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Direction-of-arrival estimation method on basis of uniform circular array

A direction-of-arrival estimation and uniform circular array technology, applied to radio wave direction/deviation determination systems, direction finders using radio waves, radio wave director components, etc., can solve the problem of estimation performance degradation, estimation performance deterioration, etc. problem, to achieve the effect of improving the estimation performance, improving the estimation performance, and making up for the loss of the array aperture

Inactive Publication Date: 2012-07-25
HARBIN ENG UNIV
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Problems solved by technology

However, the array after virtual transformation often has different degrees of array aperture loss, which reduces the estimation performance; and the noise may be nonlinearly amplified after virtual transformation, which will further deteriorate the estimation performance, especially in the signal When the noise ratio is small

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  • Direction-of-arrival estimation method on basis of uniform circular array
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  • Direction-of-arrival estimation method on basis of uniform circular array

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Embodiment Construction

[0023] The core idea of ​​the present invention is to use the characteristics of the data structure in the process of mode space transformation to eliminate the influence of uniform Gaussian white noise on DOA estimation and improve the estimation performance; The effect of the noise after the UCA array is increased after the mode space transformation of the effective array aperture.

[0024] The UCA array has great advantages because it can provide unambiguous azimuth information and two-dimensional angle information. However, due to the particularity of the position of its array elements, many traditional direction-finding algorithms based on ULA arrays are not suitable for UCA arrays, especially in the presence of coherent signals. With the introduction of the mode space transformation method, the UCA array can be virtually converted into a ULA array, but there is an array aperture loss after conversion, and the noise power will be amplified in the mode space, which will af...

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Abstract

The invention relates to a direction-of-arrival estimation method on the basis of a uniform circular array, in particular to a direction-of-arrival estimation method for independent signals and coherent signals on the basis of the uniform circular array. The direction-of-arrival estimation method on the basis of the uniform circular array includes: preprocessing estimation parameters of direction-of-arrival; removing noise of pattern space; increasing aperture of the array and performing direction-of-arrival estimation to independent signals; and eliminating independent signals and performing direction-of-arrival estimation to coherent signals. The direction-of-arrival estimation method has higher estimation precision, the aperture of the array can be utilized more sufficiently, the loss of the aperture of the array due to array transformation of a virtual array is recovered, estimation performance can be improved further, calculation is simple and calculation quantity is low.

Description

technical field [0001] The present invention relates to a direction of arrival (Direction of Arrival, referred to as DOA) estimation method, in particular to a direction of arrival estimation method based on independent signals and coherent signals of a uniform circular array (Uniform Circular Array, referred to as UCA). Background technique [0002] In the actual signal environment, independent signals and coherent signals often exist at the same time. Most DOA estimation algorithms are mainly designed for independent signals or coherent signals. The characteristics of the signal and the coherent signal are used to estimate the DOA. In the literature: Ye Z F, Zhang Y F, Liu C.Direction-of-arrival estimation for uncorrelated and coherent signals with fewer sensors[J].IEEE Trans.on Microwaves, Antennas&Propagation, 2009, 3(3):473-482, The DOA estimation of independent signals and coherent signals is considered, but it is only applicable to the DOA estimation of Uniform Linea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14G01S3/12
Inventor 刁鸣安春莲
Owner HARBIN ENG UNIV
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