A closed-form derivation of self and multi-user interference for time-reversed UWB communications

K. Popovski, T. A. Wysocki, B. J. Wysocki

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Multipath degradation is a significant consideration for all wireless communication systems. A time-reversed UWB system harnesses the multipath channel to achieve temporal and spatial focusing through signal pre-filtering at the transmitter side. In cases where the RMS delay spread of a channel is larger than a user's transmitted pulse separation, inter-pulse, -frame, and -symbol interference may occur. Of even more concern is multi-user interference, which significantly reduces system performance. This paper presents closed-form expressions for self and multi-user interference for a UWB system utilizing a time-reversed approach. The influence of user multiplexing codes is taken to account through incorporation of a 'separation probability', which characterizes a family of hopping sequences. The standardized IEEE 802.15.3a channel model is applied, and the derived performances are compared with that of a simulated time hopped time-reversed UWB system.

Original languageEnglish (US)
Pages (from-to)775-788
Number of pages14
JournalComputers and Electrical Engineering
Volume36
Issue number4
DOIs
StatePublished - Jul 2010

Keywords

  • Inter-symbol interference
  • Multi-user interference
  • Pre-rake equalization
  • Time hopping
  • Time-reversed
  • UWB

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science(all)
  • Electrical and Electronic Engineering

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