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http://dx.doi.org/10.5515/KJKIEES.2011.22.10.1020

M-QAM Symbol Remapping Using LLR Soft Bit Information for Iterative Equalization  

Kim, Geun-Bae (Department of Electronics and Computer Engineering, Hanyang University)
Park, Sang-Kyu (Department of Electronics and Computer Engineering, Hanyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.10, 2011 , pp. 1020-1023 More about this Journal
Abstract
In this paper, we present a symbol remapping method of BRGC M-ary QAM signal by using LLR soft bit decision information which is obtained after iterative decoding process. In order to reconstruct estimated transmitted signal constellation, we have to use exponential or hyperbolic tangent(tanh) function resulting in high implementation complexity. The BRGC mapping rule enables us to use a recursive operation. In addtion, we reduce the implementing complexity by using a curve fitting algorithm.
Keywords
BRGC; QAM; Remapping; Iterative Equalization; LLR;
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