Patent ID: 7733940

Claim:
A method of receiving a signal by detection of a carrier frequency, the method comprising: employing a first fast Fourier transform (FFT) combiner to determine the carrier frequency; driving the first FFT combiner with a first frequency generator; and employing at least one further FFT combiner; driving the at least one further FFT combiner with a second frequency generator, wherein the first and second frequency generators are mutually offset in frequency such that a sensitivity loss that is incurred by the at least one further FFT combiner has maxima at Doppler error values where a sensitivity loss that is incurred by the first FFT combiner has dips and the sensitivity loss that is incurred by the first FFT combiner has maxima at Doppler error values where the sensitivity loss that is incurred by the at least one further FFT combiner has dips, wherein the employing the at least one further FFT combiner with the first FFT combiner reduces a scalloping loss.