An Interference Cancellation Scheme for TFI-OFDM in Time-Variant Large Delay Spread Channel
Loading...
Date
2009-04
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
Abstract
In the mobile radio environment, signals are usually impaired by fading and multipath delay phenomenon. In such channels, severe fading of the signal amplitude and inter-symbol-interference (ISI) due to the frequency selectivity of the channel cause an unacceptable degradation of error performance. Orthogonal frequency division multiplexing (OFDM) is an efficient scheme to mitigate the effect of multipath channel. Since it eliminates ISI by inserting guard interval (GI) longer than the delay spread of the channel. In general, the GI is usually designed to be longer than the delay spread of the channel, and is decided after channel measurements in the desired implementation scenario. However, the maximum delay spread is longer than GI, the system performance is significantly degraded. The conventional time-frequency interferometry (TFI) for OFDM does not consider timevariant channel with large delay spread. In this paper, we focus on the large delay spread channel and propose the ISI and inter-carrier-interference (ICI) compensation method for TFI-OFDM.
Description
Citation
Radioengineering. 2009, vol. 18, č. 1, s. 75-82. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2009/09_01_075_082.pdf
http://www.radioeng.cz/fulltexts/2009/09_01_075_082.pdf
Document type
Peer-reviewed
Document version
Published version
Date of access to the full text
Language of document
en