From https://en.wikipedia.org/wiki/Ultra-wideband, it reads that
"In February 2002, the Federal Communication Commission (FCC) released an amendment (Part 15) that specifies the rules of UWB transmission and reception. According to this release, any signal with fractional bandwidth greater than 20% or having a bandwidth greater than 500 MHz is considered as an UWB signal. The FCC ruling also defines access to 7.5 GHz of unlicensed spectrum between 3.1 and 10.6 GHz that is made available for communication and measurement systems."
So, my understanding is that
(1) any signal with fractional bandwidth greater than 20% or having a bandwidth greater than 500 MHz is considered as an UWB signal, and
(2) the frequency band between 3.1 and 10.6 GHz is an unlicensed spectrum which can be used for UWB as well as for others for communication and measurement systems in USA.
In general, Ultra-Wideband (UWB) refers to a radio technology that uses a large “chunk” of the spectrum to transmit and receive data over short distances. The exact definition of UWB can vary depending on the application and the specific standards or regulations in use.
One common definition of UWB is based on the fractional bandwidth (FBW) of the transmission. In light of this definition, a system is considered UWB if the FBW is greater than 20%, or equivalently, if the -10 dB bandwidth is greater than 500 MHz.
According to the U.S. Federal Communications Commission (FCC), UWB systems operate on frequencies that cover a range from 3.1 GHz to 10.6 GHz. This range is known as the UWB frequency band, and it is reserved for UWB devices in the United States.[1,2]
So, to answer your question, a system with a fractional bandwidth greater than 50% would meet the definition of UWB based on the FBW criterion. However, in order to operate in the UWB frequency band defined by the FCC, the system would need to operate within the 3.1 GHz to 10.6 GHz frequency range. A thing to know about UWB is when you do localization based on angle-of-arrival [3,4], you will have some troubles referred to as beam squinting, where the array steering vector becomes frequency dependent. It is usually assumed frequency-independent in narrowband.
References:
[1]”Ultra-wideband (UWB) technology and its applications", J. Batra and N. Kumar, International Journal of Electronics, Vol. 97, No. 2, pp. 143-167, 2010.
[2]”Ultra-wideband technology and its applications", Federal Communications Commission (FCC), available at: https://www.fcc.gov/general/ultra-wideband-uwb-technology-and-its-applications.
[3] Bazzi, Ahmad, and Dirk Slock. "Robust Music Estimation Under Array Response Uncertainty." ICASSP 2020-2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2020.
[4] Bazzi, Ahmad, Dirk TM Slock, and Lisa Meilhac. "On Maximum Likelihood Angle of Arrival Estimation Using Orthogonal Projections." 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2018.
- Badges
- Science topic
- Similar topics
- Papers