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Generalized low-density codes with BCH constituents for full-diversity near-outage performance
Boutros, Joseph Jean; Zémor, Gilles; Guillén i Fàbregas, Albert; Biglieri, Ezio
Universitat Pompeu Fabra
Comunicació presentada en el International Symposium on Information Theory (ISIT '08), celebrat els dies 6, 7, 8, 9, 10 i 11 de juliol de 2008 a Toronto (Ontario, Canadà), organitzat per Institute of Electrical and Electronics Engineers (IEEE).
A new graph-based construction of generalized low density codes (GLD-Tanner) with binary BCH constituents is described. The proposed family of GLD codes is optimal on block erasure channels and quasi-optimal on block fading channels. Optimality is considered in the outage probability sense. A/nclassical GLD code for ergodic channels (e.g., the AWGN channel,/nthe i.i.d. Rayleigh fading channel, and the i.i.d. binary erasure channel) is built by connecting bitnodes and subcode nodes via a unique random edge permutation. In the proposed construction of full-diversity GLD codes (referred to as root GLD), bitnodes are divided into 4 classes, subcodes are divided into 2 classes, and finally both sides of the Tanner graph are linked via 4 random edge permutations. The study focuses on non-ergodic channels with two states and can be easily extended to channels with 3 states or more.
The work of Ezio Biglieri was supported by the STREP project "DA/nVINCI" within the 7th FP of the European Commission.
Comunicació sense fil, Sistemes de
© 2008 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works./nThe final published article can be found at http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4595094&tag=1
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