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Single-pulse multi-target super-resolution angle measurement implementation method based on sparse array radar

A sparse array and single-pulse technology, which is applied in the field of single-pulse multi-target super-resolution angle measurement based on sparse array radar, can solve the problems of inability to accurately measure multiple targets, and inability to achieve multiple target resolution.

Active Publication Date: 2021-06-01
BEIJING JIAOTONG UNIV
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  • Claims
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Problems solved by technology

The above target detection and angle measurement methods have certain shortcomings in dense multi-target detection
The constant false alarm detection technology based on the one-dimensional range image cannot realize the resolution of multiple targets with similar distances in the beam; the array-based beam scanning method cannot accurately measure multiple targets with similar angles, when the distance between multiple targets is less than When the interval between a distance unit and the angular interval is less than the half-power beam width, none of the above methods can correctly distinguish and accurately measure multiple targets in space.

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  • Single-pulse multi-target super-resolution angle measurement implementation method based on sparse array radar
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  • Single-pulse multi-target super-resolution angle measurement implementation method based on sparse array radar

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Embodiment 1

[0067]Figure 4 In order to verify the graph of the thinbed array radar of the algorithm of the embodiment of the present invention. Among them, the width of the width of the width radar is 9.2GHz, the transmitted signal bandwidth is 3MHz, the beam width is 0.45 °, and the 3 target distance radar in the beam is: [10, 10, 15] km, the target azimuth angle is: [1.0 1.3, 0.9] °. As can be seen from the figure, the first, 2 targets are different from the same distance, and the one-dimensional distance image cannot be distinguished, and the third target can be distinguished from the first two targets from one-dimensional distance.

[0068]Figure 5 In order to measure the data schematic of the Dictionary matrix for the array of all-array radar system parameters, the number of all-in-Rottal array is 128, the dictionary matrix angle range is [-5, 5] °, and the angle division interval is 0.1 °.

[0069]Figure 6 In order to use the angle observation matrix constructed by the array of thinbed radar sy...

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Abstract

The invention provides a single-pulse multi-target super-resolution angle measurement implementation method based on a sparse array radar. The method comprises the steps of: performing one-dimensional range profile constant false alarm detection on target echo signals of multiple channels of a monopulse sparse array radar to obtain array signals of distance units where each target is located, and constructing angle observation vectors of the targets according to the array signals of the distance units where the targets are located; constructing an angle measurement dictionary matrix by using the working parameters of a sparse array radar system, and constructing an angle observation matrix according to the angle measurement dictionary matrix and the working parameters of the sparse array radar; and based on the angle observation vector and the angle observation matrix of the target, performing reconstruction imaging on the phase delay vectors of different targets by using an optimization algorithm to realize multi-target super-resolution and angle measurement of the target echo signals. According to the method, angle resolution and accurate measurement can be carried out on the plurality of targets with similar distances and angles in beams from radar monopulse echo data.

Description

Technical field[0001]The present invention relates to the field of radar signal processing, and more particularly to a single pulse multi-target super-distinguishing angle of a thin pulse array radar.Background technique[0002]Array radar has a wide range of applications in the field of target detection. In radar detection techniques, due to the distance resolution restriction of the target, the angle resolution is constrained by the radar beam width, and therefore, the high resolution technology of intensive multi-objective is a difficult point in the field of radar detection.[0003]Currently, the objective detection and angular angle method based on array radar in the prior art mainly has a constant deficiency alarm detection technology based on one-dimensional distance, and an array-based beam scanning method. The above objective detection and anglerance method has a certain disadvantage in intensive multi-objective detection. A plurality of target distinguishing techniques based o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/44
CPCG01S13/44Y02T10/40
Inventor 王明江闻映红张金宝
Owner BEIJING JIAOTONG UNIV
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