Fast adjustable spectrum sensing circuit for cognitive radio applications

Abstract

A fast and adjustable spectrum sensing method is proposed using a phase frequency detector for cognitive radio applications. Using this method, spectral sensing can be done in a very short time by a low-cost, low-power circuit, compared with available implemented methods.Different aspects of sensing procedure in different situations are investigated including frequency sweep time and system errors. Accurate operation of this method is verified through simulations, and comparison with other methods shows faster sweep rates.