Sea surface small target detection method based on polarization signal multi-scale entropy characteristics
A technology for small target detection and multi-scale entropy, which is applied in measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation. The effect of improving performance and simple algorithm structure
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Embodiment 1
[0052] Please refer to figure 1 , a sea surface small target detection method based on the multi-scale entropy feature of the polarization signal, including the steps:
[0053] S1. Obtain radar echo data, and determine the maximum sliding window length of the radar echo data;
[0054] Step S1 is specifically:
[0055] Get the radar echo data of rb range cells {s i}(i=1,2,3...,rb), and determine the maximum sliding window length corresponding to the radar echo data when the multi-scale entropy converges.
[0056] The basis for judging the convergence of multi-scale entropy is:
[0057]
[0058] Among them, d represents the Euclidean distance between two vectors;
[0059] MSE means multi-scale entropy;
[0060] δ represents the threshold value, the value is 0.01;
[0061] τ represents the scale factor, the value is 20;
[0062] r=0.15*std{s}, where std{s} represents the standard deviation of random sequence s;
[0063] If the above judgment is true, the maximum sliding ...
Embodiment 2
[0089] The difference between this embodiment and Embodiment 1 is that this embodiment will further illustrate how to realize the above-mentioned sea surface small target detection method based on the multi-scale entropy feature of the polarization signal in combination with specific application scenarios:
[0090] 1. Determination of the maximum sliding window length;
[0091] Get the radar echo data of rb range cells {s i}(i=1,2,3...,rb), and determine the maximum sliding window length corresponding to the radar echo data when the multi-scale entropy converges.
[0092] The basis for judging the convergence of multi-scale entropy is:
[0093]
[0094] Among them, d represents the Euclidean distance between two vectors;
[0095] MSE means multi-scale entropy;
[0096] δ represents the threshold value, the value is 0.01;
[0097] τ represents the scale factor, the value is 20;
[0098] r=0.15*std{s}, where std{s} represents the standard deviation of random sequence s; ...
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