High-speed stealth target detection method of polynomial Hough Fourier transform
A technology of Fourier transform and detection method, which is applied in the direction of measuring device, radio wave measurement system, radio wave reflection/re-radiation, etc., can solve the problem of ineffective coherent accumulation, increased system complexity, and large amount of calculations that are difficult to meet Real-time requirements and other issues
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[0038] The invention will be described in further detail below with reference to the accompanying drawings
[0039] Refer to attached figure 1 , the concrete steps of the present invention are as follows:
[0040] Step 1: First, according to the band-pass sampling theorem, select the sampling frequency f s ≥2B (B represents radar bandwidth), sample the signals of M pulse repetition periods to be accumulated in the wave gate, and obtain the sampled signal matrix S M×N (The row in S represents the echo signal sampling sequence of a certain pulse, and the columns represent the sampling points at the same position in the wave gate at different times); then S M×N Matched filtering is performed on each row of the signal in the signal to obtain the signal matrix S' after pulse compression M×N , S' M×N The calculation method of line m in is
[0041] S'(m,:)=IFFT{FFT(S(m,:))·[FFT(S t )] *}
[0042] Among them, FFT() means to perform fast Fourier transform on the signal in brack...
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