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

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International Journal of Computer Applications
© 2015 by IJCA Journal
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 and Naveed Ur Rehman. Article: Blind Equalization in OFDM Systems by Channel Shortening and Channel Diversity Exploitation. International Journal of Computer Applications 113(1):28-32, March 2015. Full text available. BibTeX

@article{key:article,
	author = {Cang Yan and Emmanuel A Mwangosi and Naveed Ur Rehman},
	title = {Article: Blind Equalization in OFDM Systems by Channel Shortening and Channel Diversity Exploitation},
	journal = {International Journal of Computer Applications},
	year = {2015},
	volume = {113},
	number = {1},
	pages = {28-32},
	month = {March},
	note = {Full text available}
}

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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