naa a22 4500 510794440 CHVBK 20180411083331.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11277-012-0578-6 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0578-6 Novel Generalized max* Approximation Method for Simplified Decoding of Turbo and TTCM Codes [Elektronische Daten] [Stylianos Papaharalabos, Michal Sybis, Piotr Tyczka, P. Mathiopoulos] A novel method for approximating the optimal max* operator used in Log- MAP decoding of turbo and turbo trellis-coded modulation (TTCM) codes is proposed being derived from a well-known inequality, which has not been published before. The max* operation is generalized, for the first time, and performed on n > 2 rather than n =2 arguments, as it is the conventional approach. Complexity comparisons reveal a significant reduction in the number of operations required per decoding step for the proposed approximation, as compared with the optimal Log-MAP algorithm. Performance evaluation results are presented for both turbo and TTCM codes, showing the near optimal performance of the novel approximation method in both the additive white Gaussian noise (AWGN) and uncorrelated, i.e. fully interleaved, Rayleigh fading channels. Springer Science+Business Media, LLC., 2012 Turbo codes nationallicence TTCM codes nationallicence Decoding algorithms nationallicence Papaharalabos Stylianos Institute for Space Applications and Remote Sensing (ISARS), National Observatory of Athens, Metaxa and Vas. Pavlou Str., Palaia Penteli, 15236, Athens, Greece aut Sybis Michal Chair of Wireless Communications Poznan, University of Technology, ul. Polanka 3, 60-965, Poznan, Poland aut Tyczka Piotr Chair of Wireless Communications Poznan, University of Technology, ul. Polanka 3, 60-965, Poznan, Poland aut Mathiopoulos P. Institute for Space Applications and Remote Sensing (ISARS), National Observatory of Athens, Metaxa and Vas. Pavlou Str., Palaia Penteli, 15236, Athens, Greece aut Wireless Personal Communications Springer US; http://www.springer-ny.com 69/1(2013-03-01), 373-386 0929-6212 69:1<373 2013 69 11277 https://doi.org/10.1007/s11277-012-0578-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0578-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Papaharalabos Stylianos Institute for Space Applications and Remote Sensing (ISARS), National Observatory of Athens, Metaxa and Vas. Pavlou Str., Palaia Penteli, 15236, Athens, Greece aut NATIONALLICENCE 700 1- Sybis Michal Chair of Wireless Communications Poznan, University of Technology, ul. Polanka 3, 60-965, Poznan, Poland aut NATIONALLICENCE 700 1- Tyczka Piotr Chair of Wireless Communications Poznan, University of Technology, ul. Polanka 3, 60-965, Poznan, Poland aut NATIONALLICENCE 700 1- Mathiopoulos P. Institute for Space Applications and Remote Sensing (ISARS), National Observatory of Athens, Metaxa and Vas. Pavlou Str., Palaia Penteli, 15236, Athens, Greece aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 69/1(2013-03-01), 373-386 0929-6212 69:1<373 2013 69 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer