Two-dimensional arrival direction testing method based on wave beam space conversion

A technology of spatial transformation and measurement method, which is applied in directions such as direction finders using radio waves, radio wave direction/bias determination systems, etc., and can solve the problems of difficult to achieve DOA estimation, low estimation accuracy, and high data processing complexity.

Inactive Publication Date: 2017-01-04
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

However, most of the existing algorithms require one-dimensional or two-dimensional spectral search, and sometimes multi-dimensional nonlinear optimization is set, resulting in relatively high data processing complexity, and it is difficult to achieve real-time DOA estimation
For massive MIMO systems, the number of ant

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  • Two-dimensional arrival direction testing method based on wave beam space conversion
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  • Two-dimensional arrival direction testing method based on wave beam space conversion

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[0053] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0054] Use the present invention as figure 1 The two-dimensional uniform rectangular array shown, figure 1 There are M=100 array elements in total, and there are M in the x direction x = 10 rows, there are M in the y-axis direction y = 10 columns. The signal wavelength λ is 0.375m, and the distance between adjacent array elements in the x and y directions is d=λ / 2=0.1875m. In this embodiment, there are K=2 narrow-band incoherent incidents to the array in different directions, the azimuth and elevation angles of the first incident signal are 25° and 50° respectively, and the azimuth and elevation angles of the second incident signal are The angles are 62° and 45° respectively, the noise on each array element is additive white Gaussia...

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Abstract

The invention discloses a two-dimensional arrival direction testing method based on wave beam space conversion, and is applicable to a method for testing a non-coherent signal two-dimensional arrival direction of a large-scale MIMO system. The two-dimensional arrival direction testing method comprises the following steps: setting a uniform matrix array with M antennas, and performing wave beam space conversion on received data; establishing a covariance matrix of a conversion vector; acquiring a signal sub-space through the covariance matrix; acquiring a corresponding generalized selection signal sub-space according to characteristics of wave beam space conversion and an array structure; then, acquiring a rotation matrix; and finally, respectively confirming a pitch angle and an azimuth angle of a signal source. The two-dimensional arrival direction testing method has relatively small testing errors in a large-scale MINO scene, and non-linear optimization and angle search are avoided. Therefore, the two-dimensional arrival direction testing method has the advantages of being high in precision, low in data processing complexity and the like, and the performance and practical values of the system can be effectively improved when the two-dimensional arrival direction testing method is applied to the large-scale MIMO system.

Description

technical field [0001] The invention belongs to the technical field of wireless mobile communication, in particular to a method for measuring the two-dimensional angle of arrival (Direction of Arrival, referred to as DOA) of an incoherent signal by using a large-scale array antenna. Background technique [0002] With the development of mobile communication technology, especially the recent development of the fourth generation mobile communication system (4G), people have higher and higher requirements for communication speed and quality, and the demand for communication services is increasing. In the fourth-generation mobile communication system, the utilization rate of the spectrum has been greatly improved, mainly due to the multiple-input multiple-output (MIMO) antenna technology. However, with the increase of business volume, the traditional MIMO array has gradually been unable to meet the demand of increasing transmission rate. Coupled with the exploration of the fifth...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 郑植孟会鹏杨雨轩刘柯宏葛琰杨娇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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