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Planar array DOA estimation method and equipment thereof

A planar array and DOA technology, applied in the field of planar array DOA estimation, can solve problems such as difficulty in applying real-time performance, inability to meet two-dimensional DOA estimation, and poor estimation performance.

Active Publication Date: 2018-06-05
SHANDONG AGRICULTURAL UNIVERSITY
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Problems solved by technology

However, most of the current research focuses on one-dimensional linear arrays, which cannot meet the needs of two-dimensional DOA estimation.
[0003] In addition, in the traditional two-dimensional DOA estimation research, the estimation performance is limited by the array aperture, and it is very difficult to arrange a large-aperture array antenna when the size is limited, resulting in poor estimation performance
At the same time, the complete search of the two-dimensional spatial spectrum and the pairing of two-dimensional angles will lead to high computational complexity, so it is difficult to apply to occasions with high real-time requirements

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  • Planar array DOA estimation method and equipment thereof

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[0059] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0060] figure 1 A schematic flowchart of a planar array DOA estimation method 100 according to an embodiment of the present invention is shown.

[0061] Such as figure 1 As shown, the planar array DOA estimation method 100 includes the following steps:

[0062] Step S102: Use a planar array to receive a signal from at least one signal source, the planar array includes at least one parallel coprime array, and the parallel coprime ...

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Abstract

The invention discloses a planar array DOA estimation method and equipment thereof. The planar array DOA estimation method comprises the following steps of 1, receiving a signal from at least one signal source by means of a planar array, wherein the planar array comprises at least one parallel coprime array, and the parallel coprime array comprises coprime linear subarray pairs which are parallelwith each other; 2, based on an actually received signal of the coprime linear subarray pairs, calculating an autocovariance matrix of actually received signals of two linear subarrys of the coprime linear subarray pairs, and a cross-covariance matrix between the actually received signals of the two linear subarrys; and 3, estimating the DOA value of at least one signal source based on the autocovariance matrix and the cross-covariance matrix. The planar array DOA estimation method and the equipment thereof settle a problem of high algorithm complexity caused by factors such as two-dimensionalspatial spectrum searching and angle pairing and can realize high-precision wave arrival direction estimation with relatively low complexity. The method and the equipment are suitable for the occasion with high real-time performance requirement.

Description

technical field [0001] The invention relates to the field of communication signal processing, in particular to a planar array DOA estimation method and equipment. Background technique [0002] Direction of Arrival (DOA) estimation is an important research content in many fields such as radar, sonar and wireless communication. Using multiple antennas to form an array can be used to estimate the direction of arrival of the signal. However, traditional antenna arrays are usually restricted by the fact that the distance between adjacent elements is not greater than half a wavelength, which results in a limited array aperture when the number of antennas is constant. At present, an antenna array structure called a coprime array breaks through the half-wavelength limitation and has received widespread attention, which can effectively improve the angle estimation performance. However, most of the current research focuses on one-dimensional linear arrays, which cannot meet the need...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 兰鹏孙丰刚孙波
Owner SHANDONG AGRICULTURAL UNIVERSITY
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