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New stop criterion using the absolute mean value of LLR difference for Turbo Codes  

Shim ByoungSup (Department of Electronic Engineering, Wonkwang University)
Lee Wanbum (Department of Electronic Engineering, Wonkwang University)
Jeong DaeHo (Department of Electronic Engineering, Wonkwang University)
Lim SoonJa (Department of Electronic Engineering, Wonkwang University)
Kim TaeHyung (Department of Electronic & Information, Iksan National College)
Kim HwanYong (Department of Electronic Engineering, Wonkwang University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.5, 2005 , pp. 39-46 More about this Journal
Abstract
It is well known the fact that turbo codes has better performance as the number of iteration and the interleaver size increases in the AWGN channel environment. However, as the number of iteration and the interleaver size are increased, it is required much delay and computation for iterative decoding. Therefore, it is important to devise an efficient criterion to stop the iteration process and prevent unnecessary computations and decoding delay. In this paper, it proposes the efficient iterative decoding stop criterion using the absolute mean value of LLR difference. It is verifying that the proposal iterative decoding stop criterion can be reduced the average iterative decoding number compared to conventional schemes with a negligible degradation of the error performance.
Keywords
Turbo Codes; Iterative decode; Stop criterion; Log-MAP;
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