Anti interference method of satellite navigation based on air time frequency architecture

A satellite navigation, space-time-frequency technology, applied in the fields of communication and satellite navigation applications, can solve the problem of reducing the suppression ability, and achieve the effect of improving the degree of freedom, reducing the realization cost, and improving the strength

Active Publication Date: 2017-05-31
GUANGZHOU HAIGE COMM GRP INC
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Problems solved by technology

[0004] The invention provides a satellite navigation anti-jamming method based on a space-time-frequency framework to solve the problem t

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  • Anti interference method of satellite navigation based on air time frequency architecture
  • Anti interference method of satellite navigation based on air time frequency architecture
  • Anti interference method of satellite navigation based on air time frequency architecture

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Embodiment Construction

[0040] In order to better understand the technical solution proposed by the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Such as figure 1 As shown, a satellite navigation anti-jamming method based on space-time-frequency architecture includes the following steps:

[0042] S1: Process the satellite signal received by the multi-element antenna array into a digital intermediate frequency signal;

[0043] S2: Perform frequency domain conversion on digital intermediate frequency signals of different channels to suppress narrowband interference;

[0044] S3: converting the digital intermediate frequency signal after the narrowband interference suppression processing in step S2 into a baseband signal, and then dividing the baseband satellite signal into two parts, one part is subjected to beamforming processing and blocking processing in the desired direction, and the other p...

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Abstract

The invention provides an anti interference method of satellite navigation based on air time frequency architecture, combining the characteristics of an array antenna and an adaptive signal processing technique. The signal received by the array antenna is processed as a baseband signal. The baseband signal is processed for beamforming by the blocking matrix method to form a new digital baseband signal. Then the new digital baseband signals are processed by means of interference suppression, anti-interference processing, digital conversion and digital-to-analog conversion frequency processing. The anti interference method of satellite navigation based on air time frequency architecture suppresses narrowband signals, improves free degree of anti-interference processing, beneficial to improve the whole anti-interference ability. And the anti interference method of satellite navigation based on air time frequency architecture can be implemented on hardware platform such as FPGA, and can be applied to high dynamic scenes, such as on-board, airborne, etc.

Description

technical field [0001] The invention belongs to the communication field, relates to the satellite navigation application field, and in particular to a satellite navigation anti-jamming method based on a space-time-frequency framework. Background technique [0002] When the satellite navigation signal reaches the earth, the signal power is very low, and the frequency, coding method, and modulation method of the satellite navigation signal are all public, so the satellite navigation signal is vulnerable to malicious interference. Common malicious interference mainly includes suppressive interference and deceptive interference. This method mainly suppresses suppressive interference. The so-called suppressive interference means that the jammer transmits high-power signals in the satellite navigation signal frequency band, blocking the entire satellite signal frequency band, so that the satellite navigation receiver cannot capture satellite signals, thus losing its normal positi...

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Application Information

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IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 邹瑜夏晓禹牟传坤叶韬成潘未庄王甲池常桂林
Owner GUANGZHOU HAIGE COMM GRP INC
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