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Multi-nodal spectrum sensing is a promising approach to robust cognitive radio networks, which provides increased adaptability to database-anchored sharing approaches. Yet its commercially viable implementation requires compact, low-cost, flexible sensing receivers. This paper describes an implementation approach relying on a fully differential 0.25 μm SiGe:C BiCMOS low-noise down-converter RFIC in the front-end, which covers 0.3-6 GHz. Its quadrature outputs are processed in a commercially available baseband processor that combines dual channel 14-bit, 250 MS/s analog to digital converters (ADC) with a Virtex 6 FPGA. The design and implementation status of the system will be described, as well as its validation under realistic noise and interference conditions, sensing white spaces in the UHF TV band.
Date of Conference: 3-5 Oct. 2012