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arXiv · 1306.6056

Rate-Compatible Protograph-based LDPC Codes for Inter-Symbol Interference Channels

Thuy Van Nguyen·Aria Nosratinia·Dariush Divsalar
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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.

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Thuy Van Nguyen, Aria Nosratinia, Dariush Divsalar. 2013-06-25. Rate-Compatible Protograph-based LDPC Codes for Inter-Symbol Interference Channels. https://arxiv.org/abs/1306.6056

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