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Anti-interference method and device

A technology of anti-interference device and interference threshold, which is applied to measuring devices, satellite radio beacon positioning systems, instruments, etc., and can solve problems such as limitations of filtering methods

Active Publication Date: 2017-01-25
BEIJING BDSTAR NAVIGATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an anti-interference method and device, which solves the problem of the limitation of a single filtering method

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Embodiment Construction

[0056] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0057] First, Embodiment 1 of the present invention will be described.

[0058] Such as figure 1 As shown, an anti-jamming method for a navigation receiver space-frequency domain combination provided by an embodiment of the present invention includes:

[0059] 1. First, accumulate intermediate frequency AD sampling signals of a certain length K. The intermediate frequency AD sampling signal data includes satellite signals, narrowband, broadband interference and background noise, and perform FFT transformation on them;

[0060] 2. After the intermediate frequency AD sampling signal is transformed by FFT, the amplitude spectrum ξ is obtained n , the average value of the amplitu...

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Abstract

The invention provides an anti-interference method and device, relating to the field of anti-interference filtering, and aiming at solving the problem of limit of a single filtering mode. The anti-interference method comprises the following steps: performing frequency domain narrow-band interference preprocessing on an intermediate frequency signal, thereby obtaining a frequency domain array; performing spatial filtering on the frequency domain array according to multiple frequency points; and performing multi-point IFFT conversion on the frequency domain array subjected to spatial filtering, thereby obtaining time domain intermediate frequency data subjected to anti-interference processing. The technical scheme provided by the invention is applicable to satellite signal processing, and resistance to hybrid interference caused by wide bands and narrow bands is achieved.

Description

technical field [0001] The invention relates to the field of anti-interference filtering, in particular to an anti-interference method and device applied to satellite navigation receivers and other anti-interference spread spectrum communication systems under various incoming interference environments. Background technique [0002] Global satellite navigation systems currently include the US Global Positioning System (GPS), the Russian Global Satellite Navigation System (GLONASS), the European Galileo Satellite Positioning System (Galileo), and the developing Chinese Beidou Positioning System, which can provide all-weather, real-time, continuous High-precision position information has been widely used in the positioning, navigation, timing and precision measurement of various military and civilian targets. But satellite signals are subject to intentional and unintentional interference during transmission and reception. The adaptive array antenna changes the shape of the pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 不公告发明人
Owner BEIJING BDSTAR NAVIGATION CO LTD