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A Design of Adaptive Channel Estimate Algorithm for ICS Repeater  

Lee, Suk-Hui (Dept. of Electronics Eng. Dankook University)
Song, Ho-Sup (Dept. of Electronics Eng. Dankook University)
Bang, Sung-Il (Dept. of Electronics Eng. Dankook University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.3, 2009 , pp. 19-25 More about this Journal
Abstract
In this thesis, design effective elimination interference algorithm of ICS repeat system for repeater that improve frequency efficiency. Error convergence speed and accuracy of LMS Algorithm are influenced by reference signal. For improve LMS Algorithm, suggest Adaptive channel estimate algorithm. For using channel characteristic, adaptive channel estimate algorithm make reference signal similar interference signal by convolution operation and complement LMS algorithm demerit. For make channel similar piratical channel, apply Jake's Rayleigh multi-path model that random five path with 130Hz Doppler frequency. LMS algorithm and suggested adaptive channel estimate algorithm that have 16 taps apply to ICS repeat system under Rayleigh multi-path channel, so simulate with MATLAB. According to simulate, ICS repeat system with LMS algorithm show -40dB square error convergent after 150 datas iteration and ICS repeat system with adaptive channel estimate algorithm show -80dB square error convergent after 200 datas iteration. Analyze simulation result, suggested adaptive channel estimate algorithm show more three times iteration performance than LMS algorithm, and 40dB accuracy.
Keywords
Interference cancellation; Repeater; Convolution; Channel estimation; LMS algorithm;
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