Ultra-wideband impulse radio systems with multiple pulse types

Sinan Gezici, Zafer Sahinoglu, Hisashi Kobayashi, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


In an ultra-wideband (UWB) impulse radio (IR) system, a number of pulses, each transmitted in an interval called a "frame," is employed to represent one information symbol. Conventionally, a single type of UWB pulse is used in all frames of all users. In this paper, IR systems with multiple types of UWB pulses are considered, where different types of pulses can be used in different frames by different users. Both stored-reference (SR) and transmitted-reference (TR) systems are considered. First, the spectral properties of a multipulse IR system with polarity randomization is investigated. It is shown that the average power spectral density is the average of the spectral contents of different pulse shapes. Then, approximate closed-form expressions for the bit-error probability of a multipulse SR-IR system are derived for Rake receivers in asynchronous multiuser environments. The effects of both interframe interference (IFI) and multiple-access interference (MAI) are analyzed. The theoretical and simulation results indicate that SR-IR systems that are more robust against IFI and MAI than a "conventional" SR-IR system can be designed with multiple types of ultra-wideband pulses. Finally, extensions to multipulse TR-IR systems are briefly described.

Original languageEnglish (US)
Pages (from-to)892-898
Number of pages7
JournalIEEE Journal on Selected Areas in Communications
Issue number4 I
StatePublished - Apr 2006

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


  • Multipulse impulse radio (IR)
  • Performance analysis
  • Stored-reference (SR)
  • Transmitted-reference (TR)
  • Ultra-wideband (UWB)


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