Cancellation technique to reduce intercarrier interference in OFDM

Orthogonal frequency division multiplexing (OFDM) systems are sensitive to frequency errors, which cause intercarrier interference among subcarriers. A new cancellation method to reduce the effects of frequency offset errors is presented. The main feature is to map each data symbol a^sub k^ which is...

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Bibliographic Details
Published inElectronics letters Vol. 36; no. 25; p. 1
Main Authors Sathananthan, K, Rajatheva, R M A P, Slimane, S B
Format Journal Article
LanguageEnglish
Published Stevenage John Wiley & Sons, Inc 07.12.2000
Subjects
Cancellation
Channels
Error detection
Gain
Interference
Orthogonal Frequency Division Multiplexing
Subcarriers
Symbols
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Summary:Orthogonal frequency division multiplexing (OFDM) systems are sensitive to frequency errors, which cause intercarrier interference among subcarriers. A new cancellation method to reduce the effects of frequency offset errors is presented. The main feature is to map each data symbol a^sub k^ which is to be transmitted onto a pair of non-adjacent subcarriers, with weightings +1 and -1, rather than to a single subcarrier. The carrier-to-interference ratio gain of the proposed method over normal OFDM varies between 10 to 30dB. This method also offers a frequency diversity effect in a multipath fading channel.
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ISSN:0013-5194
1350-911X