Title :
New reduced complexity turbo-detector for highly selective long delay spread ISI channels: a solution for 4G mobile systems?
Author :
Berthet, A.O. ; Penthe, B. ; Visoz, R. ; Boutros, J.J.
Author_Institution :
Alcatel Space Industries, Nanterre, France
Abstract :
We investigate a new turbo-detector scheme. The data detection part of the iterative receiver is based on variants of full-state SOVE (soft-output Viterbi estimation) and SOVA (soft-output Viterbi algorithm) intersymbol interference (ISI) decoders. Those variants employ reduced-state techniques combined with generalized per-survivor processing. They offer a very good trade-off between performance and complexity even with long delay channels. Monte-Carlo simulation results in various severe propagation environments show that the proposed sub-optimal turbo-detector is usually 1.8 to 3 dB away from the optimal BCJR (Bahl-Cocke-Jelinek-Raviv) based one with a significant computational complexity reduction. Hence it appears as a possible candidate for future mobile radio communications with high bit rate transmission
Keywords :
Viterbi decoding; computational complexity; intersymbol interference; iterative decoding; maximum likelihood estimation; mobile radio; radio receivers; telecommunication channels; turbo codes; 4G mobile systems; ISI channels; complexity; data detection; generalized per-survivor processing; intersymbol interference decoders; iterative receiver; long delay channels; long delay spread channels; mobile radio communications; reduced complexity turbo-detector; reduced-state techniques; selective channels; soft-output Viterbi algorithm; soft-output Viterbi estimation; Aerospace industry; Communication industry; Computational complexity; Delay; Detectors; Intersymbol interference; Iterative decoding; Mobile communication; Telecommunications; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944975
