Anti-broadband-interference Beidou vehicle-mounted all-in-one machine

A broadband interference and all-in-one technology, applied in the field of satellite communication, can solve the problems of weak Beidou signal, large deviation of RNSS positioning accuracy, and inability to identify correct Beidou information, etc.

Pending Publication Date: 2019-11-29
江苏无线电厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very weak characteristics of the Beidou signal, it is vulnerable to interference from external narrowband signals, broadband signals, or deliberate interference from the enemy, resulting in the failure of the Beidou receiver; it may be deceived and interfered in the case of interference , resulting in the inability ...

Method used

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  • Anti-broadband-interference Beidou vehicle-mounted all-in-one machine
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  • Anti-broadband-interference Beidou vehicle-mounted all-in-one machine

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Embodiment 1

[0091] The present invention provides an anti-interference Beidou vehicle-mounted all-in-one machine, which adopts an integrated structure design and consists of a host and cables. The host is shown in the figure figure 1 , the host includes anti-jamming antenna element, receiving channel module, power amplifier / combiner, anti-jamming module, transmitting filter, baseband signal processing board, power information board, power filter and so on.

[0092] The anti-jamming antenna array element receives RNSS-B1, RNSS-B3 and RDSS_S and other satellite navigation and positioning radio frequency signals. The RDSS-S and RNSS-B3 navigation radio frequency signals are respectively received by a four-array element receiving array antenna. The noise amplifier (LNA) amplifies, and then converts the four-way navigation signal into an analog intermediate frequency signal after down-conversion, band-pass filtering, amplification and automatic gain control.

[0093] The 4 channels of IF analo...

Embodiment 2

[0097] The key of the present invention is the anti-jamming module, and the design of the anti-jamming module is set forth in detail below:

[0098] · Anti-interference module design

[0099] working principle:

[0100] In the electronic countermeasure environment, the dynamic range of the satellite navigation receiver receiving signal is large, and it is very easy to generate serious nonlinear distortion due to the excessive input signal in the radio frequency amplification link. In order to ensure that the receiver can normally receive the undistorted signal in the electronic countermeasure environment , and to achieve the purpose of effectively suppressing interference, it is usually necessary to design an automatic gain control system with a large dynamic range to achieve a constant level or fluctuate within a small range. Generally, traditional receivers use a feedback analog AGC circuit. Although the gain control of the feedback analog AGC circuit is relatively accurate...

Embodiment 3

[0197] Based on the above anti-jamming module, the software algorithm to realize the all-in-one anti-jamming is an important core. The anti-jamming algorithm is described as follows:

[0198] Broadband Interference Suppression Algorithm

[0199] Space-time adaptive processing (STAP) is to jointly process the data received by multiple array elements (space domain) and multiple time domains through space-time, so that interference suppression can be performed in a space-time two-dimensional space. This technology utilizes the mutual independence of the interference and useful signal space angles to effectively separate the target from the interference and achieve filtering. The space-time adaptive processing technology overcomes the shortage of spatial filtering, and improves the freedom of the array without increasing the number of array elements. The key technology of the anti-interference module is the space-time adaptive filtering technology.

[0200] According to whether ...

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Abstract

The invention provides an anti-broadband interference Beidou vehicle-mounted all-in-one machine. The anti-broadband interference Beidou vehicle-mounted all-in-one machine is composed of a host machineand a cable; the host machine comprises an anti-interference antenna array element, a receiving channel module, a power amplifier/combiner, an anti-interference module, a transmitting filter, a baseband signal processing board, a power source information board, a power source filter and the like; the core of the all-in-one machine of the invention is the anti-interference module; according to theanti-interference module, a frequency domain narrowband interference suppression and space-time adaptive notching processing cascaded mode is adopted, namely, frequency domain narrowband interferencesuppression is performed on intermediate-frequency signals, space-time adaptive processing is performed on a notching result, and therefore, broadband interference can be suppressed. According to theanti-broadband interference Beidou vehicle-mounted all-in-one machine of the invention, anti-interference performance, system complexity degree, reliability, power consumption and other factors are balanced. The anti-broadband interference Beidou vehicle-mounted all-in-one machine can resist narrow-band interference and multi-broadband interference simultaneously, perform up-conversion on interference-cancelled signals so as to obtain radio frequency signals, and process navigation signals according to a conventional method.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and is specifically applied to an anti-broadband interference Beidou vehicle-mounted all-in-one machine. Background technique [0002] The BeiDou Navigation Satellite System (Beidou Navigation Satellite System) is a global satellite navigation system that is being implemented in my country, independently developed and operated completely independently. It has won more and more domestic and foreign applications by virtue of its wide range of services, accurate positioning, and good real-time navigation. attention. The "Beidou II" satellite navigation and positioning system is a dual-band ranging system, which breaks the monopoly of the United States and Russia in global navigation and positioning. play a vital role. [0003] At present, the existing large-scale Beidou vehicle-mounted all-in-one machines in the market do not have anti-jamming functions, and can realize RNSS positio...

Claims

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Application Information

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IPC IPC(8): G01S19/21H04B1/40H04B1/00H04B1/04H04B7/185
CPCG01S19/21H04B1/40H04B1/005H04B1/0475H04B7/18513
Inventor 王秀军黄芳陈恺戚龙星李涛佘波赵娟武秋娜
Owner 江苏无线电厂有限公司
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