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Blind Equalization in OFDM Systems by Channel Shortening and Channel Diversity Exploitation

by Cang Yan, Emmanuel A Mwangosi, Naveed Ur Rehman
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 113 - Number 1
Year of Publication: 2015
Authors: Cang Yan, Emmanuel A Mwangosi, Naveed Ur Rehman
10.5120/19793-1573

Cang Yan, Emmanuel A Mwangosi, Naveed Ur Rehman . Blind Equalization in OFDM Systems by Channel Shortening and Channel Diversity Exploitation. International Journal of Computer Applications. 113, 1 ( March 2015), 28-32. DOI=10.5120/19793-1573

@article{ 10.5120/19793-1573,
author = { Cang Yan, Emmanuel A Mwangosi, Naveed Ur Rehman },
title = { Blind Equalization in OFDM Systems by Channel Shortening and Channel Diversity Exploitation },
journal = { International Journal of Computer Applications },
issue_date = { March 2015 },
volume = { 113 },
number = { 1 },
month = { March },
year = { 2015 },
issn = { 0975-8887 },
pages = { 28-32 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume113/number1/19793-1573/ },
doi = { 10.5120/19793-1573 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:49:51.581975+05:30
%A Cang Yan
%A Emmanuel A Mwangosi
%A Naveed Ur Rehman
%T Blind Equalization in OFDM Systems by Channel Shortening and Channel Diversity Exploitation
%J International Journal of Computer Applications
%@ 0975-8887
%V 113
%N 1
%P 28-32
%D 2015
%I Foundation of Computer Science (FCS), NY, USA
Abstract

We propose two alternative approaches for blind channel shortening to design time domain finite impulse response equalizer (TDE) in multicarrier single input, multiple output systems. The first approach we utilize the constant envelop of the transmitted signal called constant modulus (CM). Second approach is based on decision directed algorithm, where we update time domain equalizer using decision directed cost function. These cost function have been widely studied for single carrier systems, implementing them in multicarrier scenario is of great importance. Simulations shows they outperform classical multicarrier equalization by restoration of redundancy (MERRY) and Carrier nulling algorithm (CNA) that utilizes redundancies inherent in carriers in terms of bit error rate.

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Index Terms

Computer Science
Information Sciences

Keywords

Blind equalization Constant modulus algorithm decision directed algorithm SIMO OFDM.

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