A design method of planar coprime array based on sum-difference synergy array construction

A design method and the technology of the cooperative array, which can be applied to the orientation device for measuring the direction, the direction finder using the electromagnetic wave, the direction finder using the radio wave, etc., can solve the problems such as the limited one-dimensional linear sparse array of the sum-difference cooperative array, Achieve the effect of reducing the impact, reducing the number of array elements, and high array freedom

Active Publication Date: 2021-07-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

In addition, the current research on sum-difference synergistic arrays is still limited to one-dimensional linear sparse arrays, and there is still a large research space for the combination of two-dimensional planar sparse arrays and sum-difference synergistic arrays.

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  • A design method of planar coprime array based on sum-difference synergy array construction
  • A design method of planar coprime array based on sum-difference synergy array construction
  • A design method of planar coprime array based on sum-difference synergy array construction

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Embodiment Construction

[0033] The technical solutions and effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] Step 1. Determine the basic parameters of the planar coprime array; select the coprime natural number pair M 1 =4, M 2 =3, where M 1 =2×2, namely

[0035] Step 2, construct two sub-arrays of the plane coprime array respectively on the xOy coordinate plane; Wherein the sub-arrays It consists of 3×3=9 array elements, and the distance between adjacent array elements is The array element position is Such as figure 2 The "○" in indicates the sub-array array element position; subarray It consists of 4×4=16 array elements, and the distance between adjacent array elements is M 2 d=3d, the array element position is Such as figure 2 The "◇" in indicates the sub-array The position of the array element; the leftmost array element of the two sub-arrays coincides with the coordinate origin O;

[0036] Step 3, the...

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Abstract

The invention discloses a method for designing a planar coprime array based on a sum-difference synergistic array, which mainly solves the problem that the degree of freedom of a planar coprime array in the prior art is limited by only using a differential synergistic array, and the research on the sum-difference synergistic array For problems limited to one-dimensional linear arrays, by compressing the element spacing of one of the sub-arrays of the planar coprime array, and resetting the relative positions of the two sub-arrays, they are arranged vertically and symmetrically and separated by a certain distance. The planar coprime array constructed by the method of the present invention can finally form a difference synergistic array and a sum synergistic array to form a sum-difference synergistic array, and the sum-difference synergistic array includes a large-area evenly spaced virtual rectangular array. Compared with the differential cooperative array of the traditional planar coprime array, the method of the invention greatly improves the degree of freedom of the array.

Description

Technical field: [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a method for constructing a planar coprime array, which can be used to generate a sum-difference synergistic array with a high degree of freedom. [0002] technical background: [0003] Direction of Arrival (DOA) estimation is an important research branch in the field of array signal processing. It uses an array antenna with a specific structure to receive airspace signals, and uses modern signal processing theory techniques and related optimization methods to achieve The DOA of the received signal is estimated, which is widely used in military and civilian fields. Traditional DOA estimation mostly uses densely arranged uniform linear arrays or uniform planar arrays, and the degree of freedom (DOFs) that can be achieved is limited by the physical antenna aperture, and there are more serious mutual coupling effects between antenna elements. With the ad...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/14G01S3/782G01S3/802
CPCG01S3/143G01S3/782G01S3/802
Inventor 任仕伟王贵愚高巍
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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