DocumentCode :
3476489
Title :
A novel bandwidth efficient coding scheme employing turbo codes
Author :
Robertson, Patrick ; Wörz, Thomas
Author_Institution :
Inst. for Commun. Technol., German Aerosp. Res. Establ., Wessling, Germany
Volume :
2
fYear :
1996
fDate :
23-27 Jun 1996
Firstpage :
962
Abstract :
We have investigated a novel bandwidth efficient channel coding scheme that has a code structure similar to binary turbo codes but employs Ungerboeck codes as component codes. The combination of turbo codes with powerful bandwidth efficient component codes leads to a straightforward encoder structure and allows iterative decoding in analogy to the binary turbo decoder. However, certain special conditions need to be met at the encoder, and the iterative decoder needs to be adapted to the decoding of the component Ungerboeck codes. The scheme has been investigated for 8 PSK and 16 QAM modulation, for which a first attempt at component code optimization was performed. Simulation results are presented and the scheme is compared with Ungerboeck codes on their own and also turbo codes with Gray mapping. The results show that the novel scheme is markedly superior at comparable complexity
Keywords :
Gray codes; channel coding; concatenated codes; convolutional codes; decoding; interleaved codes; phase shift keying; quadrature amplitude modulation; trellis coded modulation; 16 QAM; 8 PSK; Gray mapping; TCM; Ungerboeck codes; bandwidth efficient coding scheme; binary turbo decoder; channel coding; complexity; component code optimization; encoder structure; interleaver; iterative decoding; turbo codes; Bandwidth; Channel coding; Communications technology; Convolutional codes; Euclidean distance; Feedback; Interleaved codes; Iterative decoding; Modulation coding; Turbo codes;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, 1996. ICC '96, Conference Record, Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-3250-4
Type :
conf
DOI :
10.1109/ICC.1996.541354
Filename :
541354
Link To Document :
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