching the independent and uniformly distributed (i.u.d.) capacity of inter-symbol interference (ISI) channels. This problem is highly nontrivial due to the joint design of structured (protograph-based) LDPC codes and the state structure of ISI channels. We describe a method to design nested high-rate protograph codes by adding variable nodes to the protograph of a lower rate code. We then design a family of rate-compatible protograph codes using the extension method. The resulting protograph codes have iterative decoding thresholds close to the i.u.d. capacity. Our results are supported by numerical simulations. [ABSTRACT FROM PUBLISHER]
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Description
Abstract:This letter produces a family of rate-compatible protograph-based LDPC codes approaching the independent and uniformly distributed (i.u.d.) capacity of inter-symbol interference (ISI) channels. This problem is highly nontrivial due to the joint design of structured (protograph-based) LDPC codes and the state structure of ISI channels. We describe a method to design nested high-rate protograph codes by adding variable nodes to the protograph of a lower rate code. We then design a family of rate-compatible protograph codes using the extension method. The resulting protograph codes have iterative decoding thresholds close to the i.u.d. capacity. Our results are supported by numerical simulations. [ABSTRACT FROM PUBLISHER]
ISSN:10897798
DOI:10.1109/LCOMM.2013.060513.130498