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Performance Evaluation of Impulse Radio UWB Systems with Pulse-Based Polarity Randomization in Asynchronous Multiuser Environments

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Author

  • S Gezici
  • E Fishler
  • H Kobayashi
  • H V Poor
  • Andreas Molisch

Summary, in English

The performance of a binary phase shift keyed random time-hopping impulse radio system with pulse-based polarity randomization is analyzed. The effects of multiple access interference are investigated for both chip-synchronous and asynchronous systems. It is shown that the performance of a chip-synchronous system is the same as that for the symbol-synchronous case studied in E. Fisher and H. V. Poor (Oct. 2-4, 2002). The asynchronous system is modelled as a chip-synchronous system with uniformly distributed timing jitter on the transmitted pulses of interfering users. This extends the analytical technique developed for the chip-synchronous case to the asynchronous case. An approximate closed-form expression for the probability of error, expressed in terms of the autocorrelation function of the transmitted pulse, is derived for the asynchronous case. The analysis shows that the chip-synchronous assumption can result in over-estimating the error probability, and hence that the system design based on this approximation will he on the safe side. The degree of over-estimation mainly depends on the autocorrelation function of the UWB pulse and signal-to-interference-plus-noise-ratio (SIR) of the system. Simulations studies support this approximate analysis.

Publishing year

2004

Language

English

Pages

908-913

Publication/Series

IEEE Wireless Communications and Networking Conference, 2004. WCNC.

Document type

Conference paper

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • broadband networks
  • correlation methods
  • error statistics
  • matched filters
  • phase shift keying
  • radio networks
  • radiofrequency interference
  • timing jitter

Conference name

IEEE Wireless Communications and Networking Conference, WCNC 2004

Conference date

2004-03-21 - 2004-03-25

Status

Published

ISBN/ISSN/Other

  • ISSN: 1558-2612
  • ISSN: 1525-3511
  • ISBN: 0-7803-8344-3