Iterative methods for cancellation of intercarrier interference in OFDM systems
Författare
Summary, in English
We consider orthogonal frequency-division multiplexing systems with intercarrier interference (ICI) due to insufficient cyclic prefix and/or temporal variations. Intersymbol interference (ISI) and ICI lead to an error floor in conventional receivers. We suggest two techniques for the equalization of ICI. The first, called "operator-perturbation technique" is an iterative technique for the inversion of a linear system of equations. Alternatively, we show that serial or parallel interference cancellation can be used to drastically reduce the error floor. Simulations show that, depending on the SNR and the origin of the ICI, one of the schemes performs best. In all cases, our schemes lead to a drastic reduction of the bit error rate.
Publiceringsår
2007
Språk
Engelska
Sidor
2158-2167
Publikation/Tidskrift/Serie
IEEE Transactions on Vehicular Technology
Volym
56
Issue
4
Dokumenttyp
Artikel i tidskrift
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Nyckelord
- orthogonal frequency-division multiplexing (OFDM)
- iterative algorithms
- intersymbol interference (ISI)
- cancellation
- interference
- cyclic prefix (CP)
- intercarrier interference (ICI)
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1939-9359