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Planar co-prime array design method based on sum-difference cooperative array construction

A design method and technology of synergistic arrays, which are applied to direction finder, direction finder using electromagnetic waves, direction finder using radio waves, etc., can solve the problems of one-dimensional linear sparse array limited by synergetic array with difference, etc. achieve the effect of reducing the impact

Active Publication Date: 2020-01-31
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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  • Planar co-prime array design method based on sum-difference cooperative array construction
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  • Planar co-prime array design method based on sum-difference cooperative 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 planar coprime array respectively on the xCy 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, t...

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Abstract

The invention discloses a planar co-prime array design method based on sum-difference cooperative array construction, thereby solving problems that the degree of freedom of a planar co-prime array islimited by only using a differential cooperative array and the research of a sum-difference cooperative array is limited to a one-dimensional linear array in the prior art. The array element spacing of one sub-array of a planar co-prime array is compressed and relative positions of the two sub-arrays are reset, so that the two sub-arrays are longitudinally arranged and are bilaterally symmetricaland are spaced by a certain distance. For the planar co-prime array constructed by the method provided by the invention, the finally formed differential cooperative array and sum cooperative array canbe spliced into a sum-difference cooperative array; and the sum-difference cooperative array includes a large-area virtual rectangular area array with uniform spacing. Compared with the traditional differential cooperative array of a planar co-prime array, the disclosed method enables the degree of freedom of the array to be improved substantially.

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 utilizes densely arranged uniform linear arrays or uniform planar arrays, and the degrees of freedom (DOFs) that can be achieved are limited by the physical antenna aperture, and there are more serious mutual coupling effects between antenna elements. With ...

Claims

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Application Information

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Patent Type & Authority Applications(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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