The satellite and radar applications are co-existing in these mm-wave spectra, and thus any licence-exempt use of this spectra must first ascertain that the spectra to be used is not already in use by the so called "primary users". Furthermore, the millimetre-wave (mm-wave) spectrum on 28GHz, 39GHz, 60GHz with at least 1GHz bandwidth are being considered to be further unitised to cope with high data rate wireless applications and services demanded by users. These spectra of 320MHz bandwidth have enabled the transition from research on cognitive radio theory into practical applications.
BANDWIDTH SIGNAL TV
Driven by the scarcity of spectrum, the UK communications regulator (Ofcom) has made an innovative licence-exempt spectrum sharing on the ultra-high frequency (UHF) TV bands in January 2016, which is the first of its kind worldwide. The exorbitant auction prices, e.g., £2.3 Billion for 4G spectrum in the UK, highlights the strength of the competitive market forces but also the scarcity of this precious resource. These data rates are empirically linked to radio spectrum availability. GBSense: GHz Bandwidth Sensing from Smart Antennas to Sub-Nyquist Signal Processingĭata rate for exchanging mobile information among people, machines and things has been exponentially increasing over the past decade.
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