Vehicle-mounted multi-resolution composite digital radar system
A multi-resolution, digital radar technology, applied in the radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problems of limiting the application of MA technology, insufficient multi-target resolution, etc., to avoid high Effects of side lobes, enhanced directivity, and improved angular resolution
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[0060] In the system of the present invention, the sub-arrays are symmetrical structures, and their phase centers are located at the center of the MRCA.
[0061] The steps of the method according to the present invention are described in detail below in stages.
[0062] In step 1-1, MRCA applied the uniform sparse array method, and the angular resolution of the uniform sparse array can be obtained by its half-power beamwidth ψ res = 2θ h to represent, where the half-power angle θ h can be approximated as shown in formula (8)
[0063]
[0064] where λ is the wavelength and L is the width of the sparse array. If the element spacing d is greater than the wavelength, grating lobes appear in the array mode, limiting its maximum multiple target discrimination angle θ m or the unambiguous target sector [θ 0 -θ m , θ 0 +θ m ], where θ 0 is the direction of the center of the unambiguous target. θ m related to the spacing d between components
[0065]
[0066] Therefore...
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