Patent ID: 8901993
Filing Date: 2014-12-02
Classification: G01L,H03K

Abstract:
1. A method for processing a high frequency signal, the high frequency signal comprising a reference signal operating at a predetermined fixed frequency and a fixed amplitude, the reference signal modulated by an unknown modulation signal, the method reproducing the unknown modulation signal in the presence of noise that also modulates the reference signal, the method comprising: converting the high frequency signal to N digital samples during a duration of a first predetermined time segment; converting the high frequency signal to N digital samples during at least one additional predetermined time segment, each additional predetermined time segment having a duration corresponding to the duration of the first predetermined time segment; averaging each digital sample in the first predetermined time segment with a corresponding digital sample in each additional time segment to generate N averaged samples; converting the reference signal to N digital samples during a time segment having a duration corresponding to the duration of the first predetermined time segment; normalizing the N digital samples of the reference signal with a maximum amplitude of the N digital samples of the reference signal to generate N normalized samples of the reference signal; multiplying each of the N normalized samples with a corresponding one of the N averaged samples to generate N digital products; averaging the N digital products to generate an average product; and generating an output signal responsive to the average product, the output signal representing the unknown modulation signal.