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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

Pending Publication Date: 2020-07-10
江苏协和电子股份有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

Nevertheless, MA digital beam radar has the disadvantage of insufficient multi-target resolution capability, which greatly limits the application of MA technology in the field of digital beam radar

Method used

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  • Vehicle-mounted multi-resolution composite digital radar system
  • Vehicle-mounted multi-resolution composite digital radar system
  • Vehicle-mounted multi-resolution composite digital radar system

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Embodiment

[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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Abstract

The invention discloses a vehicle-mounted multi-resolution composite digital radar system. The system comprises an emitter, a horn antenna, a receiver, a receiving antenna, a DBF processor and a controller. According to the vehicle-mounted multi-resolution composite digital radar system, the multi-resolution composite digital array MRCA antenna is adopted, the number of radar antenna array units can be reduced, the complexity cost of the system is reduced, meanwhile, the directivity of the radar array antenna system is enhanced, and the angle resolution is improved.

Description

technical field [0001] The invention relates to a vehicle-mounted radar system, in particular to a vehicle-mounted radar system based on a multi-resolution composite digital array antenna. Background technique [0002] Digital beamforming (DBF) originated from adaptive array antennas, and its early application areas were also sonar and radar. Digital beamforming technology is based on digitized information, which is then beamformed and processed. With the development of the times, social warfare has higher and higher requirements for radar performance, and digital signal processing technology is also maturing. The advantage of DBF is that it can control the main beam and obtain a relatively high signal-to-noise ratio, which makes it very important for improving the performance of radar, so more and more people are turning their attention to digital beam radar . [0003] Traditionally, in order to improve the resolution of the radar, it is necessary to increase the number ...

Claims

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Application Information

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IPC IPC(8): G01S13/931G01S7/03
CPCG01S13/931G01S7/03
Inventor 唐玥
Owner 江苏协和电子股份有限公司
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