Design of Nested LDGM-LDPC Codes for Compress-and-Forward in Relay Channel - Computer Science > Information TheoryReportar como inadecuado




Design of Nested LDGM-LDPC Codes for Compress-and-Forward in Relay Channel - Computer Science > Information Theory - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: A three terminal relay system with binary erasure channel BEC wasconsidered, in which a source forwarded information to a destination with arelay-s -assistance-. The nested LDGM Low-density generator-matrix -LDPClow-density parity-check was designed to realize Compress-and-forward CF atthe relay. LDGM coding compressed the received signals losslessly and LDPCrealized the binning for Slepian-Wolf coding. Firstly a practical coding schemewas proposed to achieve the cut-set bound on the capacity of the system,employing LDPC and Nested LDGM-LDPC codes at the source and relay respectively.Then, the degree distribution of LDGM and LDPC codes was optimized with a givenrate bound, which ensured that the iterative belief propagation BP decodingalgorithm at the destination was convergent. Finally, simulations results showthat the performance achieved based on nested codes is very close toSlepian-Wolf theoretical limit.



Autor: Zheng Bingbing, Jiang Lingge, He Chen, Wang Qingchuan

Fuente: https://arxiv.org/







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