CN101986169B - Distributed passive detection system based on cellular mobile communication base station and network thereof - Google Patents
Distributed passive detection system based on cellular mobile communication base station and network thereof Download PDFInfo
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Abstract
The invention provides a distributed passive detection system based on a cellular mobile communication base station and a network thereof. The system comprises an intercept receiving unit, a communication link and a master control center, wherein the intercept receiving unit comprises an antenna unit, a radio frequency signal processing unit, a baseband signal processing unit, a synchronous time service unit and a communication service unit; and the master control unit comprises a communication service unit, a data fusion unit, a target positioning/tracking unit, a target identifying unit, an integrated display control unit, a binary search decision unit and an intercept receiving equipment managing unit. The distributed passive detection system based on the cellular mobile communication base station and the network thereof provided by the invention is easy for wide arrangement, and has wide coverage range and good destruction resistance and elusive.
Description
Technical field
The present invention relates to passive detection field, particularly a kind of distributed passive detection system based on cellular mobile communication base station and network thereof.
Background technology
In the modern high technology war that electronic interferences is day by day complicated, " four resist " (anti-interference, shoulder low-level penetration, Anti-antiradiation missile and the anti-stealthy) ability how improving radar is further the important goal of development new system radar.
Passive radar by antenna receive irradiate target from the direct wave in target emanation source and foreign radiation sources after the reflection wave that formed or the scattering wave information (comprising Doppler shift, mistiming of multistation Received signal strength and the angle of arrival etc.) of carrying, location and the tracking of target is completed after information processing, himself does not launch any radiation, so there is low probability of intercept characteristic, in modern electronic warfare, to local stealth aircraft, antiradiation missile, there is stronger advantage and viability.Owing to not having energy to cover and clutter problem, there is not detection blind area in theory.These all make passive detection equipment have geneogenous comprehensive " four resist " ability.
As shown in Figure 1, a kind of passive radar detecting strategy that current conventional detection methods provides, detectd by several and receive station and be arranged in zone of protection temporarily and form, each is detectd, and receiving stands is undertaken interconnected by interim wired or wireless communication mode, institute not easily arranges by this way on a large scale, zone of protection is limited, limited in one's ability to the detecting and tracking of target, and cannot realize unmanned.
Summary of the invention
The invention provides a kind of distributed passive detection system scheme based on cellular mobile communication base station and network thereof, be easy to layout, wide coverage, maintenance cost is low, detection reliability is high, manpower use cost is low Passive Detention System scheme to provide a kind of.
To achieve these goals, technical scheme of the present invention is:
A kind of distributed passive detection system based on cellular mobile communication base station and network thereof, it is characterized in that, comprise detecing and receive unit, communication link and main control centre, wherein, detect receipts unit described in comprise: antenna element, radiofrequency signal processing unit, baseband signal processing unit, sync identification unit and communication service unit; Described main control centre comprises: communication service unit, data fusion unit, target localization/tracking cell, object-recognition unit, synthetical display control unit, binary search decision package and detect receiving unit administrative unit;
Described antenna element, the primary recipient elevation angle is the signal in more than 30 degree directions;
Described radiofrequency signal processing unit, links with described antenna element, for the detection signal that receiving antenna unit receives, and described detection signal is generated zero intermediate frequency base band data, and sends base band data to described baseband signal processing unit;
Described sync identification unit, links with base signal processing unit, for receiving BD/GPS/GLONASS satellite-signal, and to described base signal processing unit transmission time information and PPS signal;
Described baseband signal processing unit, link with radiofrequency signal unit and sync identification unit, the base band data sent for received RF unit and the temporal information of sync identification unit and PPS, temporal information is given to base band data according to PPS, and direct signal and multipath signal suppression are carried out to described base band data, finally carry out the information extraction such as target echo TOA, FOA, DOA, AOA;
Wherein, this is detectd receipts unit and also comprises: RS-232 interface, USB interface and Ethernet interface, for completing the transmission of described information.
Wherein, this detect receive unit also comprise: modulus processing unit, is arranged in described radiofrequency signal processing unit, carries out analog to digital conversion for the signal received by described antenna.
Wherein, this is detectd receipts unit and also comprises: DDR RAM interface, for connect DDR RAM and baseband signal processing unit with for being connected DDR RAM and communication service unit, the former is for being saved in DDR RAM by the data buffer storage of described baseband processing unit to DDR RAM with by the volatile data of described baseband processing unit, and the Master Control Center information cache that the latter is used for described communication service unit to receive is to DDRRAM.
Wherein, this is detectd receipts unit and also comprises: FLASH ROM interface, for connect FLASH ROM and baseband processing unit with for being connected FLASH ROM and communication service unit, the former is for being saved in FLASH ROM by the Nonvolatile data of described baseband processing unit, and the latter is used for the Nonvolatile data of described communication service unit to be saved in FLASH ROM.
Wherein, described baseband processing unit is also provided with: jtag interface, LED interface, 3uMAC/PHY interface, PROM configuration interface and hardware user DIP translation interface.
Described this is detectd receipts element characteristic and is also comprised: be arranged near cellular communication base stations or set up with cellular mobile communication base station co-sited, uses described antenna element to detect and receives cellular unit overhead target echo, and by base station E1 interface core network access.
Described communication service unit, for detecing the communication of receiving unit and main control centre, complete detect receipts unit measurement data report the biography down with main control centre information;
Described communication link, by mobile communication base station controller access E1 interface, detects the physical link link receiving unit and described main control centre described in providing, realize detecing the interconnected of receipts unit and Master Control Center, for information transmission;
Described data fusion unit, receives the station screening of uploading data, optimum combination for completing to detect more, and transmits the data after screening combination to target localization unit;
Described target localization/tracking cell, receives data fusion cell data, completes target location and resolve, target following, and sends target position information to Target track displaying unit, target position information is delivered to object-recognition unit simultaneously;
Described object-recognition unit, for completing target identification, and sends target classification information to row Target track displaying unit;
Described synthetical display control unit, the target position information of receiving target location/tracking cell and the target classification information of object-recognition unit, and complete the Target track displaying of target.
Described binary search decision package, receives the target information of location/tracking cell and the command information of synthetical display control unit, and decision-making also completes binary search information and issues.
Describedly detect receiving unit administrative unit, receive the equipment condition information of respectively detecing and receiving unit, and complete each and detect the control and management receiving unit.
A kind of method of base band signal process is applied in baseband processing unit, and described baseband processing unit comprises: direct signal suppresses unit, two-dimensional correlation processing unit, target echo information extraction unit; The method comprising the steps of:
Direct signal suppress unit according to detect to collect mail number in strong direct signal carry out self-adaptation and to go directly signal suppressing, and send the base band data after suppression direct signal to two-dimensional correlation processing unit;
Two-dimensional correlation processing unit carries out time-frequency two-dimensional cross-correlation calculation according to the base band data after described suppression direct signal, and result of calculation is sent to target echo information extraction unit;
Target echo information extraction unit extracts target information according to described result of calculation.
The method of location/tracking is applied in target localization/tracking cell, and described target localization/tracking cell comprises: single station AOA/TOA positioning unit, multistation AOA/TDOA positioning unit; The method comprising the steps of:
Location/tracking cell receives the measurement data that data fusion unit is sent here, if measurement data only receives unit from same detecing, start single station AOA/TOA positioning unit, if measurement data comprises receive unit from multiple detecing, start multistation AOA/TDOA positioning unit.
The method of binary search is applied in main control centre and each detects a receipts unit, and the method comprising the steps of:
Detect receipts unit and extract possible target information, upload Master Control Center;
Master Control Center is received the above-mentioned target information uploaded of unit merge multiple being detectd, as met target localization condition, the then information such as calculated target positions, speed, and to observing that all receipts unit of detecing of this target issue binary search information, packets of information contains the current information such as position, speed of target; As discontented foot-eye determination condition, then according to above-mentioned information, the authenticity of target to be determined, significance level are assessed, making whether issuing binary search information according to assessment result, containing the information such as the region, target location of estimation, the target velocity scope of estimation as needed then binary search packets of information;
Detect and receive unit according to Master Control Center binary search information, focussing search target may region.
As can be seen from technique scheme, distributed passive detection system based on cellular mobile communication base station and network thereof provided by the invention, unit receiving target information is received by being distributed in respectively detecing of cellular mobile communication base station, mobile communication core network is utilized to transmit detection information, finally settle accounts respectively detecing receipts unit information upload at Master Control Center, complete target localization, target following, target identification, therefore this detection system is a kind of based on cellular mobile communication base station, distributed Passive Detention System; Native system make full use of existing civilian installation have arrange easily, overlay area is wide, maintenance cost is low, detect receiving unit can realize the advantages such as unmanned, human cost are low.
Accompanying drawing explanation
The passive detection embodiment schematic diagram that Fig. 1 provides for traditional passive detection mode;
The passive detection embodiment schematic diagram that Fig. 2 provides for the embodiment of the present invention;
What Fig. 3 provided for the embodiment of the present invention detects the structure principle chart receiving unit;
The logical organization schematic diagram of the Master Control Center that Fig. 4 provides for the embodiment of the present invention;
The process flow diagram of the base band signal process that Fig. 5 provides for the embodiment of the present invention;
The process flow diagram of location/tracking that Fig. 6 provides for the embodiment of the present invention;
The process flow diagram of the binary search that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Technical scheme for a better understanding of the present invention, describes embodiment provided by the invention in detail below in conjunction with accompanying drawing.
The embodiment of the present invention provides a kind of distributed passive detection system based on cellular mobile communication base station and network thereof, for passive detection.This detection system adopts and detects receiving unit distributed arrangement and detection more, and Master Control Center concentrates the mode of settling accounts, locate and following the tracks of.The structure of " distributed ", can make the whole search coverage of detection system seamless coverage to greatest extent.The mode of " center is settled accounts ", can collect the detection information detecing receiving unit being distributed in regional to greatest extent.
One of its core content is Master Control Center and the system building form detecing receiving unit distributed arrangement.Respectively detect the signal that receiving unit completes region and detect receipts, target detection.
As Fig. 2, this distributed passive detection system, what comprise some same base station erections detects receiving unit 200 and Master Control Center 201.Wherein, as shown in Figure 3, detect receipts unit main 200 described in comprise: antenna element 300, radiofrequency signal processing unit 301, GPS/GLONASS/BD2 receiving antenna 302, sync identification unit 303, baseband signal processing unit 304, communication service unit 305 etc.; Wherein, as shown in Figure 4, described Master Control Center 201 comprises: communication service unit 401, data fusion unit 402, location/tracking cell 403, object-recognition unit 404, synthetical display control unit 405, binary search decision package 406 and detect receiving unit administrative unit 407.
Radiofrequency signal processing unit 301 receives the CDMA signal received from antenna element 300, simultaneously these signal frequency conversions to intermediate frequency, again intermediate-freuqncy signal is carried out analog to digital conversion, digital signal after analog to digital conversion is converted to base band through DDC, finally described baseband signal is sent to baseband signal processing unit 304; Sync identification unit 303 receives the GPS/GLONASS/BD2 satellite-signal received from GPS/GLONASS/BD2 receiving antenna 302, carries out PVT and resolves, pulse per second (PPS) PPS and temporal information are sent to baseband signal processing unit 304 simultaneously according to described satellite-signal; Baseband signal processing unit 304 receives described baseband signal, PPS and temporal information, after treatment detectable signal is sent to communication service unit 305.
Detecing in the further embodiment of receipts unit, this many this is detectd receipts unit and is also comprised: DDR RAM (Double Data Rate internal memory) interface 308, for connecting DDR RAM and described baseband signal processing unit 304, for the data buffer storage of described baseband signal processing unit 304 is saved in DDR RAM to DDR RAM with by the volatile data of described baseband signal processing unit 304.
Detecing in the further embodiment of receipts unit, this is detectd receipts unit and also comprises: FLASHROM (flash memory) interface 307, for connecting FLASH ROM and baseband signal processing unit 304, for the Nonvolatile data of described baseband signal processing unit 304 is saved in FLASH ROM.For writing the firmware code of corresponding baseband signal processing unit 304, prevent loss of data.
Enter to detect in the embodiment receiving unit one step, described baseband signal processing unit 304 is also provided with: JTAG (joint test working group) interface 306, LED (light emitting diode) interface, PROM (programmable memory) configuration interface and hardware user DIP (dual-in-line package) translation interface.Jtag interface, realizes hardware debug and convenient scanning configuration.PROM configuration interface, realizes the non-volatile configuration of program.This baseband signal processing unit 304 is also provided with LED interface, indicates the state of each hardware.
Enter to detect in the embodiment receiving unit one step, sync identification unit 303 also exports 10MHz clock to radiofrequency signal processing unit 301, to realize radiofrequency signal processing unit 301 clock lock.
The invention process also provides a kind of signal processing method, and be applied in baseband signal processing unit 304, described baseband processing unit comprises: direct signal suppresses unit, time-frequency two-dimensional dependent processing unit, target echo information extraction unit; As shown in Figure 5, the method comprising the steps of:
Described direct signal suppress unit 501 according to detect to collect mail number in strong direct signal carry out self-adaptation and to go directly signal suppressing, and send the base band data after suppressing direct signal to time-frequency two-dimensional dependent processing unit;
Described time-frequency two-dimensional dependent processing unit 502 carries out the mutual Fuzzy Calculation of time-frequency two-dimensional according to the base band data after described suppression direct signal, and result of calculation is sent to target echo information extraction unit;
Described target echo information extraction unit 503 extracts target information according to described result of calculation.
The invention process also provides a kind of method of location/tracking to be applied in target localization/tracking cell, and described target localization/tracking cell comprises: single station AOA/TOA positioning unit, multistation AOA/TDOA positioning unit; As described in Figure 6, the method comprising the steps of:
601: location/tracking cell receives the measurement data that data fusion unit is sent here.
602: if measurement data only receives unit from same detecing, start single station AOA/TOA positioning unit, if measurement data comprises receive unit from multiple detecing, start multistation AOA/TDOA positioning unit.
The invention process also provides a kind of method of binary search to be applied in main control centre and each detects receipts unit, and as shown in Figure 7, the method comprising the steps of:
701: detect receipts unit and extract possible target information, upload Master Control Center;
702: Master Control Center is received the above-mentioned target information uploaded of unit merge multiple being detectd, as met target localization condition, the then information such as calculated target positions, speed, and to observing that all receipts unit of detecing of this target issue binary search information, packets of information contains the current information such as position, speed of target; As discontented foot-eye determination condition, then according to above-mentioned information, the authenticity of target to be determined, significance level are assessed, making whether issuing binary search information according to assessment result, containing the information such as the region, target location of estimation, the target velocity scope of estimation as needed then binary search packets of information;
703: detect and receive unit according to Master Control Center binary search information, focussing search target may region.
Above a kind of Passive Detention System based on cellular mobile communication base station and network thereof that the embodiment of the present invention provides is described in detail, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the distributed passive detection system based on cellular mobile communication base station and network thereof, it is characterized in that, comprise detecing and receive unit, communication link and main control centre, wherein, detect receipts unit described in comprise: antenna element, radiofrequency signal processing unit, baseband signal processing unit, sync identification unit and communication service unit; Described main control centre comprises: communication service unit, data fusion unit, target localization/tracking cell, object-recognition unit, synthetical display control unit, binary search decision package and detect receiving unit administrative unit;
Described antenna element, the primary recipient elevation angle is the signal in more than 30 degree directions;
Described radiofrequency signal processing unit, links with described antenna element, for the detection signal that receiving antenna unit receives, and described detection signal is generated zero intermediate frequency base band data, and sends base band data to described baseband signal processing unit;
Described baseband signal processing unit, link with radiofrequency signal unit and sync identification unit, the base band data sent for received RF unit and the temporal information of sync identification unit and PPS, temporal information is given to base band data according to PPS, direct signal and multipath signal suppression are carried out to described base band data, and carries out target echo TOA, FOA, DOA, AOA information extraction;
Described communication service unit, for detecing the communication of receiving unit and main control centre, complete detect receipts unit measurement data report the biography down with main control centre information;
Described communication link, by mobile communication base station controller access El interface, detects the physical link link receiving unit and described main control centre described in providing, realize detecing the interconnected of receipts unit and Master Control Center, for information transmission;
Described data fusion unit, receives the station screening of uploading data, optimum combination for completing to detect more, and transmits the data after screening combination to target localization unit;
Described target localization/tracking cell, receives data fusion cell data, completes target location and resolve, target following, and sends target position information to Target track displaying unit, target position information is delivered to object-recognition unit simultaneously;
Described object-recognition unit, for completing target identification, parallel Target track displaying unit sends target classification information;
Described synthetical display control unit, the target classification information of receiving target location/tracking position of object information and object-recognition unit, and complete the Target track displaying of target;
Described binary search decision package, receives the target information of location/tracking cell and the command information of synthetical display control unit, and decision-making also completes binary search information and issues;
Describedly detect receiving unit administrative unit, receive the equipment condition information of respectively detecing and receiving unit, and complete each and detect the control and management receiving unit.
2. a kind of distributed passive detection system based on cellular mobile communication base station and network thereof as claimed in claim 1, it is characterized in that, described receipts cell layout of detecing sets up near cellular communication base stations or with cellular mobile communication base station co-sited, use described antenna element to detect and receive cellular unit overhead target echo, and by base station El interface core network access.
3. a kind of distributed passive detection system based on cellular mobile communication base station and network thereof as claimed in claim 1, it is characterized in that, described receipts unit of detecing also comprises: RS-232 interface, USB interface and Ethemet interface, for completing the transmission of described target echo TOA, FOA, DOA, AOA.
4. a kind of distributed passive detection system based on cellular mobile communication base station and network thereof as claimed in claim 1, it is characterized in that, described receipts unit of detecing also comprises: modulus processing unit, be arranged in described radiofrequency signal processing unit, carry out analog to digital conversion for the signal received by described Adaptive beamformer antenna.
5. a kind of distributed passive detection system based on cellular mobile communication base station and network thereof as claimed in claim 1, it is characterized in that, described receipts unit of detecing also comprises: DDR RAM interface, for connect DDR RAM and baseband signal processing unit with for being connected DDR RAM and communication service unit, the former is for being saved in DDRRAM by the data buffer storage of described baseband processing unit to DDR RAM with by the volatile data of described baseband processing unit, and the Master Control Center information cache that the latter is used for described communication service unit to receive is to DDR RAM.
6. a kind of distributed passive detection system based on cellular mobile communication base station and network thereof as claimed in claim 1, it is characterized in that, described receipts unit of detecing also comprises: FLASH ROM interface, for connect FLASHROM and baseband processing unit with for being connected FLASH ROM and communication service unit, the former is for being saved in FLASH ROM by the Nonvolatile data of described baseband processing unit, and the latter is used for the Nonvolatile data of described communication service unit to be saved in FLASH ROM.
7. a kind of distributed passive detection system based on cellular mobile communication base station and network thereof as claimed in claim 1, it is characterized in that, described baseband processing unit is also provided with: jtag interface, LED interface, 3uMAC/PHY interface, PROM configuration interface and hardware user DIP translation interface.
8. be applied to a twice searching methods for system described in claim 1, it is characterized in that, the method comprising the steps of:
Detect receipts unit and extract possible target information, upload Master Control Center;
Main control centre is received the above-mentioned target information uploaded of unit merge multiple being detectd, as met target localization condition, then calculate and at least comprise target location, velocity information, and to observing that all receipts unit of detecing of this target issue binary search information, information at least comprises the current position of target, velocity information; As discontented foot-eye determination condition, then according to above-mentioned information, the authenticity of target to be determined, significance level are assessed, making whether issuing binary search information according to assessment result, at least comprising the region, target location of estimation, the target velocity range information of estimation as needed then binary search information;
Detect and receive unit according to Master Control Center binary search information, focussing search target may region.
9. twice searching methods as claimed in claim 8, it is characterized in that, the method also comprises base band signal process step, this step is performed by baseband processing unit, and described baseband processing unit comprises: direct signal suppresses unit, time-frequency two-dimensional dependent processing unit, target echo information extraction unit; This step is:
Direct signal suppress unit according to detect to collect mail number in strong direct signal carry out self-adaptation and to go directly signal suppressing, and send the base band data after suppression direct signal to time-frequency two-dimensional dependent processing unit;
Time-frequency two-dimensional dependent processing unit carries out the mutual Fuzzy Calculation of time-frequency two-dimensional according to the base band data after described suppression direct signal, and result of calculation is sent to target echo information extraction unit;
Target echo information extraction unit extracts target information according to described result of calculation.
10. twice searching methods as claimed in claim 8, it is characterized in that, the method also comprises location/tracking step, and this step is performed by target localization/tracking cell, and described target localization/tracking cell comprises: single station AOA/TOA positioning unit, multistation AOA/TDOA positioning unit; This step is:
Location/tracking cell receives the measurement data that data fusion unit is sent here, if measurement data only receives unit from same detecing, start single station AOA/TOA positioning unit, if measurement data comprises receive unit from multiple detecing, start multistation AOA/TDOA positioning unit.
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| CN102608573B (en) * | 2012-03-29 | 2014-03-12 | 清华大学 | Mutual-fuzzy-accumulation passive location method based on multiple observing points |
| CN102608569B (en) * | 2012-03-29 | 2013-06-19 | 清华大学 | Space-matching passive positioning method based on double observing points |
| BR112018074384A2 (en) * | 2016-05-27 | 2019-03-12 | Rhombus Systems Group, Inc. | radar system for tracking low-flying unmanned aerial vehicles and objects |
| CN106842128B (en) * | 2017-02-11 | 2019-04-23 | 陈昭男 | The acoustics tracking and device of moving target |
| CN109001673B (en) * | 2018-05-30 | 2022-10-18 | 北京邮电大学 | Unmanned aerial vehicle detection method and base station equipment |
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| WO2020146995A1 (en) * | 2019-01-15 | 2020-07-23 | 深圳大学 | Lte-based passive radar system |
| CN111208540B (en) * | 2020-01-16 | 2020-12-11 | 西安理工大学 | Unmanned aerial vehicle detection positioning system and method |
| CN114460579B (en) * | 2022-04-12 | 2022-07-12 | 广东中科四创科技有限公司 | Method, system and storage medium for monitoring offshore ship |
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