CN104076368B - GPS anti-interference antenna technology - Google Patents
GPS anti-interference antenna technology Download PDFInfo
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- CN104076368B CN104076368B CN201410292998.7A CN201410292998A CN104076368B CN 104076368 B CN104076368 B CN 104076368B CN 201410292998 A CN201410292998 A CN 201410292998A CN 104076368 B CN104076368 B CN 104076368B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a GPS anti-interference antenna which comprises an antenna array, a radio frequency front end module, an analog-digital conversion module, an adaptive processing module and a beam forming network. The antenna array comprises N antenna array elements, N is larger than or equal to four and smaller than or equal to 16, the space between adjacent array elements is half of center frequency wave length of received signals, and a power inversion algorithm is built in the antenna array. The radio frequency front end module comprises N radio frequency front ends, each radio frequency front end comprises a first band-pass filter, an amplifier, a mixer, an RF local oscillator generator, a second band-pass filter and an intermediate frequency amplifier, wherein the first band-pass filters, the amplifiers, the mixers, the second band-pass filters and the intermediate frequency amplifiers are connected in sequence, and the RF local oscillator generators are connected with the mixers and input local oscillating signals. The GPS anti-interference antenna can effectively eliminate strong interference signals, receive useful signals, and achieve signal receiving in harsh electromagnetic environments.
Description
Technical field
The present invention relates to satellite navigation positioning technical field, more particularly, to a kind of gps anti-interference antenna technology.
Background technology
Technique of Satellite Navigation and Positioning all has huge value in military affairs or business application.Navigator fix is defended
High accuracy, round-the-clock, round-the-clock navigation, positioning and time service information that star system sends, are a kind of available sea, land and sky
The army and the people's users to share information resources, who has this technology and ability, just occupy actively in military, diplomacy with economically.
Therefore, various countries obtain satellite navigation information and have carried out extensively to any more accurately satellite navigation information and prevention other party of obtaining
Research, satellite navigation system perturbation technique and the Anti-Jamming Technique being born therewith become the focus of research.
Content of the invention
The technical problem being existed based on background technology, the present invention proposes a kind of gps anti-interference antenna, can effectively eliminate strong
Interference signal, receives useful signal, solves the signal Receiver Problem of bad electromagnetic environment.
A kind of gps anti-interference antenna proposed by the present invention, comprising: aerial array, RF front-end module, analog digital conversion mould
Block, self-adaptive processing module and beam-forming network；Wherein,
Aerial array, comprises n bay, 4 n 16, adjacent array element distance takes receipt signal center frequency wavelength
1/2, aerial array built-in power inversion algorithm；
RF front-end module, comprises n radio-frequency front-end, and radio-frequency front-end includes the first band filter, amplifier, mixing
Device, rf local oscillator generator, the second band filter and intermediate frequency amplifier, wherein, the first band filter, amplifier, frequency mixer,
Second band filter and intermediate frequency amplifier are sequentially connected, and rf local oscillator generator connects frequency mixer input local oscillation signal；
Analog-digital converter, including n analog-digital converter, the descending of analog-digital converter converts analog signals into numeral letter
Number, up convert digital signals into analogue signal；
Self-adaptive processing module, including n adaptive processor, the built-in adaptive algorithm of adaptive processor, according to certainly
Adapt to spatial filter or the arrival bearing of beam forming algorithm and estimation produces weights；
Beam-forming network, carries out dynamic self-adapting weighting and processes to produce desired adaptive beam；
N bay, n radio-frequency front-end, n analog-digital converter, n adaptive processor correspond, before radio frequency
In end, the input of the first band filter connects corresponding bay receipt signal, and the outfan connection of intermediate frequency amplifier is right
The analog-digital converter output signal answered, analog-digital converter connects corresponding adaptive processor, and each adaptive processor is equal
Connect to beam-forming network；
Under in working order, antenna utilizes adaptive beamforming technology to form aerial radiation in interference signal arrival direction
Directional diagram null, forms zero point in interference ripple direction, shields interference signal.
Preferably, aerial array is quaternary circular array.
The present invention adopts adaptive smart antenna technology, facilitates implementation, anti-jamming effectiveness is good, only need to increase several gps
(global positioning system, global positioning system) reception antenna and block adaptive antenna zeroing digital signal
Process plate, connects in frame for movement and electrical equipment and does a less electronics changed it is possible to effective suppression is not intended to or enemy has a mind to
Interference, ensures the normal resolving of civilian gps receiver navigation data, improves the adaptation modern war of gps commercial receiver badly electric
The fight capability of magnetic environment, can support operation over strait, and the operation to emphasis, regional area has very great military significance.
Meanwhile, this system is readily adaptable for use in the various civilian occasions that there is interference, has important society and economic implications.The present invention
In be designed with radio-frequency front-end, aerial signal is filtered and amplifies, be subsequent treatment provides convenient.
Brief description
Fig. 1 is quaternary circular array schematic diagram；
Fig. 2 is structure of radio-frequency front end figure.
Specific embodiment
A kind of gps anti-interference antenna proposing with reference to Fig. 1, Fig. 2, present embodiment, comprising: aerial array, radio-frequency front-end
Module, analog-to-digital conversion module, self-adaptive processing module and beam-forming network.
Aerial array, is the quaternary circular array based on Power-inversion algorithm, includes four bays, and four
It is circle that the signal of bay receives overlay area, is received using the signal that minimum bay realizes 360 degrees omnidirection,
Reasonable in design, consume few, signal receives completely and repeats few.In aerial array, adjacent array element distance takes receipt signal mid frequency
The 1/2 of wavelength, it is to avoid the omission that signal receives.
Power-inversion algorithm, to the useful signal receiving and interference signal, is all suppressed, and its beam pattern has at each
Produce null with signal and interference signal direction, and signal is stronger, corresponding null is deeper, to the elimination of high reject signal very
Ideal, thus this array is highly effective to the reception of small-signal.
RF front-end module, comprises four radio-frequency front-ends.Radio-frequency front-end includes the first band filter, amplifier, mixing
Device, rf local oscillator generator, the second band filter and intermediate frequency amplifier, wherein, the first band filter, amplifier, frequency mixer,
Second band filter and intermediate frequency amplifier are sequentially connected, and rf local oscillator generator connects frequency mixer input local oscillation signal.
Analog-digital converter, including four analog-digital converters (analog/digital, a/d), is about under analog-digital converter
Analogue signal is converted into digital signal and conveniently carries out signal processing, and the up analogue signal that converts digital signals into conveniently carries out letter
Number transmission.
Self-adaptive processing module, including four adaptive processors w1, w2, w3 and w4.Adaptive processor is built-in adaptive
Answer algorithm, the arrival bearing according to adaptive spatial filter or beam forming algorithm and estimation produces weights.
Beam-forming network, carries out dynamic self-adapting weighting and processes to produce desired adaptive beam.
Antenna structure in present embodiment is simple, it is easy to accomplish, wherein, four bays, four radio-frequency front-ends, four
Individual analog-digital converter, four adaptive processors correspond, and in radio-frequency front-end, the input connection of the first band filter is right
The bay receipt signal answered, the outfan of intermediate frequency amplifier connects corresponding analog-digital converter output signal, analog digital conversion
Device connects corresponding adaptive processor, and each adaptive processor is connected to beam-forming network.
Bay receipt signal, radio-frequency front-end is filtered to the signal receiving and amplifies, and is that subsequent treatment is established
Basis, the analogue signal receiving is converted to digital signal and is easy to process by analog-digital converter, and adaptive processor is respectively directed to
The signal receiving is weighted, and beam-forming network carries out integrated treatment to produce desired self adaptation ripple to weighted signal
Bundle, thus eliminating interference signal, receives useful signal.
In present embodiment, antenna utilizes Adaptive beamformer technology to form aerial radiation in interference signal arrival direction
Directional diagram null, forms zero point in interference ripple direction, plays shielding action with this to interference signal.The advantage of this antenna is energy
Enough it is completely independent work, is not required to the support of other external devices, be also not required to carry out any modification to the software in receiver.
When being embodied as, aerial array can comprise n bay, 4 n 16, and adjacent array element distance takes receipt signal
The 1/2 of center frequency wavelength, RF front-end module comprises n radio-frequency front-end, and analog-digital converter includes n analog-digital converter, from
Adapt to processing module and include n adaptive processor, n bay, n radio-frequency front-end, n analog-digital converter, n are individual adaptive
Processor is answered to correspond, in radio-frequency front-end, the input of the first band filter connects corresponding bay, intermediate frequency amplifies
The outfan of device connects corresponding analog-digital converter, and analog-digital converter connects corresponding adaptive processor, each self adaptation
Processor is connected to beam-forming network.
Due to when gps satellite-signal reaches terrestrial user receiver quite faint (about -160dbw), than the heat of receiver
Noise also will low about 30db, faint interference this may result in gps receiver and can not stablize, particularly artificial pernicious interference,
Lead to system accuracy reduce even cannot normal work, lose homing capability, gps Anti-Jamming Technique has become as satellite navigation and connects
Receipts machine is badly in need of the key issue solving.The interference of gps receiver is mainly reflected in frequency interferences and power disturbance, therefore, improves
The method for designing of the interference free performance of gps receiver is exactly from raising signal reception power and filtering technique.
The gps anti-interference antenna technology proposing in embodiment of above, using adaptive smart antenna technology, is easy to reality
Existing, anti-jamming effectiveness is good, and only need to increase several gps reception antennas and block adaptive antenna zeroing Digital Signal Processing
Plate, connects in frame for movement and electrical equipment and does a less electronic interferences changed it is possible to effective suppression is not intended to or enemy has a mind to,
Ensure the normal resolving of civilian gps receiver navigation data, improve gps commercial receiver and adapt to modern war bad electromagnetic environment
Fight capability, operation over strait can be supported, the operation to emphasis, regional area has very great military significance.Meanwhile, should
System is readily adaptable for use in the various civilian occasions that there is interference, has important society and economic implications.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (1)
1. a kind of gps anti-interference antenna it is characterised in that include: aerial array, RF front-end module, analog-to-digital conversion module, from
Adapt to processing module and beam-forming network；Wherein,
Aerial array, comprises n bay, 4 n 16, adjacent array element distance takes the 1/ of receipt signal center frequency wavelength
2, aerial array built-in power inversion algorithm, aerial array is quaternary circular array；
RF front-end module, comprises n radio-frequency front-end, and radio-frequency front-end includes the first band filter, amplifier, frequency mixer, rf
Local oscillator generator, the second band filter and intermediate frequency amplifier, wherein, the first band filter, amplifier, frequency mixer, second
Band filter and intermediate frequency amplifier are sequentially connected, and rf local oscillator generator connects frequency mixer input local oscillation signal；
Analog-digital converter, including n analog-digital converter, the descending of analog-digital converter converts analog signals into digital signal, on
Row converts digital signals into analogue signal；
Self-adaptive processing module, including n adaptive processor, the built-in adaptive algorithm of adaptive processor, according to self adaptation
The arrival bearing of spatial filter or beam forming algorithm and estimation produces weights；
Beam-forming network, carries out dynamic self-adapting weighting and processes to produce desired adaptive beam；
N bay, n radio-frequency front-end, n analog-digital converter, n adaptive processor correspond, in radio-frequency front-end
The input of the first band filter connects corresponding bay receipt signal, and the outfan connection of intermediate frequency amplifier is corresponding
Analog-digital converter output signal, analog-digital converter connects corresponding adaptive processor, and each adaptive processor is all connected with
To beam-forming network；
Under in working order, antenna utilizes adaptive beamforming technology to form aerial radiation direction in interference signal arrival direction
Figure null, forms zero point in interference ripple direction, shields interference signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627803A (en) * | 2017-03-17 | 2018-10-09 | 南京理工大学 | Spectral pair method based on Wave beam forming and pair system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104635244A (en) * | 2015-02-03 | 2015-05-20 | 芜湖航飞科技股份有限公司 | Anti-interference antenna on satellite navigation receiver |
| CN106291605B (en) * | 2016-08-30 | 2018-08-21 | 北京航天长征飞行器研究所 | A kind of satellite navigation anti-interference reception system |
| CN106452549B (en) * | 2016-10-11 | 2019-12-20 | 西安华讯天基通信技术有限公司 | ADS-B remote anti-interference anti-spoofing receiving method and device based on intelligent antenna |
| CN106646528A (en) * | 2016-11-03 | 2017-05-10 | 中国科学院云南天文台 | System and method of eliminating interference on navigation signals by solar radio burst based on auxiliary antenna |
| CN107666333A (en) * | 2017-01-20 | 2018-02-06 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Expansion/Frequency Hopping Signal system array antenna Adaptive beamformer system |
| CN108519608A (en) * | 2018-03-09 | 2018-09-11 | 中国航天电子技术研究院 | A kind of satellite navigation based on array antenna is anti-interference and surveys attitude positioning method |
| CN108768418B (en) * | 2018-06-05 | 2020-03-31 | 湖南智领通信科技有限公司 | Antenna radio frequency front end device with direction finding and active anti-interference functions |
| CN110137695A (en) * | 2019-05-07 | 2019-08-16 | 北京国科导通科技有限公司 | Seven vibration element array antenna of one kind |
| CN112763822B (en) * | 2020-12-23 | 2023-01-06 | 北京无线电计量测试研究所 | Anti-interference measuring device and measuring system of antenna |
| CN113495284A (en) * | 2021-09-02 | 2021-10-12 | 北京航空航天大学 | Satellite navigation deception jamming sensing and restraining system and method based on beam scanning |
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| US7786933B2 (en) * | 2007-05-21 | 2010-08-31 | Spatial Digital Systems, Inc. | Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiver |
| CN202759018U (en) * | 2012-09-06 | 2013-02-27 | 重庆九洲星熠导航设备有限公司 | GPS anti-interference antenna based on adaptive space-time filtering |
| CN103869347A (en) * | 2014-03-25 | 2014-06-18 | 芜湖航飞科技股份有限公司 | Beidou satellite navigation and positioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627803A (en) * | 2017-03-17 | 2018-10-09 | 南京理工大学 | Spectral pair method based on Wave beam forming and pair system |
| CN108627803B (en) * | 2017-03-17 | 2021-10-08 | 南京理工大学 | Spectrum pairing method and system based on beam forming |
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