Title :
A linear Log-MaP algorithm for turbo decoding over AWGN channels
Author :
Talakoub, Shahram ; Shahrrava, Behnam
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Windsor, Windsor, ON
Abstract :
A simplification of the Log-MAP algorithm for use in turbo decoders is presented. The simplified algorithm is based on the MacLaurin Series expansion of the logarithmic term in the Jacobian logarithmic function used in the Log-MAP algorithm. In terms of complexity the proposed algorithm can easily be implemented using adders and comparators as this is the case for the Max-Log-MAP algorithm. Also, simulation results show that the proposed algorithm has performance very close to the Log-MAP algorithm for turbo decoding.
Keywords :
AWGN channels; channel coding; linear codes; maximum likelihood decoding; turbo codes; AWGN channel; Jacobian logarithmic function; MacLaurin series expansion; linear log-MAP algorithm; max-log-MAP algorithm; turbo decoding; AWGN channels; Approximation algorithms; Binary phase shift keying; Concatenated codes; Iterative decoding; Jacobian matrices; Modulation coding; Performance gain; Phase modulation; Table lookup;
Conference_Titel :
Electro/Information Technology Conference, 2004. EIT 2004. IEEE
Conference_Location :
Milwaukee, WI
Print_ISBN :
978-0-7803-8750-8
Electronic_ISBN :
978-0-7803-8751-5
DOI :
10.1109/EIT.2004.4569395
