Title :
Bandwidth efficient parallel concatenated coding schemes
Author :
Benedetto, S. ; Divsalar, D. ; Montorsi, G. ; Pollara, F.
Author_Institution :
Dipartimento di Elettronica, Politecnico di Torino, Italy
fDate :
11/23/1995 12:00:00 AM
Abstract :
The authors propose a solution to the parallel concatenation of trellis codes with multilevel amplitude/phase modulations and a suitable iterative decoding structure. Examples are given for throughputs 2bit/s/Hz with 8PSK and 16QAM signal constellations. For parallel concatenated trellis codes in the examples, rate 2/3 and 4/5, 16-state binary convolutional codes with Gray code mapping are used. The performances of these codes are within 1 dB of the Shannon limit at a bit error probability of 10-6 for a given throughput. This outperforms all codes reported in the past for the same throughput
Keywords :
Gray codes; concatenated codes; convolutional codes; decoding; error statistics; iterative methods; phase modulation; phase shift keying; quadrature amplitude modulation; trellis codes; 16QAM; 8PSK; Gray code mapping; Shannon limit; binary convolutional codes; bit error probability; iterative decoding structure; multilevel amplitude/phase modulations; parallel concatenated coding schemes; signal constellations; trellis codes;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19951447
