Two-dimensional DOA estimation method based on parallel nested array

A technology of nested arrays and estimated values, which is applied to direction finders using radio waves, radio wave direction/bias determination systems, etc., and can solve problems such as huge computational load, high computational complexity, and low degrees of freedom.

Active Publication Date: 2019-03-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] At present, the two-dimensional DOA estimation based on dual parallel linear arrays has the following disadvantages: the number of estimated signals cannot exceed the number of sub-arrays, and the degree of...

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  • Two-dimensional DOA estimation method based on parallel nested array
  • Two-dimensional DOA estimation method based on parallel nested array
  • Two-dimensional DOA estimation method based on parallel nested array

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Embodiment Construction

[0056] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0057] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in ...

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Abstract

The invention provides a two-dimensional DOA estimation method based on a parallel nested array. The method comprises the steps of calculating autocorrelation matrix of a first subarray virtual optimized array receiving signal and autocorrelation matrix of a second subarray virtual optimized array receiving signal; calculating cross-correlation matrix of the first subarray virtual optimized arrayreceiving signal and the second subarray virtual optimized array receiving signal and cross-correlation matrix of a second subarray virtual optimized array and a first subarray virtual optimized array; calculating the autocorrelation matrix of the parallel nested array virtual optimized array receiving signal; calculating an estimated value of an incident signal cos alpha; calculating an estimatedvalue of cos beta; calculating an estimated value of an azimuth angle of the Kth signal and the estimated value of a pitch angle. The method uses all of the virtual array elements of a sparse array for estimation, and breaks the limit that the number of estimable signals cannot exceed the number of subarrays.

Description

technical field [0001] The invention belongs to the technical field of wireless communication and radar signal processing, in particular to a two-dimensional DOA estimation method based on parallel nested arrays. Background technique [0002] With the development of space-division multiple access technology and smart antenna technology, using the direction of arrival (DOA) of the signal to complete the airspace capture and tracking of the signal has attracted a large number of domestic and foreign scholars' research, especially in radar, sonar, navigation, communication, radio astronomy and many other fields. [0003] Most of the existing DOA estimation methods are based on the traditional full array, that is, the distance between adjacent elements of the antenna array should not exceed half the wavelength of the incident signal. However, due to the limitation of the array element spacing, the number of array elements must be increased in order to increase the array apertur...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 牟仕林郑植杨潇杨朝麟黄逸潇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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