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Self-coherent MUSIC algorithm-based global positioning system interference suppressing method

A global positioning system and interference suppression technology, which is applied in the field of global positioning system interference suppression, can solve problems such as attenuation of satellite signals, failure to capture satellite signals, and inability to align direction maps, etc., to achieve high estimation accuracy and high resolution Effect

Inactive Publication Date: 2010-07-14
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

from Figure 4 It can be seen that since the pattern formed by this method cannot be aligned with each satellite sig

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  • Self-coherent MUSIC algorithm-based global positioning system interference suppressing method
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  • Self-coherent MUSIC algorithm-based global positioning system interference suppressing method

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Embodiment Construction

[0026] The method for suppressing global positioning system interference based on the self-coherent MUSIC algorithm of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings (taking an equidistant linear array as an example).

[0027] Such as figure 1 As shown, the GPS interference suppression method based on the self-coherent MUSIC algorithm of the present invention is realized by combining subspace projection and conventional beamforming technology. The combination of subspace projection and conventional beamforming technology is a two-level anti-jamming method. Firstly, the interference orthogonal complementary space projection matrix is ​​used to suppress interference, and secondly, the conventional beamforming technology is used to enhance satellite signals. Said enhancement of the satellite signal by using the conventional beamforming technology is to use the self-coherent MUSIC algorithm to estimate the dir...

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Abstract

The invention relates to a self-coherent MUSIC algorithm-based global positioning system interference suppressing method, which is implemented by combining subspace projection and routine beam forming technology. The method comprises the following steps: projecting signals received by an array antenna to an interference orthogonal complement space; for the projected data, estimating the satellite signal coming direction by utilizing a self-coherent MUSIC algorithm; and performing beam forming on the projected data by utilizing the estimated satellite signal direction. By combining the subspace projection and the routine beam forming technology, the method is a secondary anti-interference method; firstly, the interference is suppressed by utilizing a projection matrix of the interference orthogonal complement space; and secondly, satellite signals are strengthened by utilizing the routine beam forming technology. In the process of strengthening the satellite signals by utilizing the routine beam forming technology, for the projected data, the satellite signal coming direction is estimated by utilizing the self-coherent MUSIC algorithm, and the routine beam forming is performed by utilizing the estimated satellite signal direction. Through the method, interference suppression is realized, the satellite signals are ensured to be not attenuated, an inertial navigation auxiliary unit is not needed, and the method has high estimation accuracy and high resolution ratio.

Description

technical field [0001] The invention relates to a global positioning system interference suppression method. In particular, it relates to a high-resolution self-coherent MUSIC algorithm-based global positioning system interference suppression method. Background technique [0002] Global Positioning System (GPS for short) has been widely used in navigation, guidance, precision measurement and other aspects. However, because the received GPS signal is very weak, about 20dB lower than the receiver noise, it is easily affected by various intentional and unintentional interference signals. The existence of interference will cause the GPS receiver to lose lock, so that it cannot be located. Therefore, it is of great significance to study GPS anti-jamming technology. [0003] At present, interference suppression technology based on adaptive antenna array is an effective GPS anti-jamming method. In GPS anti-jamming, common adaptive antenna array technologies include: power invers...

Claims

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Application Information

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IPC IPC(8): G01S19/21
Inventor 卢丹吴仁彪胡铁乔王磊刘海涛王文益李杰
Owner CIVIL AVIATION UNIV OF CHINA
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