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The tradeoff between processing gains of an impulse radio UWB system in the presence of timing jitter

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Author

  • Sinan Gezici
  • Andreas Molisch
  • H. Vincent Poor
  • Hisashi Kobayashi

Summary, in English

In time hopping impulse radio, N-f pulses of duration T. are transmitted for each information symbol. This gives rise to two types of processing gains: i) pulse combining gain, which is a factor N-f, and (ii) pulse spreading gain, which is N-c = T-f/T-c where T-f is the mean interval between two subsequent pulses. This paper investigates the tradeoff between these two types of processing gains in the presence of timing jitter. First, an additive white Gaussian noise (AWGN) channel is considered, and approximate closed-form expressions for bit error probability (BEP) are derived for impulse radio systems with and without pulse-based polarity randomization. Both symbol-synchronous and chip-synchronous scenarios are considered. The effects of multiple-access interference (MAI) and timing jitter on the selection of optimal system parameters are explained through theoretical analysis. Finally, a multipath scenario is considered, and the tradeoff between processing gains of a synchronous impulse radio system with pulse-based polarity randomization is analyzed. The effects of the timing jitter, MAI, and interframe interference (IFI) are investigated. Simulation, studies support the theoretical results.

Publishing year

2007

Language

English

Pages

1504-1515

Publication/Series

IEEE Transactions on Communications

Volume

55

Issue

8

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • inter-frame interference (IFI)
  • multiple-access interference (MAI)
  • impulse radio ultra wideband (IR-UWB)
  • timing jitter
  • Rake receiver

Status

Published

ISBN/ISSN/Other

  • ISSN: 0090-6778