NDLI: Adaptive OFDM with channel predictor over frequency-selective and rapid fading channel

Content Provider	IEEE Xplore Digital Library
Author	Tae Jin Hwang Ho Seon Hwang Heung Ki Balik
Copyright Year	2003
Description	Author affiliation: Dept. of Electron. Eng., Chonbuk Nat. Univ., Jeonju, South Korea (Tae Jin Hwang; Ho Seon Hwang)
Abstract	In this paper, we present an adaptive modulation technique for orthogonal frequency division multiplexing (OFDM) and enhance the performance of adaptive OFDM using a novel channel prediction. Adaptive modulation technique has been shown to achieve reliable high-rate data transmission over frequency-selective fading channel when OFDM is employed. This scheme requires the accurate channel information between two stations for a better performance. In an outdoor high mobility environment, most of adaptive OFDM systems have to be given the channel information transmitted from the receiver. Even if it is possible, there is some delay. Moreover, the channel impulse response between two stations is very rapidly varied. If the channel information is obsolete at the time of transmission, then poor system performance is the result. In order to solve this problem, we propose adaptive OFDM with channel predictor over frequency-selective and rapid fading channel for broadband wireless communications. Our proposal mitigates the effect of channel delay. Robust approach is less sensitive to outdated channel information. Performance results show that the proposed scheme can achieve considerable performance enhancement.
Sponsorship	IEEE Commun. Soc
Starting Page	859
Ending Page	863
File Size	431669
Page Count	5
File Format	PDF
ISBN	0780378229
DOI	10.1109/PIMRC.2003.1264395
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-07
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM modulation Data communication Frequency-selective fading channels Adaptive systems System performance Broadband communication Wireless communication Proposals Delay effects Robustness
Content Type	Text
Resource Type	Article

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