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Blind Equalization Using Constant Modulus Algorithm and Multi-Modulus Algorithm in Wireless Communication Systems

by Ram Babu. T, P.Rajesh Kumar
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 1 - Number 3
Year of Publication: 2010
Authors: Ram Babu. T, P.Rajesh Kumar
10.5120/86-184

Ram Babu. T, P.Rajesh Kumar . Blind Equalization Using Constant Modulus Algorithm and Multi-Modulus Algorithm in Wireless Communication Systems. International Journal of Computer Applications. 1, 3 ( February 2010), 40-45. DOI=10.5120/86-184

@article{ 10.5120/86-184,
author = { Ram Babu. T, P.Rajesh Kumar },
title = { Blind Equalization Using Constant Modulus Algorithm and Multi-Modulus Algorithm in Wireless Communication Systems },
journal = { International Journal of Computer Applications },
issue_date = { February 2010 },
volume = { 1 },
number = { 3 },
month = { February },
year = { 2010 },
issn = { 0975-8887 },
pages = { 40-45 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume1/number3/86-184/ },
doi = { 10.5120/86-184 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T19:43:55.924555+05:30
%A Ram Babu. T
%A P.Rajesh Kumar
%T Blind Equalization Using Constant Modulus Algorithm and Multi-Modulus Algorithm in Wireless Communication Systems
%J International Journal of Computer Applications
%@ 0975-8887
%V 1
%N 3
%P 40-45
%D 2010
%I Foundation of Computer Science (FCS), NY, USA
Abstract

It is a method of adaptive multi-modulus equalization for an equalizer. A cost from a cost function is calculated according to a constant modulus algorithm (CMA). Equalizer coefficients are updated according to the cost, and modulus of each region is determined for a multi-modulus algorithm (MMA). The equalizer is switched to use the MMA when the cost reaches a first threshold. The MMA comprises several stages determined by thresholds, and the number of regions increases in every stage. The cost is calculated according to the MMA and modulus of each region. The equalizer coefficients are updated according to the cost, and modulus of each region is determined for the subsequent stage of the MMA. The equalizer is switched to the subsequent stage of the MMA when the MMA cost function output reaches the threshold corresponding to the current stage. The steps are repeated until the cost reaches a preset value. Then, the number of regions and equalizer coefficients are fixed to equalize the input signal.

References
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Index Terms

Computer Science
Information Sciences

Keywords

Equalization CMA MMA Cost function

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