NDLI: Effect of Doppler spread in OFDM-based UWB systems

Content Provider	IEEE Xplore Digital Library
Author	Capoglu, I.R. Ye Li Swami, A.
Copyright Year	2002
Abstract	Orthogonal frequency division multiplexing (OFDM) can be used in ultrawideband (UWB) communications to deal with delay spread of UWB channels. Relative motion between transmitter, receiver, and scattering environment induces Doppler spread. Since Doppler shift is proportional to subcarrier frequency, the time-selective fading is subcarrier dependent. In a narrowband (NB) system, this dependence is negligible, and all subcarriers are subjected to the same time-selective fading. However, in a UWB system, different subcarriers will experience different fading. In this paper, intercarrier interference (ICI) caused by the relative motion between transmitter and receiver in OFDM-based UWB communications is investigated. An exact expression as well as bounds is derived for the degradation of performance measured by signal-to-interference ratio (SIR). A design example is given to illustrate the concepts developed in the paper.
Starting Page	2559
Ending Page	2567
Page Count	9
File Size	308129
File Format	PDF
ISSN	15361276
Volume Number	4
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading OFDM Transmitters Ultra wideband technology Delay Scattering Doppler shift Narrowband Niobium Interference ultrawideband (UWB) Doppler spread intercarrier interference (ICI) orthogonal frequency division multiplexing (OFDM) underwater communications
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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