Digital detection method
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United States of America Patent
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Jun 5, 2018
Issued Date -
Feb 2, 2017
app pub date -
Apr 10, 2015
filing date -
Apr 18, 2014
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Abstract
A passive detection method implemented by a device comprising one or more sensors comprises a step of sampling signals received by each sensor using various sub-Nyquist sampling frequency values, a step of transforming the sampled signals to the frequency domain by discrete Fourier transform, the frequency pitch ΔF being chosen constant, and, for each time/frequency box, a step of calculating the normalized power in each reception channel, a step of calculating the quadratic sum of the calculated powers while taking into account the power of a possible parasitic signal, and a thresholding step carried out so as to ensure a given probability of false alarm.
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