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Title: Use of UWB impulse radio technology in in-car communications : power limits and optimization
Authors: Krebesz, TI
Kolumban, G
Tse, CK 
Lau, FCM 
Dong, HR
Keywords: Federal Communications Commission (FCC) compliance of ultrawide band (UWB) impulse radio (IR)
Intravehicular communications
UWB IR communications systems
Issue Date: 2017
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on vehicular technology, 2017, v. 66, no. 7, p. 6037-6049 How to cite?
Journal: IEEE transactions on vehicular technology 
Abstract: 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-and 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.
ISSN: 0018-9545
EISSN: 1939-9359
DOI: 10.1109/TVT.2017.2647849
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