A constrained approach to pre-compensation for TDD OFDM systems

MRG Butler, PN Fletcher, AR Nix, DR Bull

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2 Citations (Scopus)
225 Downloads (Pure)

Abstract

Pre-compensation techniques can be used to enhance the bit error rate (BER) performance of time division duplex (TDD) orthogonal frequency division multiplexing (OFDM) communication links. With pre-compensation at the transmitter, the power assigned to each subcarrier is varied according to the channel state information (CSI). This paper derives a pre-compensation algorithm for OFDM systems that use coherent quadrature phase shift keying (QPSK) modulation on each subcarrier. The algorithm attempts to minimize the received BER subject to a constraint on the transmitted signal power. In order to yield a closed-form solution, the minimization is based on an approximation of the BER function, and is sub-optimal. The performance of the algorithm is compared with the fully optimal solution. In addition, the possible exploitation of the technique within a wireless local area network (WLAN) is discussed.
Translated title of the contributionA constrained approach to pre-compensation for TDD OFDM systems
Original languageEnglish
Title of host publication53rd IEEE Vehicular Technology Conference
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages648 - 652
Number of pages5
Volume1
ISBN (Print)0780367286
DOIs
Publication statusPublished - May 2001
Event53rd Vehicular Technology Conference 2001 (VTC 2001-Spring) - Rhodes, Greece
Duration: 1 May 2001 → …

Conference

Conference53rd Vehicular Technology Conference 2001 (VTC 2001-Spring)
CountryGreece
CityRhodes
Period1/05/01 → …

Bibliographical note

Rose publication type: Conference contribution

Sponsorship: The financial support of Blue Wave Systems inc. and thc Engineering and Physical Sciences Research Council is gratefully acknowledged.

Terms of use: Copyright © 2001 IEEE. Reprinted from Proceedings of IEEE Vehicular Technology Conference, Spring 2001. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.


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Keywords

  • OFDM modulation
  • wireless LAN

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