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http://dx.doi.org/10.7840/kics.2016.41.12.1736

Joint Performance of Demodulation and Decoding with Regard to Log-Likelihood Ratio Approximation  

Park, Sung-Joon (Dept. of Electronic Engineering, Gangneung-Wonju National University)
Jo, Myung-Suk (Dept. of Electronic Engineering, Gangneung-Wonju National University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.41, no.12, 2016 , pp. 1736-1738 More about this Journal
Abstract
In modern digital communication systems adapting high-order modulation and high performance channel code, log-likelihood ratios involving the repeated calculations of the logarithm of sum of exponential functions are necessary for demodulation and decoding. In this paper, the approximation methods called Min and MinC are applied to demodulation and decoding together and their complexity and joint performance are analyzed.
Keywords
High-Order Modulation; Quadrature Amplitude Modulation; Iterative Decoding; Log-Likelihood Ratio Approximation;
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