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Design method of three-coordinate radar shaped pattern based on sequence quadratic programming

A technology of sequence quadratic programming and design method, applied in the field of radar, can solve problems such as clutter and interference, false alarms or cover small targets, unsatisfactory side lobe levels, etc., to achieve suppression of side lobe levels and high optimization efficiency Effect

Active Publication Date: 2020-04-28
CNGC INST NO 206 OF CHINA ARMS IND GRP
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Problems solved by technology

For low sidelobe pattern synthesis, the Dolph-Chebyshev method and Taylor synthesis method can obtain ideal sidelobe levels, but the shape of the main lobe of the pattern is relatively single
[0004] The main lobe fluctuation of the three-coordinate radar pattern will not only affect the detection power of the radar, but also affect the measurement accuracy and tracking performance of the target, and the excessively high side lobe level will generate unnecessary clutter and interference, resulting in false alarms or cover up small targets
The existing pattern design algorithm for phase optimization cannot take into account the main lobe shape control and side lobe suppression, so the designed transmission pattern usually has large fluctuations in the main lobe, or the side lobe level is not ideal

Method used

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  • Design method of three-coordinate radar shaped pattern based on sequence quadratic programming
  • Design method of three-coordinate radar shaped pattern based on sequence quadratic programming
  • Design method of three-coordinate radar shaped pattern based on sequence quadratic programming

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Embodiment Construction

[0036] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0037] refer to figure 1 , the specific implementation steps of this embodiment are as follows:

[0038] Step 1. Set the desired direction map, and set the upper and lower limits of the direction map fluctuation.

[0039] Assuming that the radar system is a uniform linear array composed of M array elements, the phase weight is defined as

[0040]

[0041] where φ m Indicates the phase that needs to be adjusted to transmit the signal to the mth array element, ( ) T means transpose, then the phase weight The pattern at the far field θ direction is expressed as:

[0042]

[0043] where a(θ)=[1,e j2πdsinθ / λ ,...,e j2πd(M-1)sinθ / λ ] T Indicates the steering vector, θ indicates the pitch angle, d indicates the array element spacing, λ indicates the signal wavelength, ( ) H Represents the conjugate transpose, (·) * Represents the conjugate, sin(·) repre...

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Abstract

The invention relates to a three-dimensional radar shaped directional diagram designing method based on sequential quadratic programming. The problems that in an existing shaped directional diagram designing method, main lobe fluctuation and side lobe suppression are not taken into consider at the same time, and the design time is long are mainly solved. The method comprises the steps that firstly, a desired directional diagram is set, and the upper fluctuation limit and the lower upper fluctuation limit of the directional diagram are set; secondly, the weight of a main lobe and the weight of the side lobe are set; thirdly, multiple groups of random phase weights are generated, and the initial phase weight is optimized by using an alternating projection algorithm; fourthly, multiple groups of optimized phase weights are obtained through sequential quadratic programming; fifthly, the optimal weight is selected in the optimized phase weights. By means of the three-dimensional radar shaped directional diagram designing method, the main lobe fluctuation level can be controlled at a certain degree, meanwhile, the side lobe level can be suppressed, the optimization efficiency is high, and the method has engineering practicability.

Description

technical field [0001] The invention belongs to the technical field of radar and relates to the design of a shape-forming pattern, which can be used for the shape-forming design of emission in different working modes of a three-coordinate radar and satisfies engineering requirements. Background technique [0002] Array antennas can achieve high-gain narrow beams or specific shaped beams by adjusting the amplitude and phase, and the beam scanning method is flexible, so it is widely used in radar, communication and other fields. In the field of radar, the transmission pattern is directly related to the strength of the target signal, the suppression of clutter and interference, and also determines the power of the radar, thus affecting the detection performance and resource utilization of the radar system. In addition, in different scenarios, beams of different shapes are usually required. For example, the search mode of the air condition three-coordinate radar usually requires...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/06
CPCG06F30/20G06F2111/06
Inventor 王旭蔡兴雨朱思桥任伦高恒
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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