FREQUENCY SELECTIVE RADIO SENSOR AND A METHOD THEREOF

摘要

An efficient radio sensor and a method thereof. The radio sensor includes a first frequency tracking block (FTB) (110-i) for tracking an input narrowband signal within a predefined frequency range, wherein the first FTB is preset to a first initial frequency; a second FTB (110-j) for tracking the input narrowband signal within a predefined frequency range, wherein the second FTB is preset to a second initial frequency; a subtractor (130) for subtracting an output value of the first FTB (110-i) from an output value of the second FTB (110-j); and a comparator (140) for applying a convergence test on an output of the subtractor (130) to determine if the input narrowband signal is present.