Title :
LDPC codes over channels with memory
Author :
Colavolpe, Giulio
Author_Institution :
Dipt. di Ingegneria dell´´Informazione, Parma Univ., Italy
Abstract :
In this paper, the problem of detection and decoding of low-density parity-check (LDPC) codes transmitted over channels with memory is addressed. A general method to build a factor graph which takes into account both the code constraints and the channel behavior is described and the a posteriori probabilities of the transmitted symbols are derived by using the sum-product algorithm. A noncoherent channel and a flat fading channel are considered as examples of application.
Keywords :
channel coding; demodulation; fading channels; graph theory; maximum likelihood decoding; maximum likelihood detection; parity check codes; LDPC codes; a posteriori probabilities; flat fading channel; low-density parity-check codes; noncoherent channel; sum-product algorithm; transmitted symbols; AWGN; Additive white noise; Decoding; Fading; Gaussian noise; Intersymbol interference; Memoryless systems; Parity check codes; Sum product algorithm; Turbo codes;
Conference_Titel :
Communications, 2004 IEEE International Conference on
Print_ISBN :
0-7803-8533-0
DOI :
10.1109/ICC.2004.1312603
