An efficient interference cancellation scheme for CP-free MIMO-OFDM systems

Chih Yuan Lin, Ta-Sung Lee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Conventional orthogonal frequency division multiplexing (OFDM) systems use cyclic prefix (CP) to protect signal from the multipath channel induced distortions. However, the presence of CP could greatly decrease the effective data rate. In this paper, an interference cancellation scheme based on the generalized sidelobe canceller (GSC) principle is proposed for interference suppression of CP-free multiple-input multiple-output (MIMO) OFDM systems. An associated reduced complexity implementation based on the partially adaptive (PA) scheme is also proposed by exploiting the structural information of the signal and interference signature matrices. As well, we study sampling error in the proposed system. Under the block transmission model, a simple sampling error estimation method is proposed. Whenever sampling error is known, the proposed GSC equalizer can be directly applied based on the timing offsetted system model. Simulation results show that the performance of the proposed solution is almost identical to that obtained by the conventional CP-based MIMO-OFDM system under either the synchronous or asynchronous scenario.

Original languageEnglish
Title of host publicationVTC 2005-Fall
Subtitle of host publicationMid Way Through the Decade - Technology Past, Present and Future
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages439-443
Number of pages5
ISBN (Electronic)0780391527
DOIs
StatePublished - 1 Jan 2005
Event62nd Vehicular Technology Conference, VTC 2005 - Dallas, United States
Duration: 25 Sep 200528 Sep 2005

Publication series

NameIEEE Vehicular Technology Conference
Volume1
ISSN (Print)1550-2252

Conference

Conference62nd Vehicular Technology Conference, VTC 2005
CountryUnited States
CityDallas
Period25/09/0528/09/05

Keywords

  • Generalized sidelobe canceller (GSC)
  • Interference suppression
  • MIMO-OFDM
  • Partial adaptivity (PA)

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