Title :
A simplified log-MAP turbo decoder by fitting method
Author :
Zhang, Lin ; Yu, Shun-zheng
Author_Institution :
Dept. of Electron. & Commun. Eng., Sun Yat-Sen Univ., Guangzhou
Abstract :
This paper presents a simplified Log-MAP turbo decoder. The proposed SISO algorithm uses fitting method to calculate the correction function. BER performances of the simplified turbo decoder are simulated over AWGN and flat slow fading channel. Simulations based on 3GPP2 turbo encoder demonstrate that this simplified algorithm achieves a better compromise between the complexity and the performance. The coding gain of the simplified algorithm is 0.3-0.5dB higher than that of Max-Log-MAP turbo decoder, while the complexity is lower than that of Log-MAP algorithm
Keywords :
AWGN channels; computational complexity; error statistics; fading channels; maximum likelihood decoding; polynomial approximation; trellis codes; turbo codes; 3GPP2 turbo encoder; AWGN channel; BER performance; Max-Log-MAP turbo decoder; SISO algorithm; fitting method; flat slow fading channel; Availability; Bit error rate; Computational modeling; Decoding; Delay; Fading; Hardware; Logic gates; Performance gain; Sun;
Conference_Titel :
Advanced Communication Technology, 2005, ICACT 2005. The 7th International Conference on
Conference_Location :
Phoenix Park
DOI :
10.1109/ICACT.2005.246085
