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http://dx.doi.org/10.5573/ieie.2015.52.4.003

Adaptive Blind Equalization Controlled by Linearly Combining CME and Non-CME Errors  

Oh, Kil Nam (Dept. of Optical Communications Engineering, Gwangju University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.52, no.4, 2015 , pp. 3-8 More about this Journal
Abstract
In this paper, we propose a blind equalization algorithm based on the error signal linearly combined a constellation-matched error (CME) and a non-constellation-matched error (non-CME). The new error signal was designed to include the non-CME term for reaching initial convergence and the CME term for improving intersymbol interference (ISI) performance of output signals, and it controls the error terms through a combining factor. By controlling the error terms, it generates an appropriate error signal for equalization process and improves convergence speed and ISI cancellation performance compared to those of conventional algorithms. In the simulation for 64-QAM and 256-QAM signals under the multipath channel and additive noise conditions, the proposed method was superior to CMA and CMA+DD concurrent equalization.
Keywords
CME; non-CME; error signal; ISI; higher-order QAM;
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