Adaptive threshold signal detection method with known duty ratio
An adaptive threshold and signal detection technology, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of large amount of calculation, weak signal detection effect, and weak signal detection effect, so as to reduce false alarms The effect of probability
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[0030] Below, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0031] Such as figure 1 As shown, in the principle of the signal detection method of the present invention, since unknown noise is superimposed in the filtered envelope signal in the figure, how to determine the amplitude V of the signal in the noise-containing waveform H (i.e. high level) and the noise amplitude V L (low level) also becomes an important issue. For this reason, a statistical method can be used, that is, to solve the first-order moment μ and second-order moment V of the above-mentioned signals respectively. It can be known from derivation that the first-order moment and the amplitude V of the signal H (i.e. high level) and the noise amplitude V L (low level) respectively have the following relationship:
[0032]
[0033] Therefore, by solving the above binary quadratic equation, the values of high level and low level c...
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