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Method for inhibiting pulse interference of satellite navigation system

A technology of satellite navigation system and pulse interference, which is applied in the field of satellite navigation, can solve problems affecting the integrity and availability of satellite signal data, data distortion, etc., and achieve the effects of suppressing interference, ensuring availability, and enhancing flight safety factor

Inactive Publication Date: 2013-04-17
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

Although this method can retain more signal energy than the time-domain pulse blanking method, this method will also filter out a part of the useful signal, which will also cause data distortion, thereby affecting the integrity and availability of satellite signal data

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  • Method for inhibiting pulse interference of satellite navigation system
  • Method for inhibiting pulse interference of satellite navigation system
  • Method for inhibiting pulse interference of satellite navigation system

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Embodiment Construction

[0019] The pulse interference suppression method for a satellite navigation system provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Such as figure 1 , figure 2 As shown, the pulse interference suppression method for satellite navigation system provided by the invention comprises the following steps carried out in order:

[0021] (1) Use the time-frequency domain hybrid filter method to preliminarily suppress the signal pulse interference, and use the data after the interference suppression as the initial value of the distorted part of the data to replace the distorted data, and obtain the preliminary corrected satellite signal data.

[0022] Considering the satellite signal including interference and noise, its model can be expressed as:

[0023] y(t)=s(t)+J(t)+e(t) (1)

[0024] Among them, s(t) is the undisturbed satellite signal, J(t) is the pulse interference signal, and e(...

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Abstract

The invention discloses a method for inhibiting pulse interference of a satellite navigation system. The method comprises the following steps: primarily inhibiting the interference by a time-domain and frequency-domain mixed filtering method to obtain an initial estimate value of a position signal of the pulse interference; replacing distorted data with the initial estimate value; and estimating a wave shape parameter of a satellite signal and the distorted data by using all data which is subjected to interference inhibition so as to obtain accurate estimate values of the parameter of the satellite signal and the distorted data. In the method, properties of an interference source of civil airborne navigation equipment and actual application problems are taken full account, the interference is inhibited by a signal processing method, the distorted data in the satellite signal is restored, and the availability of the satellite signal is ensured on the premise that the interference is inhibited, so that the flying safety coefficient can be increased and the system has a positive meaning for implementation of a future GNSS (global navigation satellite system)-based civil aviation navigation system.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation, and in particular relates to a pulse interference suppression method for a satellite navigation system which can enhance data availability of a navigation satellite receiver. Background technique [0002] The main navigation facility for civil aviation in the future is the Global Navigation Satellite System (GNSS, Global Navigation Satellite System), in which the GPS system is an important part of the GNSS system. The GPS system is constantly being modernized and an important part of it is the setup of the L5 signal. The L5 signal is specially set up for civil navigation and occupies a dedicated frequency band. Compared with L1 and L2 signals, the L5 signal has higher receiving energy, higher positioning accuracy, stronger anti-interference ability, and is easier to implement. Together with my country's Beidou satellite navigation system, it will constitute an important part of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
Inventor 吴仁彪方伟王文益卢丹
Owner CIVIL AVIATION UNIV OF CHINA
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