Patent ID: 8923771

Claim:
A method for identifying one or more frequency bands in a received signal, the method comprising: a) calculating a normalized wavelet product of the received signal, wherein the normalized wavelet product is: F N ( n )=| F ( n )|/Δ J where F ⁡ ( n ) = ∏ j = 1 J ⁢ W 2 j ⁢ P ⁡ ( n ) , W 2 j is the continuous wavelet transform having a scale of 2 j and P(n) is the power spectral density at subcarrier n of the received signal, and A is the mean power spectral density of the received signal calculated as follows: Δ = 1 N ⁢ ∑ n = 0 N - 1 ⁢ P ⁡ ( n ) ; b) setting a threshold for local maxima of the normalized wavelet product; and c) detecting one or more edges in the received signal based on local maxima of the normalized wavelet product which are greater than the threshold to identify one or more frequency bands in the received signal.