Abstract
Long-time coherent integration method can improve the detection performance of weak targets, what just increase the residence time rather than increasing the power-aperture product. According to the radial velocity of the moving object, the coupling relationship between the walking range and Doppler frequency, an improved Radon-Fourier transform is proposed to achieve a two-dimensional space-time echo projected to low-dimensional parameter space, establishing a parameter space that covered the possible of radial velocity and range. Then the echo pulses are projected into this space, forming a "focus" of the peak, the coherent integration time to achieve the target of the "focus" process. Simulation results show the effectiveness of this method.
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