CN102565755A - Method for carrying out radio direction finding on broad band by using measured frequency spectrum data - Google Patents
Method for carrying out radio direction finding on broad band by using measured frequency spectrum data Download PDFInfo
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- CN102565755A CN102565755A CN2011104449730A CN201110444973A CN102565755A CN 102565755 A CN102565755 A CN 102565755A CN 2011104449730 A CN2011104449730 A CN 2011104449730A CN 201110444973 A CN201110444973 A CN 201110444973A CN 102565755 A CN102565755 A CN 102565755A
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Abstract
The invention discloses a method for carrying out radio direction finding on a broad band by using measured frequency spectrum data, and is used for solving the problem that the existing method is high in facility requirement and small in direction finding range. In a frequency spectrum monitoring system consisting of a radio-frequency spectrum monitoring device, a directional antenna, an antenna azimuth measuring device, a radio frequency cable, a control cable, a microprocessor, a display and a storage unit, the microprocessor controls the antenna azimuth measuring device and the radio-frequency spectrum monitoring device through computer programs; and the microprocessor transmits frequencies to the radio-frequency spectrum monitoring device, controls the directional antenna to rotate several times, stores a set of intensity data, read from the radio-frequency spectrum monitoring device each time and azimuths together, sequentially compares the intensity data of a fixed frequency point on each azimuth, and according to an amplitude-comparison direction finding algorithm, finds out the azimuth of the maximum or minimum intensity data on the frequency point, namely, the direction-displaying degree of a frequency point k. An operation of repeated comparison is performed until the direction-displaying degrees of all frequency points are calculated.
Description
Technical field:
The present invention is relevant with the radio monitoring technology, and is particularly relevant with wireless direction finding method.
Background technology:
Fast development along with radiotelegraphy; Electromagnetic environment becomes increasingly complex; Various radio interference and radio unknown signal are increasing, and broadband direction finding (direction finding of promptly in than wider frequency, simultaneously the signal of different frequency being carried out) has obtained application more and more widely.How the broadband direction finding realizes with FFT interferometer system.The FFT interferometer system direction finder sensitivity of realizing with passive element array is low; The FFT interferometer system direction finder sensitivity of realizing with the active antenna unit is high slightly, but occurs spurious signal easily; In addition, the direction finding technology of realizing with the FFT interferometer has solved the broadband multifrequency direction finding in the real-time bandwidth, but can not break away from the restriction of real-time bandwidth.
2005; Zhang Qingli of Xian Electronics Science and Technology University and Li Bingbing publish thesis in " aviation computing technique " the 35th the 3rd phase of volume " utilizing frequency spectrograph to realize multi-signal direction-finding "; Proposed a kind of system of multi-signal direction-finding, this technology adopts desk-top computer or notebook computer and frequency spectrograph to join, and gathers the frequency sweep frequency spectrum data; And use the antenna whirligig that fixedly sets up to obtain antenna azimuth, can in the test frequency range, adjust the frequency of 15 type signals as required arbitrarily.This system defect is can not compatible other more radio-frequency spectrum monitoring devices, and can only be used for fixing and set up.In addition, system can automatically identify the position angle and the angle of pitch information of 15 type signals at most, does not possess the function to whole signal simultaneous direction findings in institute's frequency measurement section.
Summary of the invention:
It is compatible to the purpose of this invention is to provide a kind of and multiple radio-frequency spectrum monitoring device; Easy to operate; Can carry out direction finding to all different frequency signals in institute's measured frequency scope simultaneously, the method for utilizing institute's frequency measurement spectrum data to carry out the broadband radio direction finding that direction finder sensitivity is high.
The present invention is achieved in that
The method that the present invention utilizes frequency spectrum data to carry out the broadband radio direction finding, system is made up of radio-frequency spectrum monitoring device, directional antenna, antenna bearingt angle measuring device, radio-frequency cable, umbilical cable, microprocessor, display, memory, and directional antenna and antenna bearingt angle measuring device are connected; Directional antenna is connected with the radio-frequency spectrum monitoring device through radio-frequency cable, and the antenna bearingt angle measuring device is connected with microprocessor through umbilical cable, and the radio-frequency spectrum monitoring device is connected with microprocessor through umbilical cable; Microprocessor is connected with display, memory, and the intensity data array length of radio-frequency spectrum monitoring device is integer m, and m is an integer; Represent m frequency; Frequency is made as f, shows the wide s that is made as, and strength threshold is made as H; The each angle of rotating of directional antenna is △ θ
The step of direction-finding method is following:
(1) microprocessor is transferred to the radio-frequency spectrum monitoring device with frequency f,
(2) directional antenna rotates n time, and microprocessor reads position angle a from the antenna bearingt angle measuring device at every turn
j, j=1～n, n=360/ △ θ round numbers, the directional antenna revolution is moving once, reads common m intensity data h from the radio-frequency spectrum monitoring device
Jk, k=1～m is with position angle a
jDeposit memory in as one group of data together, n group data are gone in coexistence,
(3) comparison n group data intermediate-frequeney point is 1 intensity data h
J1If, all h
J1<h, then relatively frequency is 2 intensity data h
J2, by that analogy, the intensity data with frequency in every group has one at least greater than till the H, according to the amplitude-comprised direction-finding algorithm, finds out in every group with the intensity data maximum of frequency or the position angle a of minimum that group
j, be this frequency show to the degree θ
j,
(4) repeating step (3) is organized the intensity data h that the data intermediate-frequeney point is 1～m with n
JkAll relatively finish, find out showing of all frequencies of meeting condition in the step (3) to degree.
The frequency range of system is f
1～f
2, f
1=f-S/2, f
2=f+S/2, the frequency f of frequency k
k=f
1+ k*s/m, k=1～m, display show showing to degree θ of frequency k
jThe time show the frequency f that this frequency is corresponding simultaneously
k
The present invention utilizes existing FFT frequency spectrum and frequency sweep spectrum monitoring device and antenna bearingt angle measuring device to combine, and by microprocessor control image data, realizes the broadband radio direction finding.Device therefor is simple, and cost is low, and the direction finding bandwidth can be very wide.The FFT frequency spectrum data of the present invention's radio-frequency spectrum monitoring device capable of using (contains the digital frequency sweep frequency spectrum that pursues the frequency range splicing with the FFT frequency spectrum; Together following) and the frequency sweep frequency spectrum data; Simultaneously all different frequency signals in institute's measured frequency scope are carried out direction finding; Can measure more signal than multi-signal direction-finding, only receive the bandwidth constraints of radio-frequency spectrum monitoring device and direction-finder antenna.In addition, the present invention can realize the identification of signal bandwidth.The present invention is the development of mechanical rotation (artificial or automatic) directional antenna amplitude-comprised direction-finding technology, than interferometer system higher sensitivity can be arranged.
Embodiment:
Radio-frequency spectrum monitoring device involved in the present invention is meant instrument, functional module or the radio monitoring system that can measure the radio signal frequency spectrum; Comprise the FFT arrangements for analyzing frequency, have the monitoring receiving trap of FFT spectrum analysis function (to contain the digital frequency sweep receiving trap that pursues the frequency range splicing with the FFT frequency spectrum; Down with), the frequency sweep frequency spectrograph, be the DZR-15 receiver in this example.
Antenna bearingt angle measuring device involved in the present invention is meant can measure directional antenna azimuthal electronic installation or electromechanical integrated device pointed, comprises electronic compass, electromagnetic point meter, automatically controlled The Cloud Terrace (spinner).
Microprocessor can be desk-top microcomputer, portable minisize computing machine, notebook computer, palmtop computer, plate card type microprocessor, embedded microprocessor.
The radio-frequency spectrum monitoring system is made up of spectrum monitoring device, directional antenna, antenna bearingt angle measuring device, radio-frequency cable, umbilical cable, microprocessor, display, memory; Directional antenna and antenna bearingt angle measuring device are connected; Directional antenna is connected with the radio-frequency spectrum monitoring device through radio-frequency cable; The antenna bearingt angle measuring device is connected with microprocessor through umbilical cable; The radio-frequency spectrum monitoring device is connected with microprocessor through umbilical cable, and microprocessor is connected with display, memory, like the system's connected mode described in ZL201020557730.9 or the ZL200920081496.4.
Microprocessor is with computer program control antenna azimuth measuring device and radio-frequency spectrum monitoring device; Fetch antenna bearingt angular data and corresponding frequency spectrum data; Carry out data storage; Utilize the antenna bearingt angular data of having accomplished measurement and record already to carry out data processing then, carry out broadband direction finding and demonstration at the spectral range that is write down with corresponding frequency spectrum data.The radio signal strength data of radio-frequency spectrum monitoring device (expression frequency-intensity corresponding relation) array length is integer m, and array length depends on the monitoring receiving trap, the different monitoring receiving trap, and length maybe be different.System frequency is made as f, shows the wide s that is made as, and strength threshold is made as H, and the frequency range of system is f
1～f
2, f
1=f-s/2, f
2=f+s/2.Directional antenna rotates equivalent angle △ θ at every turn.Step is following:
(1) microprocessor is transferred to frequency f, apparent wide s the control interface (like the network control mouth of the Chengdu dot matrix DZR-15 of Science and Technology Ltd. receiver) of radio-frequency spectrum monitoring device; In display, set up coordinate system; Its transverse axis m length is preset by the radio-frequency spectrum monitoring device, expression radio-frequency band: f
1～f
2, f
1=f-s/2, f
2=f+s/2; Longitudinal axis height is represented radio signal strength;
(2) directional antenna rotates (each anglec of rotation △ θ) n time, and each microprocessor reads position angle a from the antenna bearingt angle measuring device
j, j=1～n, n=360/ △ θ round numbers, the directional antenna revolution is moving, and once microprocessor reads one group of radio signal strength data (array of regular length) from the radio-frequency spectrum monitoring device, and length is integer m, reads m radio signal strength data h
Jk, k is the integer of 1～m.With m radio signal strength data and position angle a
jDeposit memory in as one group of data together, every group of data in the memory have m h
Jk, an a
j, rotate n time, deposit n group data in the memory in;
(3) comparison n group data intermediate-frequeney point is 1 intensity data h
J1If, all h
J1<h, then thinking only has noise on this Frequency point, can't show to degree, and continuation comparison frequency is 2 intensity data h
J2, by that analogy, the intensity data with frequency in every group has one at least greater than till the H, calculates showing to degree θ of this frequency according to amplitude-comprised direction-finding algorithm (like big point of articulation algorithm, little point of articulation algorithm, antenna radiation pattern fitting algorithm)
j, result of calculation θ when selecting big point of articulation algorithm for use
jBe each angle radio signal strength data h with frequency
1k, h
2k... H
NkThe middle pairing orientation angles a of maximal value
j, result of calculation θ when selecting little point of articulation algorithm for use
jBe each angle radio signal strength data h with frequency
1k, h
2k... H
NkThe middle pairing orientation angles a of minimum value
j, antenna radiation pattern fitting algorithm (being the relevant amplitude-comprised direction-finding algorithm of dot matrix) is open in " the Portable Automatic radio monitoring direction-finding system of DZM-80 " the appraisal of scientific and technological achievements meeting development report on June 11st, 2010;
(4) repeating step (3) is organized the intensity data h that the data intermediate-frequeney point is 1～m with n
JkAll relatively finish, find out showing of all frequencies of meeting condition in the step (3) to degree.Display shows showing to degree θ of frequency k
jThe time, show the frequency f that this frequency is corresponding simultaneously
k, the frequency f of frequency k
k=f
1+ k*s/m, k=1～m.
Like this, microprocessor utilizes frequency spectrum, angle-data, each Frequency point is carried out amplitude-comprised direction-finding calculate, and the result is outputed on the display, thereby realize the broader frequency spectrum direction finding, promptly simultaneously all different frequency signals in institute's measured frequency scope is carried out direction finding.
The present invention can further realize the identification of signal bandwidth.Because adjacent Frequency point, if the position angle is consistent, intensity does not have sudden change, just can be judged as same signal, so just can realize the identification of signal bandwidth.
The present invention has more superiority and advance than the multi-signal direction-finding system that mentions in the background technology.Compatibility of the present invention is better, can be matched with more radio-frequency spectrum monitoring device.And broken away from the restriction of desktop computer and notebook computer, can use Embedded microprocessor, both can be applicable to the radio direction-finding system of fixedly setting up, also can be applicable to the radio direction-finding system of the formula of moving.In addition, the present invention can carry out direction finding to all different frequency signals in institute's measured frequency scope simultaneously, can measure more signal than multi-signal direction-finding, and can realize the identification of signal bandwidth.
Claims (2)
1. the method for utilizing frequency spectrum data to carry out the broadband radio direction finding is characterized in that system is made up of radio-frequency spectrum monitoring device, directional antenna, antenna bearingt angle measuring device, radio-frequency cable, umbilical cable, microprocessor, display, memory, and directional antenna and antenna bearingt angle measuring device are connected; Directional antenna is connected with the radio-frequency spectrum monitoring device through radio-frequency cable, and the antenna bearingt angle measuring device is connected with microprocessor through umbilical cable, and the radio-frequency spectrum monitoring device is connected with microprocessor through umbilical cable; Microprocessor is connected with display, memory, and the intensity data array length of radio-frequency spectrum monitoring device is integer m, and m is an integer; Represent m frequency; Frequency is made as f, shows the wide s that is made as, and strength threshold is made as H; The each angle of rotating of directional antenna is △ θ
The step of direction-finding method is following:
(1) microprocessor is transferred to the radio-frequency spectrum monitoring device with frequency f,
(2) directional antenna rotates n time, and microprocessor reads position angle a from the antenna bearingt angle measuring device at every turn
j, j=1～n, n=360/ △ θ round numbers, the directional antenna revolution is moving once, reads common m intensity data h from the radio-frequency spectrum monitoring device
Jk, k=1～m is with position angle a
jDeposit memory in as one group of data together, n group data are gone in coexistence,
(3) comparison n group data intermediate-frequeney point is 1 intensity data h
J1If, all h
J1<h, then relatively frequency is 2 intensity data h
J2, by that analogy, the intensity data with frequency in every group has one at least greater than till the H, according to the amplitude-comprised direction-finding algorithm, finds out in every group with the intensity data maximum of frequency or the position angle a of minimum that group
j, be this frequency show to the degree θ
j,
(4) repeating step (3) is organized the intensity data h that the data intermediate-frequeney point is 1～m with n
JkAll relatively finish, find out showing of all frequencies of meeting condition in the step (3) to degree.
2. method according to claim 1, the frequency range that it is characterized in that system is f
1～f
2, f
1=f-S/2, f
2=f+S/2, the frequency f of frequency k
k=f
1+ k*s/m, k=1～m, display show showing to degree θ of frequency k
jThe time show the frequency f that this frequency is corresponding simultaneously
k
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Cited By (6)
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| CN104010361A (en) * | 2013-02-22 | 2014-08-27 | 中兴通讯股份有限公司 | Positioning system and method |
| CN106489277A (en) * | 2015-06-30 | 2017-03-08 | 华为技术有限公司 | A kind of method for handling carriers based on identical networking and device |
| CN107561593A (en) * | 2017-05-12 | 2018-01-09 | 广州联通控股有限公司 | A kind of small-sized unmanned aircraft composite detecting device |
| CN108802668A (en) * | 2018-05-02 | 2018-11-13 | 桂林长海发展有限责任公司 | A kind of multifunctional radiation source angle of arrival simulator and method |
| CN109655673A (en) * | 2018-12-11 | 2019-04-19 | 深圳市觅拓物联信息技术有限公司 | A kind of monitoring method and system of directional aerial angle |
| CN110794362A (en) * | 2019-09-30 | 2020-02-14 | 西安空间无线电技术研究所 | Short-pulse high-power microwave rapid direction finding system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104010361A (en) * | 2013-02-22 | 2014-08-27 | 中兴通讯股份有限公司 | Positioning system and method |
| WO2014127612A1 (en) * | 2013-02-22 | 2014-08-28 | 中兴通讯股份有限公司 | Angle determining system and method |
| CN104010361B (en) * | 2013-02-22 | 2018-04-10 | 中兴通讯股份有限公司 | Alignment system and method |
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| CN106489277A (en) * | 2015-06-30 | 2017-03-08 | 华为技术有限公司 | A kind of method for handling carriers based on identical networking and device |
| CN106489277B (en) * | 2015-06-30 | 2019-11-12 | 华为技术有限公司 | A kind of method for handling carriers and device based on identical networking |
| CN107561593A (en) * | 2017-05-12 | 2018-01-09 | 广州联通控股有限公司 | A kind of small-sized unmanned aircraft composite detecting device |
| CN108802668A (en) * | 2018-05-02 | 2018-11-13 | 桂林长海发展有限责任公司 | A kind of multifunctional radiation source angle of arrival simulator and method |
| CN109655673A (en) * | 2018-12-11 | 2019-04-19 | 深圳市觅拓物联信息技术有限公司 | A kind of monitoring method and system of directional aerial angle |
| CN110794362A (en) * | 2019-09-30 | 2020-02-14 | 西安空间无线电技术研究所 | Short-pulse high-power microwave rapid direction finding system and method |
| CN110794362B (en) * | 2019-09-30 | 2022-04-12 | 西安空间无线电技术研究所 | Short-pulse high-power microwave rapid direction finding system and method |
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Application publication date: 20120711 |