Patent ID: 8781401

Claim:
A system comprising: a counting module configured to count polarity reversals of samples of a signal, wherein the samples are generated during (i) a first period, (ii) a second period, and (iii) a third period, and generate (i) a first count, (ii) a second count, and (iii) a third count of the polarity reversals counted during the respective periods; a difference module configured to determine a first difference between (i) the first count and (ii) the second count, a second difference between (i) the second count and (ii) the third count, and a third difference between (i) the first difference and (ii) the second difference; and a radar module configured to determine variation in frequency of the signal based on (i) the first count and (ii) the second count, and determine a type of radar present in the signal based on one or more of (i) the third difference and (ii) the variation in the frequency of the signal.