Delta-sigma modulator based spectrum sensing transceiver

Abstract

The demo illustrates the performance of energy detection spectrum sensing. Time domain energy detection will be shown. Spectrum sensing is crucial for Cognitive Radio Transceiver. The original system under-study in my work is based on a Continuous Time RF Delta Sigma modulator, In the demo — to have the whole concept validated using FPGA board — an emulation of the RF delta sigma modulator is used. The emulation is a discrete time low pass delta sigma modulator followed by an upsampler (zero order interpolator) then an upconverter (using image-rejection mixer) to mimic the output of the originally targeted RF Delta Sigma modulator.