Communications of the ACM
Qosmos: Cognitive Radio Technology Optimises se of Scarce Spectrum
The primary objective of QoSMOS is to develop a framework for Cognitive Radio systems and to develop and prove critical technologies using a test-bed.
Credit: QoSMOS project consortium
The European QoSMOS project addresses the problems of scarcity and cost commonly associated with the need for more radio spectrum by developing cognitive radio technology that dynamically optimizes the use of radio spectrum through the use of under-utilized portions of the spectrum and sharing spectrum across devices.
The researchers developed a central manager that controls the spectrum portfolio in real time for a region or country, a resource manager that allocates the spectrum to individual systems and senses the environment, and a cognitive radio terminal.
The researchers also developed a prototype transceiver to generate Filter Bank Multicarrier (FBMC) transmission waveforms, which is expected to replace Orthogonal Frequency Division Multiplexing technology. With FBMC transmission, spectrum is compiled into rectangular blocks so that it is tightly packed for more efficient spectrum use.
An early pilot project of the QoSMOS technology used some of the technology used to access TV white spaces, which are unused spaces in the UHF band allocated to TV broadcasters. However, without intelligent spectrum management, interference by secondary spectrum users could degrade broadcast quality for viewers.
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