Use of UWB Impulse Radio Technology in In-Car Communications: Power Limits and Optimization

Tamas Istvan Krebesz, Geza Kolumban, Chi Kong Tse, Chung Ming Lau, Hairong Dong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)


In-car wireless data communications systems require a short-range unlicensed radio communications technology that causes a very low level of interference in the other, already deployed radio links and networks, offers low and medium data rate, can reuse the already occupied radio-frequency (RF) bands, and assures low probability of message collisions. Ultrawide band (UWB) impulse radio employs RF pulses with very short duration to carry the information; consequently, it is an optimal candidate for the in-car wireless communications and intravehicular wireless sensor networks. Data rate and shape of RF carrier pulse determine the performance of a UWB radio link. To limit the interference caused, the maximum power radiated by an UWB device is restricted by the Federal Communications Commission (FCC) in the U.S. Introducing a new mathematical model and starting from the FCC regulations, analytical expressions for the calculation of FCC power limits are derived here. It is shown that the low-A nd high-rate UWB impulse radio systems are peak and average power limited, respectively. The relationship between the mathematical model and the parameters of an UWB carrier pulse used in a built UWB radio is established. The performances of RF carrier pulses known from the literature are evaluated and compared. All expressions derived are verified by measurements.
Original languageEnglish
Article number7805295
Pages (from-to)6037-6049
Number of pages13
JournalIEEE Transactions on Vehicular Technology
Issue number7
Publication statusPublished - 1 Jul 2017


  • Federal Communications Commission (FCC) compliance of ultrawide band (UWB) impulse radio (IR)
  • intravehicular communications
  • UWB IR communications systems

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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