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

Författare:
Publiceringsår: 2007
Språk: Engelska
Sidor: 1504-1515
Publikation/Tidskrift/Serie: IEEE TRANSACTIONS ON COMMUNICATIONS
Volym: 55
Nummer: 8
Dokumenttyp: Artikel
Förlag: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Sammanfattning

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.

Disputation

Nyckelord

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

Övriga

Published
Yes
  • ISSN: 0090-6778

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