Wideband spectrum probe for distributed measurements in cellular band

One of the foremost critical design problems in cognitive radios is the need to process wide bandwidth and reliably detect the presence of primary users. This places significant requirements on sensitivity, dynamic range and linearity of the RF front-end. In order to counter effects of different adverse scenario of sensing channel it is necessary to perform distributed measurements to detect the primary user with high reliability. This paper presents the architecture of a sensing probe for wideband measurement and distributed measurement method to measure, characterize and model the utilization of the spectrum. Here, we have presented the sample spectrum measurement result using described sensing probe in cellular band.