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Multiclass satellite navigation interference suppression method based on solution expanding technology

A satellite navigation and interference suppression technology, applied in the field of multi-type satellite navigation interference suppression based on de-respreading technology, can solve problems such as failure to work normally, and achieve the effects of high gain and insensitivity to power size

Inactive Publication Date: 2015-02-04
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

It is worth noting that none of these methods work well in the coexistence of suppressive jamming and deceptive jamming

Method used

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  • Multiclass satellite navigation interference suppression method based on solution expanding technology
  • Multiclass satellite navigation interference suppression method based on solution expanding technology
  • Multiclass satellite navigation interference suppression method based on solution expanding technology

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Embodiment Construction

[0024] The multi-type satellite navigation interference suppression method based on the de-respreading technology of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. For convenience, the following uses the GPS (Global Positioning System) system and an array antenna of N array elements as an example to illustrate. In fact, this method is applicable to any array antenna and does not need to know the array antenna manifold.

[0025] Such as Figure 7 As shown, the multi-class satellite navigation interference suppression method based on the de-respreading technology provided by the present invention includes the following steps carried out in order:

[0026] (1) Convert the radio frequency signal received by the array antenna into a digital intermediate frequency signal:

[0027] Spoofing jamming consists of multiple satellite signals (called pseudolites) beaming in the same direction. Among them, the ...

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Abstract

The invention discloses a multiclass satellite navigation interference suppression method based on solution expanding technology. The method comprises the steps as follows: projecting the signal received by the array antenna to the interference orthogonal complement space for restraining the blanket jamming, calculating the solution expanding weight vector matrix for the projected data, judging whether the matrix is full rank for identifying the deception jamming. If having deception jamming, calculating the solution expanding weight vector dependency, identifying the number of deception interference source, the deception interference source comprises fake satellite signal and true satellite signal. Using the solution expanding weight vector of the deception jamming for forming the rectangular projection matrix of the deception jamming, having the projection restraining deception jamming on signal, using the weight vector of true satellite for forming multi-wave beam and obtaining the signal processing gain. The method can generate high gain multi-wave beam with suppress interference, transmitted deception jamming and generated type deception jamming resisting capability, the multi-wave beam forming capability is not limited by the array element, and there is no need to know the satellite signal and interference information.

Description

technical field [0001] The invention relates to the field of satellite navigation anti-interference, in particular to a multi-type satellite navigation interference suppression method based on de-respreading technology. Background technique [0002] The global satellite navigation system (GNSS) uses artificial satellites to transmit navigation signals, so that it can provide high-precision position and time information for receivers within the coverage range at any time and any place, so the satellite navigation system is extremely important. Since GNSS satellite signals are extremely weak, how to ensure the safety and reliability of GNSS application facilities is particularly important, and the problem of anti-jamming has become the primary problem facing the global satellite navigation system. At present, the research on satellite navigation interference suppression mainly focuses on the suppression of suppressive interference. Among them, the power inversion method utili...

Claims

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Application Information

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IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 吴仁彪王璐张耀天王文益卢丹
Owner CIVIL AVIATION UNIV OF CHINA
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