Performance of decision feedback equalizers in urban and indoor mobile channels

Weifeng Huang, Theodore S. Rappaport, Martin J. Feuerstein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents idealized computer simulation results of an equalizer using two-ray and measurement-based channel impulse response models. A decision feedback equalizer (DFE) with a recursive least squares (RLS) algorithm is used as the equalization scheme. The results show that adaptive equalization can significantly improve the bit-error-rate (BER) of a mobile system if the channel does not change too rapidly. The simulation shows that in a two-ray Rayleigh fading channel, If the delay of the second ray Is too small, then adaptive equalization will degrade the BER performance. The value of the delay at which the adaptive equalizer can improve the BER depends on the normalized Doppler frequency. Also, a mobile channel simulator is used to show how much the equalizer can Improve the BER in real world urban channels. The performance of adaptive equalization for indoor high data rate systems is abo evaluated. Finally, an equalization structure for n/4 DQPSK modulation is developed and simulation results are presented.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE Vehicular Technology Society, 42nd VTS Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages368-371
Number of pages4
ISBN (Electronic)0780306732
DOIs
StatePublished - Jan 1 1992
Event42nd IEEE Vehicular Technology Society Conference: Frontiers of Technology, VTS 1992 - Denver, United States
Duration: May 10 1992May 13 1992

Publication series

NameIEEE Vehicular Technology Conference
Volume1992-May
ISSN (Print)1550-2252

Conference

Conference42nd IEEE Vehicular Technology Society Conference: Frontiers of Technology, VTS 1992
CountryUnited States
CityDenver
Period5/10/925/13/92

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ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Huang, W., Rappaport, T. S., & Feuerstein, M. J. (1992). Performance of decision feedback equalizers in urban and indoor mobile channels. In Proceedings - IEEE Vehicular Technology Society, 42nd VTS Conference (pp. 368-371). [245377] (IEEE Vehicular Technology Conference; Vol. 1992-May). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/VETEC.1992.245377