CN109085532A - A kind of large aperture Two-dimensional Short Wave direction-finding system - Google Patents
A kind of large aperture Two-dimensional Short Wave direction-finding system Download PDFInfo
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- CN109085532A CN109085532A CN201810999011.3A CN201810999011A CN109085532A CN 109085532 A CN109085532 A CN 109085532A CN 201810999011 A CN201810999011 A CN 201810999011A CN 109085532 A CN109085532 A CN 109085532A
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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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
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Abstract
The invention discloses a kind of large aperture Two-dimensional Short Wave direction-finding systems, are related to communication countermeasure field and spectrum monitoring field.It includes antenna array, narrowband direction-finding system, broadband direction-finding system, and monitoring and Signal Analysis System.The present invention has designed and Implemented that a kind of direction finding precision is high, operating distance is remote, homogenous frequency signal immunity to interference is strong, common-frequency multi-signal processing capacity is high, the large aperture Two-dimensional Short Wave direction-finding system with mono-station location ability, have many advantages, such as that direction finding precision is high, operating distance is remote, homogenous frequency signal immunity to interference is strong, common-frequency multi-signal processing capacity is high, have mono-station location ability, is applicable to the application fields such as communication countermeasure, radio monitoring, spectrum management.Its reliable performance has stronger application value.
Description
Technical field
The present invention relates to communication countermeasure technical fields and spectrum monitoring technical field, and it is short to particularly relate to a kind of large aperture two dimension
Wave direction-finding system.
Background technique
Communication countermeasure and spectrum monitoring field are related to direction detection wide aperture antenna Array Design and realization technology, digital wave
Under beam forms and merges integrated technique with analog beam formation, broadband monitors and direction finding channelization technique, complex electromagnetic environment
The key technologies such as the design of robust two-dimensional space Power estimation Direction Finding Algorithm and realization technology.
Currently, it is smaller to focus primarily upon aerial array aperture for the research of communication countermeasure and spectrum monitoring in open source literature
Equipment or system, function is more single.In addition, domestic and foreign scholars primarily focus on two-dimentional battle array in the document published
The research of column processing algorithm, there is not yet collection wide aperture antenna Array Design and realization technology, digital beam froming and analog beam
Fusion integrated technique, broadband monitoring and the robust two-dimensional space spectrum under direction finding channelization technique, complex electromagnetic environment is formed to estimate
Direction Finding Algorithm design is counted with the technology of realization in the direction-finding system of one.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of large aperture Two-dimensional Short Wave direction-finding system, with direction finding essence
Degree is high, operating distance is remote, homogenous frequency signal immunity to interference is strong, common-frequency multi-signal processing capacity is high, has the advantages that mono-station location ability.
To achieve the goals above, present invention employs following technical solutions:
A kind of large aperture Two-dimensional Short Wave direction-finding system comprising antenna array, narrowband direction-finding system, broadband direction-finding system, Yi Jijian
Survey and Signal Analysis System；
The antenna array include an array aperture be 340 meters outer layer circle battle array, an array aperture be 120 meters internal layer circle battle array
And the center array element positioned at array the center point, outer layer, which is justified, has been respectively uniformly distributed 36 array elements in battle array and internal layer circle battle array；
The narrowband direction-finding system includes narrowband direction-finder antenna switch, short wave channel unit and narrowband direction finding processing unit；Institute
It states and contains calibration source inside narrowband direction-finder antenna switch, for realizing calibration letter under the control of narrowband direction finding processing unit
Number, the switching of outer layer aerial signal and internal layer aerial signal；The short wave channel unit for radiofrequency signal is preselected,
Frequency conversion, filtering and amplification, and intermediate-freuqncy signal is exported to narrowband direction finding processing unit；The narrowband direction finding processing unit is used for centering
Frequency signal carries out A/D sampling, Digital Down Convert and FFT processing, and realizes the direction finding to signal and Beam synthesis；
The broadband direction-finding system includes broadband direction-finder antenna switch, short wave channel unit and broadband direction finding processing cabinet；Institute
Broadband direction-finder antenna switch is stated for generating self-correcting signal, and needs to select 36 antennas of internal layer or outer according to working frequency range
The signal of 36 antenna of layer, to realize letter needed for access band direction-finding receiver under self-correcting and two kinds of direction finding modes of direction finding
Number；The short wave channel unit for the radiofrequency signal from antenna or self-correcting source to be preselected, frequency conversion, filtering and amplification,
And frequency and amplitude are adjusted to be suitble to the IF frequency of direction finding processing cabinet sampling；Broadband direction finding processing cabinet for pair
Intermediate-freuqncy signal carries out A/D sampling, Digital Down Convert and FFT processing, and realizes the direction finding to signal and Beam synthesis；
The monitoring includes analog beam synthesis device, function subset, broadband monitoring device, narrowband monitoring with Signal Analysis System
Receiver and monitoring of software and database are handled and remote for realizing the sorting of short-wave signal fast search, analysis direction finding, storage
Journey access function；Wherein:
The analog beam synthesis device is used to carry out the synthesis of high-gain narrow beam to the continuous aerial signal of circle battle array, according to not on the same day
The received incoming wave signal of antenna continuous in normal direction is passed through the different time in the phase response of different arrival bearings by line respectively
After delay, in-phase stacking is carried out, to improve the gain of synthesis and receive the signal-to-noise ratio of signal；
The function subset is used to amplify radiofrequency signal and branch, realizes that the signals of more set broadband monitoring devices share；
The broadband monitoring device is searched for realizing spectrum monitoring, the signal of full frequency band or designated frequency band within the scope of 1 ~ 30MHz
Rope, discrete channel scanning, frequency hopping intercepting and capturing and 1024 railway digital down coversions and analog demodulator function, the conventional numerical solution on 1024 tunnels
The signal analysis and parameter measurement function of tune, the demodulating and decoding of specified protocol, 1024 tunnels；
The narrowband monitoring receiver includes digit extension and simulation extension set, wherein simulating extension set for the 12 road 1MHz from antenna
~ 30MHz signal exports the intermediate-freuqncy signal of 40.355MHz after frequency conversion, and is supplied to digital cabinet and carries out sampling processing.
Further, this system further includes monitoring subsystem；
The monitoring subsystem includes 7 class servers and 4 operation seats, and 4 operation seats include 1 plan of operation seat
Position, 1 DF and location seat, 1 signal monitoring seat and 1 off-line analysis seat；
The plan of operation seat reports information, internally passes through for externally receiving higher level's monitoring plan, superior monitoring center
The mode of task is coordinated to stand the orderly progress of interior every monitoring business, carries out on duty, information dissemination management, generates daily paper, monthly magazine；
The DF and location seat and signal monitoring seat are used to scan for signal, intercept and capture, monitor and control is kept, and realizes to letter
Number detection, direction finding, analysis, demodulation, decoding and information source restore；
The off-line analysis seat is used to carry out signal offline inspection, demodulation, decoding, information source recovery and code stream and handles.
Further, the monitoring has warm standby function with the database in Signal Analysis System, stores in database
Data include initial data index database, information input library, information processing library, information products library, information system base library, information
System command and control library and information system business support library.
The present invention has the following advantages over the background art:
(1) the circle battle array that array aperture is 340 meters, element number of array are 73, and direction finding precision is high；It breaks down in respective antenna array element
In the case where, direction finding precision with higher and the processing capacity to homogenous frequency signal are remained to, the reliability of system is improved；
(2) have super-resolution direction finding ability, direction finding precision high；
(3) there is signal profound level protocal analysis and autonomous learning expandability；
(4) monitoring capability is strong, can not only carry out instantaneous full frequency band monitoring to shortwave frequency band signals, moreover it is possible at the same it is narrow to 1024 tunnels
Band signal is monitored, analyzes；
(5) high degree of automation, system institute is functional can to realize linkage automatically, and broadband can guide narrowband automatically, and direction finding can be certainly
Dynamic guiding monitoring.
In short, the present invention has super-resolution direction finding ability, direction finding precision high；With signal profound level protocal analysis and independently
Learn expandability；Monitoring capability is strong, can not only carry out instantaneous full frequency band monitoring to shortwave frequency band signals, moreover it is possible at the same it is right
1024 road narrow band signals are monitored, analyze；High degree of automation, system institute is functional can to realize linkage, broadband energy automatically
Automatic guidance narrowband, direction finding can automatic guiding monitorings；It is applicable to the application neck such as communication countermeasure, radio monitoring, spectrum management
Domain.Its reliable performance has stronger application value.
Detailed description of the invention
Fig. 1 is a functional block diagram of the embodiment of the present invention.
Fig. 2 is a kind of structural schematic diagram of antenna array in the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of notch diplexer in Fig. 1.
Fig. 4 is the structural block diagram of narrowband direction-finding system in Fig. 1.
Fig. 5 is the structural block diagram of Fig. 1 middle width strip direction-finding system.
Fig. 6 is the structural block diagram monitored in Fig. 1 with Signal Analysis System.
Fig. 7 is the structural block diagram of analogsimulation Beam synthesis equipment in Fig. 6.
Specific embodiment
Referring to Fig.1~7, a kind of large aperture Two-dimensional Short Wave direction-finding system comprising antenna array, narrowband direction-finding system, broadband
Direction-finding system, and monitoring and Signal Analysis System；
The antenna array include an array aperture be 340 meters outer layer circle battle array, an array aperture be 120 meters internal layer circle battle array
And the center array element positioned at array the center point, outer layer, which is justified, has been respectively uniformly distributed 36 array elements in battle array and internal layer circle battle array；
The narrowband direction-finding system includes narrowband direction-finder antenna switch, short wave channel unit and narrowband direction finding processing unit；Institute
It states and contains calibration source inside narrowband direction-finder antenna switch, for realizing calibration letter under the control of narrowband direction finding processing unit
Number, the switching of outer layer aerial signal and internal layer aerial signal；The short wave channel unit for radiofrequency signal is preselected,
Frequency conversion, filtering and amplification, and intermediate-freuqncy signal is exported to narrowband direction finding processing unit；The narrowband direction finding processing unit is used for centering
Frequency signal carries out A/D sampling, Digital Down Convert and FFT processing, and realizes the direction finding to signal and Beam synthesis；
The broadband direction-finding system includes broadband direction-finder antenna switch, short wave channel unit and broadband direction finding processing cabinet；Institute
Broadband direction-finder antenna switch is stated for generating self-correcting signal, and needs to select 36 antennas of internal layer or outer according to working frequency range
The signal of 36 antenna of layer, to realize letter needed for access band direction-finding receiver under self-correcting and two kinds of direction finding modes of direction finding
Number；The short wave channel unit for the radiofrequency signal from antenna or self-correcting source to be preselected, frequency conversion, filtering and amplification,
And frequency and amplitude are adjusted to be suitble to the IF frequency of direction finding processing cabinet sampling；Broadband direction finding processing cabinet for pair
Intermediate-freuqncy signal carries out A/D sampling, Digital Down Convert and FFT processing, and realizes the direction finding to signal and Beam synthesis；
The monitoring is set with Signal Analysis System including 1 set of simulation Beam synthesis equipment, 1 set of function subset, 1 set of broadband monitoring
Standby, 1 set of narrowband monitoring receiver, 1 set of monitoring of software and database are surveyed for realizing the sorting of short-wave signal fast search, analysis
To, storage processing and remote access function；Wherein:
The analog beam synthesis device is used to carry out the synthesis of high-gain narrow beam to the continuous aerial signal of circle battle array, according to not on the same day
The received incoming wave signal of antenna continuous in normal direction is passed through the different time in the phase response of different arrival bearings by line respectively
After delay, in-phase stacking is carried out, to improve the gain of synthesis and receive the signal-to-noise ratio of signal；
The function subset is used to amplify radiofrequency signal and branch, realizes that the signals of more set broadband monitoring devices share；
The broadband monitoring device is searched for realizing spectrum monitoring, the signal of full frequency band or designated frequency band within the scope of 1 ~ 30MHz
Rope, discrete channel scanning, frequency hopping intercepting and capturing and 1024 railway digital down coversions and analog demodulator function, the conventional numerical solution on 1024 tunnels
The signal analysis and parameter measurement function of tune, the demodulating and decoding of specified protocol, 1024 tunnels；
The narrowband monitoring receiver includes digit extension and simulation extension set, wherein simulating extension set for the 12 road 1MHz from antenna
~ 30MHz signal exports the intermediate-freuqncy signal of 40.355MHz after frequency conversion, and is supplied to digital cabinet and carries out sampling processing.
Further, this system further includes monitoring subsystem；
The monitoring subsystem includes 7 class servers and 4 operation seats, and 4 operation seats include 1 plan of operation seat
Position, 1 DF and location seat, 1 signal monitoring seat and 1 off-line analysis seat；
The plan of operation seat reports information, internally passes through for externally receiving higher level's monitoring plan, superior monitoring center
The mode of task is coordinated to stand the orderly progress of interior every monitoring business, carries out on duty, information dissemination management, generates daily paper, monthly magazine；
The DF and location seat and signal monitoring seat are used to scan for signal, intercept and capture, monitor and control is kept, and realizes to letter
Number detection, direction finding, analysis, demodulation, decoding and information source restore；
The off-line analysis seat is used to carry out signal offline inspection, demodulation, decoding, information source recovery and code stream and handles.
Further, the monitoring has warm standby function with the database in Signal Analysis System, stores in database
Data include initial data index database, information input library, information processing library, information products library, information system base library, information
System command and control library and information system business support library.
Specifically, this system is a kind of Two-dimensional Short Wave direction-finding system based on large-scale antenna array, mainly by large-scale day
Linear array, narrowband direction-finding system, broadband direction-finding system, monitoring and Signal Analysis System, server, mass storage, operation seat
The compositions such as position, monitoring seat, plant maintenance seat and other auxiliary facilities.Wherein:
Antenna array is divided into inside and outside two layers of round battle array, and every layer is made of 36 equally distributed vertical polarization merogenesis payload antennas, outer layer
340 meters of battle array aperture of circle is mainly used for receiving low section of short-wave signal of 1 MHz ~ 10MHz, and 120 meters of battle array aperture of internal layer circle is mainly used for
Receive 10MHz ~ 30MHz high section short-wave signal.
Notch diplexer receives the ectonexine totally 72 road signal of direction estimation antenna array output, carries out branch to it.Direction-finder antenna
The signal and self-correcting source signal of switch receiving antenna multicoupler output realize internal layer antenna, outer layer antenna and self-correcting source letter
Number switching, output multi-channel radiofrequency signal.
Signal processing general-purpose platform use the general hardware platform based on VPX bus, realize broadband direction finding, narrowband direction finding,
The processing functions such as broadband monitoring, narrowband monitoring.Under typical case mode, it is possible to provide a set of broadband direction finding, a set of narrowband direction finding, one
Cover the ability of the monitoring of 12 road narrowbands and broadband monitoring.Its middle width strip direction-finding equipment is mainly used for short-wave all-frequency band or emphasis frequency range
Scan direction finding, provide and show to degree for wide band scan, generally investigated for signal, control can also be carried out to designated frequency band and is kept, be used for frequency hopping,
The intercepting and capturing of the short persistent signals such as burst；Narrowband direction-finding equipment is mainly used for accurate direction finding and positioning to specified echo signal,
It can carry out digital bea mforming；Broadband monitoring device, which can be realized, monitors shortwave frequency range all standing；Narrowband monitoring is mainly used for
Monitoring analysis to small and weak signal.
Timing equipment exports GPS standard time and second pulse signal, and when unifying school for each equipment in system, signal processing is flat
Markers is added in monitoring data by platform.
System function is completed by 7 class servers and 6 operation seat collaborations.Externally receive higher level's monitoring plan, superior
Monitoring center reports information, and the orderly progress for interior every monitoring business of internally coordinating to stand by way of task carries out on duty, letter
Breath distribution management, generates daily paper, monthly magazine.Search, intercepting and capturing, monitoring, the control of the main complete pair signals in monitoring seat such as keep at the functions, real
Now the detection of signal, analysis, demodulation, decoding, information source are restored, realize detection, the direction finding etc. to signal.
Database has warm standby function, ensure that the reliability of data storage, the data of storage include initial data rope
Draw library, information input library, information processing library, information products library, information system base library, information system command and control library, information
System business supports library etc..
The advantages of system, is as follows:
System can be realized common-frequency multi-signal oversubscription using Estimation of Spatial Spectrum, interferometer direction finding system using array-processing techniques
Distinguish direction finding；
System can be realized two-dimentional direction finding, have mono-station location ability；
System forms integrated technique using digital beam froming and analog beam, substantially increases system to the prison of small and weak signal
Survey ability；
System can carry out instantaneous full frequency band monitoring to shortwave frequency band signals；
System can supervise 1024 road narrow band signals while being monitored to full frequency band using width combination technology
It surveys, analysis；
System institute is functional can to realize linkage automatically；
Broadband can guide narrowband automatically, and direction finding can automatic guiding monitoring；
The self-checking function of system being capable of automatic fault location extension set；
Signal specific monitoring, analysis based on characteristic matching are fully automated；
System core equipment shares same hardware platform, and versatility, standard, scalability and the Ke Wei of system greatly improved
Shield property.
System can not only analyze the frame lattice of signal modulation pattern, transmission rate, signal bandwidth, number of subcarriers, signal
The parameters such as formula, coding mode also utilize Network topology technology, by constructing short wave communication protocol characteristic library, construction feature
The mapping table of parameter and protocol type, the matched method of application template realize that the layer-by-layer protocol type of short-wave signal identifies, and according to
Processing is decoded to short-wave signal according to standard agreement.
The main points of the system include:
(1) the circle battle array that array aperture is 340 meters, element number of array are 73；
(2) direction finding system uses Estimation of Spatial Spectrum and correlation interferometer system, realizes super-resolution, high-precision, quick direction finding；
(3) system forms integrated technique using digital beam froming and analog beam, substantially increases system to small and weak signal
Monitoring capability；
(4) system can carry out 1024 road narrow band signals while being monitored to full frequency band using width combination technology
Monitoring, analysis；
(5) system core equipment shares same hardware platform, greatly improved the versatility of system, standard, scalability and
It is maintainable；
(6) system can not only analyze the frame lattice of signal modulation pattern, transmission rate, signal bandwidth, number of subcarriers, signal
The parameters such as formula, coding mode also utilize Network topology technology, by constructing short wave communication protocol characteristic library, construction feature
The mapping table of parameter and protocol type, the matched method of application template realize that the layer-by-layer protocol type of short-wave signal identifies, and according to
Processing is decoded to short-wave signal according to standard agreement.And there is autonomous learning and extended capability, adapt to emerging shortwave
Signal.
Functional character possessed by the system includes:
A) working frequency range: 1MHz~30MHz；
B) the Research of Antenna Polarization: vertical；
C) instant bandwidth:
1) broadband direction finding: 2MHz；
2) narrowband direction finding: 20kHz；
D) bandwidth: 29MHz(1 MHz ~ 30MHz, full frequency band is monitored)；
E) direction-finding bearing precision :≤1 ° (RMS, 1MHz~30MHz)；
F) direction finder sensitivity :≤0.5 μ V/m；
G) direction finding resolution ratio :≤8 ° (frequency 10MHz, earthwave test)；
H) SSL error: 10%(100km ~ 1200km of≤actual range)；
I) direction finding system: Estimation of Spatial Spectrum, interferometer etc.；
J) signal modulation mode: any；
K) the direction finding unit element duration :≤5ms
L) direction finding resolution capability:
1) frequency discrimination ability :≤15Hz；
2) spatial resolving power :≤1/2 lobe width (>=3 homogenous frequency signals)；
M) with frequency direction finding immunity to interference: >=30dB；
N) Wave beam forming system: digital beam froming, analog beam are formed；
O) monitoring signals type
1) shortwave normal signal: AM signal, FM signal, SSB, craft and machinery Morse signal, fsk signal, psk signal, parallel
Multiple signals (16T, 39T etc.), PSM signal etc.；
2) HF frequency hopping: 5-200 jump/second；
3) shortwave burst signal；
P) demodulated signal Modulation Types
1) analog signal: CW, AM, FM, SSB(USB, LSB)；
2) digital signal: 2FSK, 4FSK, 8FSK, BPSK, QPSK, 8PSK；
Q) signal profound level analysis ability:
A variety of general communication signals can be carried out with protocol identification and parsing, and there is independent learning ability, be adapted to future
The novel short-wave signal occurred.
In short, the present invention realizes a kind of large aperture Two-dimensional Short Wave direction-finding system, it is applicable to communication countermeasure, radio prison
The application fields such as survey, spectrum management.Its reliable performance has stronger application value.
Claims (3)
1. a kind of large aperture Two-dimensional Short Wave direction-finding system, which is characterized in that including antenna array, narrowband direction-finding system, broadband direction finding
System, and monitoring and Signal Analysis System；
The antenna array include an array aperture be 340 meters outer layer circle battle array, an array aperture be 120 meters internal layer circle battle array
And the center array element positioned at array the center point, outer layer, which is justified, has been respectively uniformly distributed 36 array elements in battle array and internal layer circle battle array；
The narrowband direction-finding system includes narrowband direction-finder antenna switch, short wave channel unit and narrowband direction finding processing unit；Institute
It states and contains calibration source inside narrowband direction-finder antenna switch, for realizing calibration letter under the control of narrowband direction finding processing unit
Number, the switching of outer layer aerial signal and internal layer aerial signal；The short wave channel unit for radiofrequency signal is preselected,
Frequency conversion, filtering and amplification, and intermediate-freuqncy signal is exported to narrowband direction finding processing unit；The narrowband direction finding processing unit is used for centering
Frequency signal carries out A/D sampling, Digital Down Convert and FFT processing, and realizes the direction finding to signal and Beam synthesis；
The broadband direction-finding system includes broadband direction-finder antenna switch, short wave channel unit and broadband direction finding processing cabinet；Institute
Broadband direction-finder antenna switch is stated for generating self-correcting signal, and needs to select 36 antennas of internal layer or outer according to working frequency range
The signal of 36 antenna of layer, to realize letter needed for access band direction-finding receiver under self-correcting and two kinds of direction finding modes of direction finding
Number；The short wave channel unit for the radiofrequency signal from antenna or self-correcting source to be preselected, frequency conversion, filtering and amplification,
And frequency and amplitude are adjusted to be suitble to the IF frequency of direction finding processing cabinet sampling；Broadband direction finding processing cabinet for pair
Intermediate-freuqncy signal carries out A/D sampling, Digital Down Convert and FFT processing, and realizes the direction finding to signal and Beam synthesis；
The monitoring includes analog beam synthesis device, function subset, broadband monitoring device, narrowband monitoring with Signal Analysis System
Receiver and monitoring of software and database are handled and remote for realizing the sorting of short-wave signal fast search, analysis direction finding, storage
Journey access function；Wherein:
The analog beam synthesis device is used to carry out the synthesis of high-gain narrow beam to the continuous aerial signal of circle battle array, according to not on the same day
The received incoming wave signal of antenna continuous in normal direction is passed through the different time in the phase response of different arrival bearings by line respectively
After delay, in-phase stacking is carried out, to improve the gain of synthesis and receive the signal-to-noise ratio of signal；
The function subset is used to amplify radiofrequency signal and branch, realizes that the signals of more set broadband monitoring devices share；
The broadband monitoring device is searched for realizing spectrum monitoring, the signal of full frequency band or designated frequency band within the scope of 1 ~ 30MHz
Rope, discrete channel scanning, frequency hopping intercepting and capturing and 1024 railway digital down coversions and analog demodulator function, the conventional numerical solution on 1024 tunnels
The signal analysis and parameter measurement function of tune, the demodulating and decoding of specified protocol, 1024 tunnels；
The narrowband monitoring receiver includes digit extension and simulation extension set, wherein simulating extension set for the 12 road 1MHz from antenna
~ 30MHz signal exports the intermediate-freuqncy signal of 40.355MHz after frequency conversion, and is supplied to digital cabinet and carries out sampling processing.
2. Two-dimensional Short Wave direction-finding system in large aperture according to claim 1, which is characterized in that further include monitoring subsystem；
The monitoring subsystem includes 7 class servers and 4 operation seats, and 4 operation seats include 1 plan of operation seat
Position, 1 DF and location seat, 1 signal monitoring seat and 1 off-line analysis seat；
The plan of operation seat reports information, internally passes through for externally receiving higher level's monitoring plan, superior monitoring center
The mode of task is coordinated to stand the orderly progress of interior every monitoring business, carries out on duty, information dissemination management, generates daily paper, monthly magazine；
The DF and location seat and signal monitoring seat are used to scan for signal, intercept and capture, monitor and control is kept, and realizes to letter
Number detection, direction finding, analysis, demodulation, decoding and information source restore；
The off-line analysis seat is used to carry out signal offline inspection, demodulation, decoding, information source recovery and code stream and handles.
3. Two-dimensional Short Wave direction-finding system in large aperture according to claim 1, which is characterized in that the monitoring is analyzed with signal
Database in system has a warm standby function, the data stored in database include initial data index database, information input library,
Information processing library, information products library, information system base library, information system command and control library and information system business support library.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466783A (en) * | 2021-06-22 | 2021-10-01 | 中国电子科技集团公司第五十四研究所 | Nine passageway ultrashort wave direction finding systems of monitoring frequency channel extensible |
| CN114035149A (en) * | 2021-10-25 | 2022-02-11 | 中国电子科技集团公司第二十九研究所 | Method for improving sensitivity of interferometer direction finding system |
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