Title :
A simplified method for turbo decoding over Rayleigh fading channels
Author :
Xu, Ke ; Wan, Jianwei ; Xu, Zhan
Author_Institution :
Dept. of Electr. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
In this paper, we investigate the signal-to-noise ratio (SNR) sensitivity of the Log-MAP turbo decoder over Rayleigh fading channels. It is shown that the use of the channel reliability factor proposed by Frenger is equivalent to an SNR underestimation when the channel estimate is not perfect. In addition, we propose s simplified method to compute the channel reliability factor, which leads to reduction of the computing complexity while causes no performance degradation.
Keywords :
Rayleigh channels; channel estimation; maximum likelihood decoding; telecommunication network reliability; turbo codes; Rayleigh fading channels; SNR; channel estimation; channel reliability factor; log-MAP decoding; signal-to-noise ratio; turbo decoding; Bit error rate; Channel estimation; Decoding; Fading; Iterative decoding; Reliability; Signal to noise ratio; Channel estimation; Log-MAP decoding; Rayleigh fading channels; signal-to-noise ratio (SNR); turbo codes;
Conference_Titel :
Signal Processing (ICSP), 2010 IEEE 10th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-5897-4
DOI :
10.1109/ICOSP.2010.5656487
