Title :
Concatenated coding and iterative SOVA decoding with PR4 signaling
Author :
Ghrayeb, Ali ; Ryan, William E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ, USA
Abstract :
We modify the iterative soft-output Viterbi algorithm (SOVA) for partial response (PR) channel and examine its performance for parallel and serial concatenated codes on a precoded Class IV partial response (PR4) channel. We present a SOVA that differs slightly from what appears in the literature and compare the performance of the two versions. Code rates of the form k0/k0+1 (k0=4, 8, and 64) are considered. Our simulations indicate that the loss at Pb =10-5 suffered by the SOVA, relative to the APP algorithm, is at most 1.2 dB for parallel concatenations and at most 1.6 dB for serial concatenations
Keywords :
Viterbi decoding; channel coding; concatenated codes; convolutional codes; iterative decoding; partial response channels; telecommunication signalling; APP algorithm; PR4 signaling; channel coding; code performance; code rates; concatenated coding; iterative SOVA decoding; iterative soft-output Viterbi algorithm; parallel concatenated code; precoded Class IV partial response channel; recursive systematic convolutional encoders; serial concatenated code; simulations; turbo codes; AWGN channels; Concatenated codes; Contracts; Convolution; Convolutional codes; Degradation; Detectors; Iterative decoding; Turbo codes; Viterbi algorithm;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853566
