Doppler wave beam sharpening rapid imaging method of mechanical scanning radar
A technology of mechanical scanning and imaging method, applied in the field of signal processing, can solve the problem that the DBS imaging method cannot be applied to mechanical scanning radar, etc., and achieve the effect of increasing the scanning rate of the antenna, reducing the possibility of distortion, and increasing the speed.
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[0037] refer to figure 1 , the specific implementation process of the present invention is as follows:
[0038] Step 1. Calculate the constant accumulated number of radar pulses.
[0039] Install the mechanical scanning radar on a plane flying at a constant speed, and the antenna speed v can be obtained θ , radar beamwidth Δθ and radar pulse repetition frequency f r , using these mechanical scanning radar operating parameters, calculate the constant radar pulse accumulation number M:
[0040] M = Δθ v θ · f r .
[0041] Step 2. Calculate the sharpening ratio of Doppler beam sharpening.
[0042] Due to the Doppler bandwidth Δf of the antenna d It increases with the increase of the antenna scan angle, so the Doppler bandwidth Δf of the antenna d The number of frequency points within also increases accordingly. In order to obtain subgraphs with ...
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