NDLI: Channel equalization using one-tap DFE for wireless OFDM systems with ICI and ISI

Content Provider	IEEE Xplore Digital Library
Author	Yi Sun Lang Tong
Copyright Year	1999
Description	Author affiliation: Dept. of Electr. Eng., City Coll. of New York, NY, USA (Yi Sun)
Abstract	In an OFDM system for wireless communications, a guard interval longer than channel delay has to be used to avoid interchannel interference (ICI) and intersymbol interference (ISI), and so the multiplexed subchannels can be decoupled by the discrete Fourier transform (DFT). However, this ICI- and ISI-free OFDM system reduces the efficiency of bandwidth usage and prevents the use of sufficient statistics in channel equalization. In this paper, we consider the OFDM system that achieves one hundred percent efficiency of bandwidth usage and uses sufficient statistic. A one-tap decision feedback equalizer (DFE) is proposed. It is demonstrated that though occupying narrower bandwidth, the one-tap DFE based, ICI and ISI OFDM system achieves lower symbol error rate and higher mutual information between input of decision device and transmitted symbols.
Starting Page	146
Ending Page	149
File Size	379433
Page Count	4
File Format	PDF
ISBN	0780355997
DOI	10.1109/SPAWC.1999.783040
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-05-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision feedback equalizers OFDM Intersymbol interference Bandwidth Discrete Fourier transforms Statistics Wireless communication Delay Interchannel interference Error analysis
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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