Sea surface micro-motion target Radon-linear contact transformation long-time phase-coherent accumulation detecting method
A micro-moving target, coherent accumulation technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of compensation performance limitation, reduce coherent accumulation gain, dispersion, etc., to improve SCR, increase coherent accumulation gain, increase The effect of estimation accuracy
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[0028] In order to explain the range migration and Doppler migration effect of the micro-moving target on the sea surface involved in the present invention, a radar echo modulation model of the micro-moving target on the sea surface is firstly given. The geometric relationship of the sea surface target observed by the shore-based sea-to-sea radar is as follows: figure 1 shown, including the target fixed reference frame C ref =(X, Y, Z) and target motion coordinate system C mov = (x, y, z).
[0029] ●Translation target micro-Doppler modulation model
[0030] In order to obtain high resolution and reduce the effective bandwidth, it is assumed that the coherent system radar transmits a linear frequency modulation (Linear Frequency Modulation, LFM) signal
[0031] s · i ( t ) = rect ( t ...
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