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Improved MUSIC algorithm-based ADS-B signal direction of arrival estimation method

A direction of arrival estimation and direction estimation technology, which is applied to the radio wave direction/bias determination system, the directional device for determining the direction, and the direction finder using radio waves. It can solve the problem of low resolution and poor performance of the MUSIC algorithm. question

Inactive Publication Date: 2017-07-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an ADS-B signal direction-of-arrival estimation method of an improved MUSIC algorithm, which is used to solve the low resolution and poor performance of the MUSIC algorithm in the prior art technical issues

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  • Improved MUSIC algorithm-based ADS-B signal direction of arrival estimation method

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Embodiment Construction

[0086] The present invention will be further described below in conjunction with the accompanying drawings.

[0087] Combine below Figure 1 to Figure 7 Show this implementation mode, this implementation mode comprises the following steps:

[0088] Step 1. According to the parameters listed in Table 1, simulate the far-field narrowband signal parameters and the array antenna.

[0089] Table 1

[0090]

[0091] On this basis, the ADS-B signal acquisition model of the linear array is established, the array flow pattern of the linear array is determined, the signal matrix and the noise matrix are set up, and the ADS-B signal acquisition model of the linear array can be obtained, as shown in figure 2 shown. figure 2 It is a schematic diagram of a linear ADS-B signal receiving array.

[0092] Step 2. Estimating the spatial spectrum function of the ADS-B signal: using the orthogonality of the signal subspace and the noise subspace, the covariance matrix of the array signal ...

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Abstract

The invention discloses an improved MUSIC algorithm-based ADS-B signal direction of arrival estimation method. The method comprises the following steps that: (1) the ADS-B signal acquisition model of a linear array is established; (2) the spatial spectral function of ADS-B signals is estimated; and (3) the spatial spectral function of the ADS-B signals is processed based on a second-order derivative solving method, and spectral peak search is performed for a second-order derivative spatial spectral function. The improved MUSIC algorithm-based ADS-B signal direction of arrival estimation method of the invention is used for civil aviation aircraft ADS-B signal man-made disturbance suppression and operation safety guarantee.

Description

technical field [0001] The invention belongs to the field of civil aircraft ADS-B monitoring and operation safety assurance, and in particular relates to an ADS-B signal direction-of-arrival estimation method and a feasibility verification method based on an improved MUSIC algorithm. Background technique [0002] In order to cope with the contradiction between the increasing aviation demand and the relative backwardness of air traffic control, the International Civil Aviation Organization proposes ADS-B, an Automatic Dependent Surveillance-Broadcast technology under the new navigation system. ADS-B is an aircraft operation monitoring technology based on global satellite positioning system and air-air, ground-air data link communication. Compared with traditional radar surveillance systems, ADS-B can obtain higher-precision target position and height information, breaking through the problem that it cannot cover areas such as deserts and oceans, and the data accuracy is limit...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/143
Inventor 沈志远周思遥卢朝阳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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