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A New Blind Equalization Scheme for QAM Systems Based on Fractionally-Spaced Equalizer

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2 Author(s)
Liu Shun-lan ; Hangzhou Dianzi Univ., Hangzhou ; Dai Ming-zeng

A new blind equalization scheme is proposed based on fractionally-spaced equalizer, which referred to concurrent modified square contour algorithm (MSCA) and a novel soft decision-directed (SDD) adaptation. This proposed blind equalization scheme (MSCA+SDD) may be viewed as operating a MSCA fractionally-spaced equalizer which provides good steady-state equalization performance and global convergence and a SDD fractionally-spaced equalizer which helps to accelerate convergence and reduce inter-symbol interference concurrently. Simulation using a fractionally-spaced equalizer for a practica microwave channel is evaluated to compare the proposed algorithm with the MSCA and SCA. Theoretical analysis and sim ulation results demonstrate that MSCA+SDD using fractionally spaced equalizer improves equalization performance by increaS' ing the convergence speed and decreasing the residual inter symbol interference.

Published in:

Communications, Circuits and Systems, 2007. ICCCAS 2007. International Conference on

Date of Conference:

11-13 July 2007

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