Modeling of multiple access interference and BER derivation for TH and DS UWB multiple access systems

S. Niranjayan*, A. Nallanathan, B. Kannan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

A novel analytical method is introduced for exact statistical modeling of multiple access interference (MAI), in time hopping pulse position modulation and pulse amplitude modulation (TH-PPM and TH-PAM) ultra wideband (UWB) systems operating in additive white Gaussian noise (AWGN) channels. Based on this method, exact bit error rates (BER) are expressed in simple formulas. In a similar fashion, the exact BER of direct sequence (DS) UWB is also derived for PAM modulation. The proposed modeling of MAI considers complete asynchronism in user access, and is also suitable for accurately Modeling the MAI components contributed by individual paths in channels with Poisson arrivals, based on the time variables. We further extend this method to derive general expressions for the BER performance in log-normal fading multi-path channels. In the course of, these derivations, we also introduce a more accurate numerical approach to evaluate the characteristic function (CF) of a lognormal random variable.

Original languageEnglish
Pages (from-to)2794-2804
Number of pages11
JournalIEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Volume5
Issue number10
DOIs
Publication statusPublished - Oct 2006

Keywords

  • multiple access interference (MAI)
  • performance evaluation
  • UWB
  • LOGNORMAL RANDOM-VARIABLES
  • PERFORMANCE
  • PPM
  • CHANNELS
  • SUM

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