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Method for measuring incoherently distributed signal two-dimensional DOA (direction of arrival)

A measurement method and non-coherent technology, applied in direction finders using radio waves, radio wave direction/deviation determination systems, etc., can solve problems such as high complexity, difficulty in practical application, and inability to apply two-dimensional real-time performance. The effect of improving efficiency and accuracy, reducing processing volume and processing complexity

Inactive Publication Date: 2011-09-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

In order to overcome the defects of background technology or processing method that are too complex, or cannot be applied to two-dimensional and real-time performance, and are difficult to be practically applied, etc.

Method used

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  • Method for measuring incoherently distributed signal two-dimensional DOA (direction of arrival)
  • Method for measuring incoherently distributed signal two-dimensional DOA (direction of arrival)
  • Method for measuring incoherently distributed signal two-dimensional DOA (direction of arrival)

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Embodiment Construction

[0042] The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings.

[0043] Step 1. Set up the Stereo Antenna Array:

[0044] set a like figure 1 The three-dimensional antenna array shown, it consists of two circular arrays L 1 and L 2 Each circular array is equipped with K=10 array elements, the signal wavelength λ is 0.375m, and the radius of each circular array is r=λ / (4sin(π / 10))=0.3034m; the circular array L 1 Set in the x-y plane, the circular array L 2 Parallel to the circular array L 1 Setting; the distance between the two circular arrays is d=0.1λ=0.0375m. In this embodiment, q=2 narrowband non-coherent distribution signals are incident on the array in different directions, and the noise on each array element is additive white Gaussian noise, and the noise is not correlated with the signal;

[0045] At time t, the circular array L 1 and L 2 The received data is:

[0046] x ...

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Abstract

The invention belongs to the technical field of wireless mobile communication, and discloses a method for measuring an incoherently distributed signal two-dimensional DOA (direction of arrival) by using an array antenna. The method comprises the following steps of: arranging a three-dimensional antenna array consisting of two uniform circular arrays, establishing covariance matrixes of two circular array data, determining a sub-matrix and a central pitch angle initial value, establishing the covariance matrix of any circular array, establishing a pseudo noise sub-matrix, determining a two-dimensional spectrum function, and finally respectively determining a central directional angle and determining a central pitch angle. The root mean square error of the central directional angle and the central pitch angle measured by the measuring method is only about one tenth of angle spread; and the multi-dimensional spectrum search and the nonlinear optimization can be avoided; therefore, the measuring method is simple, reliable, can greatly reduce the computing capacity and processing complexity, has high measurement efficiency and precision, can be applied to an intelligent antenna system for improving the performance and the actual application value of the intelligent antenna system in a multi-path environment.

Description

technical field [0001] The invention belongs to the technical field of wireless mobile communication, in particular to a two-dimensional angle of arrival (Direction of Arrival, referred to as DOA) of a two-dimensional direction of arrival of an incoherent multipath distributed signal (abbreviated as an incoherent distributed signal) using an array antenna. ) measurement method. Background technique [0002] With the rapid development of the mobile communication industry in recent years, the demand for communication services is increasing, especially the concept of three-generation mobile communication, which puts forward higher requirements for communication technology. In the modern complex mobile communication environment and the limitation of frequency band resources, it is mainly limited by several factors to achieve the goals of extremely large communication capacity and excellent communication quality: due to the complexity of the mobile environment, usually from the t...

Claims

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Application Information

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IPC IPC(8): G01S3/14
Inventor 郑植滕云龙
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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