Patent ID: 7590398

Claim:
A method of finding digitally modulated signals, wherein each of the digitally modulated signals has a corresponding frequency in a frequency spectrum, the method comprising the following steps: a) stepping through the frequency spectrum by frequency increments; b) testing each frequency increment for timing lock; and, c) determining that one of the digitally modulated signals is found at each frequency increment where timing lock is detected as a result of step b), wherein step c) comprises the step of determining a center frequency of a digitally modulated signal corresponding to each frequency increment where timing lock is found as a result of step b), wherein the frequency increments are first frequency increments, and wherein the center frequency determining step comprises the following steps: estimating the center frequency of the corresponding digitally modulated signal; and, determining a true center frequency of the corresponding digitally modulated signal by performing a zig-zag frequency search from the estimated center frequency using a plurality of second frequency increments, wherein each of the second frequency increments is less than the first frequency increments.