Delay fast beat-based uniform linear array high-resolution direction-of-arrival estimation method

A direction of arrival estimation and high-resolution technology, which is applied to radio wave measurement systems, direction-determining directional devices, measurement devices, etc., can solve the problems of performance deterioration of estimation methods, etc. High resolution effect

Active Publication Date: 2019-03-15
JIANGXI NORMAL UNIVERSITY
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Problems solved by technology

[0004] In order to effectively solve the problem that the performance of existing DOA estimation methods significantly deteriorates for adjacent sources, the present invention provides a high-resolution DOA estimation method based on delay snapshots

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  • Delay fast beat-based uniform linear array high-resolution direction-of-arrival estimation method
  • Delay fast beat-based uniform linear array high-resolution direction-of-arrival estimation method
  • Delay fast beat-based uniform linear array high-resolution direction-of-arrival estimation method

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Embodiment Construction

[0060] The present invention will be described in detail below in conjunction with the accompanying drawings. A high-resolution DOA estimation method based on delay snapshots for uniform line arrays. First, the received signals of all array elements are sampled, and the obtained array snapshot signals are stored in the memory; secondly, the memory is selected in a certain order. array snapshot signal, construct the delay snapshot, and obtain the data matrix from the delay snapshot; then, calculate the signal covariance matrix from the data matrix, perform eigendecomposition on the signal covariance matrix to obtain the eigenvalues ​​and eigenvectors, and compare The eigenvectors corresponding to the small eigenvalues ​​constitute the noise subspace; then, the spatial power spectrum is calculated according to the noise subspace and the array steering vector, and the spectral peak of the spatial power spectrum is searched to determine the mapped direction of arrival; finally, acc...

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Abstract

The invention discloses a delay fast beat-based uniform linear array high-resolution direction-of-arrival estimation method, which comprises the following steps: acquiring and storing an array fast beat, constructing a delay fast beat, calculating a signal covariance matrix, performing characteristic decomposition on the signal covariance matrix, constructing a noise subspace, calculating a spatial power spectrum, searching spectral peaks, determining a mapping direction-of-arrival, and calculating an estimated direction-of-arrival of a signal. Under the condition of the same signal-to-noise ratio and the same fast beat number, compared with the existing direction-of-arrival estimation method, the delay fast beat-based uniform linear array high-resolution direction-of-arrival estimation method has higher space resolution and can obtain higher direction-of-arrival estimation precision. Meanwhile, the calculation complexity is equivalent to that of the multi-signal classification method,so that the method is convenient to implement.

Description

technical field [0001] The invention relates to the field of array signal processing, in particular to a high-resolution direction-of-arrival estimation method for uniform line arrays based on delayed snapshots. Background technique [0002] Array signal processing is widely used in mobile communications, radar, sonar, navigation, seismic detection, and medical imaging. Direction of arrival estimation is one of the key technologies in array signal processing. Specifically, direction of arrival estimation refers to the process of analyzing and processing the signals received by the array sensor to estimate the direction of arrival of the signals. [0003] The existing DOA estimation methods are mainly divided into two categories: one is the conventional DOA estimation method represented by beamforming; the other is the high-resolution DOA estimation method represented by Multiple Signal Classification (MUSIC). Estimation method. Among them, the advantage of the beamforming...

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Application Information

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IPC IPC(8): G01S3/00
CPCG01S3/00
Inventor 陈勇王芳
Owner JIANGXI NORMAL UNIVERSITY
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