CN110988806A - Time division multiplexing radar array surface implementation system - Google Patents
Time division multiplexing radar array surface implementation system Download PDFInfo
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- CN110988806A CN110988806A CN201911152890.7A CN201911152890A CN110988806A CN 110988806 A CN110988806 A CN 110988806A CN 201911152890 A CN201911152890 A CN 201911152890A CN 110988806 A CN110988806 A CN 110988806A
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
- G01S7/034—Duplexers
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention provides a time division multiplexing radar array surface realization system, which comprises a plurality of antenna array surfaces and a transceiving component, wherein the antenna array surfaces and the transceiving component are in switching connection through a switch array; the transceiving component comprises a transmitting component and a receiving component; the transmitting component transmits electromagnetic wave signals through the antenna array surface, and the antenna array surface transmits received echo signals to the receiving component after the electromagnetic wave signals meet the target reflection; the system mainly comprises an antenna, a switch power amplifier, a transceiving component, a frequency source, a signal processing board and the like. The device has the advantages that 4 radar antennas are placed on the radar array surface, a single radar antenna covers the 90-degree direction, the whole device can cover the 360-degree direction at a single point, and full coverage is achieved.
Description
Technical Field
The invention relates to the field of radar hardware, in particular to a time division multiplexing radar array surface implementation system.
Background
In the border-Xinjiang security radar project, on one hand, the monitoring points are positioned in the middle of a high mountain, and the terrain around the monitoring points is different, so that a mechanical scanning system cannot effectively cover the direction of 360 degrees; on the other hand, the detection capability of a small target is weak by using a mechanical scanning radar. The problem can be effectively solved by adopting a 4-plane phased array system radar (the single array surface covers 90 degrees). However, in practical application, the cost of the 4-area phased array radar is much higher than that of a mechanical scanning radar, so that the 4-area phased array radar is difficult to use in a large area.
Targets monitored by the conventional frontier defense radar monitoring scheme system are mainly people and vehicles, and the requirement on detection distance is 9km for people and 15km for vehicles. Whereas the fastest speed for a person is 2.8m/s and the speed for motorcycles (motorcycles and cars) is 23m/s (calculated as the fastest 80 km per hour).
A block diagram of a conventional frontier radar monitoring scheme system is shown in fig. 1. Each antenna array comprises 1 transmitting antenna and 1 receiving antenna, the single antenna array is connected with the transceiving component through the feeder line, then the signal is transmitted to the signal processing board for signal processing, and the processed data is transmitted to the terminal processor through the network cable. Each radar is provided with an antenna, a receiving and transmitting assembly, a signal processing board and a time sequence control board (DDS); the hardware cost is high.
Disclosure of Invention
The invention aims to provide a time division multiplexing radar array surface implementation system aiming at the defects of the prior art, and the hardware cost of the radar array surface is obviously reduced while the radar detection requirement is met.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a time division multiplexing radar array surface realization system, which comprises a plurality of antenna array surfaces and a transceiving component, wherein the antenna array surfaces and the transceiving component are in switching connection through a switch array;
the transceiving component comprises a transmitting component and a receiving component;
the transmitting component transmits electromagnetic wave signals through the antenna array surface, and after the electromagnetic wave signals meet the target reflection, the antenna array surface transmits the received echo signals to the receiving component.
And the receiving assembly transmits the echo signal to the signal processing board for signal processing, and the processed data is transmitted to the terminal processor.
Further, after the target information acquisition is completed, the switch array realizes the connection and disconnection between the transceiving component and the antenna array surface through a control signal, and simultaneously starts the connection between the next antenna array surface and the transceiving component.
Further, the number of the antenna arrays is two or three or four.
Further, the radar system shares a frequency source, the transceiver component and a signal processing system.
Furthermore, in a radar working interval, the signal processing board generates a radar digital waveform according to specific parameters, and the radar digital waveform enters the transceiving component after being converted by the D/A module.
Furthermore, after the receiving and sending component carries out filtering, frequency mixing and power amplification processing, signals are sent to the antenna array surface through the switch array, the antenna array surface transmits electromagnetic wave signals, and the electromagnetic wave signals can be transmitted after meeting obstacles.
Furthermore, after the antenna array surface receives the echo, the echo enters the receiving assembly through the circulator and the amplitude limiter, and after low-noise amplification, frequency mixing, filtering and A/D conversion processing are carried out on the echo signal, the signal enters the signal processing board.
The invention has the beneficial effects that: the system mainly comprises an antenna, a switch power amplifier, a transceiving component, a frequency source, a signal processing board and the like. The device has the advantages that 4 radar antennas are placed on the radar array surface, a single radar antenna covers the 90-degree direction, and the whole device can cover the 360-degree direction at a single point to realize full coverage; and the radar array surface uses the switch array to switch the connection between the antenna array surface and the receiving and transmitting component, the system shares the frequency source, the receiving and transmitting system and the signal processing system, and uses the time division multiplexing mode to complete 4 radar processing requirements. When the radar detection requirement is met, the hardware cost of the radar array surface is obviously reduced, and the method has a great practical popularization value.
Drawings
FIG. 1 is a schematic diagram of a conventional radar monitoring system of the prior art;
FIG. 2 is a schematic diagram of a time division multiplexed radar array implementation system;
FIG. 3 is a schematic diagram of a switch array;
FIG. 4 is a schematic diagram of the transceiver module;
FIG. 5 is a schematic diagram of a signal processing flow;
FIG. 6 is a schematic diagram of system connections in the normal mode;
FIG. 7 is a schematic view of a border security system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 2 to 4, a time division multiplexing radar array implementation system includes a plurality of antenna arrays 1 and a transceiver module 3, where the plurality of antenna arrays 1 and the transceiver module 3 are switched and connected by a switch array 2;
the transceiving component 3 comprises a transmitting component and a receiving component;
the transmitting component transmits an electromagnetic wave signal through the antenna array surface 1, and after the electromagnetic wave signal meets the target reflection, the antenna array surface 1 transmits the received echo signal to the receiving component.
The receiving component transmits the echo signals to the signal processing board 4 for signal processing, and the processed data are transmitted to the terminal processor 5.
After the target information acquisition is completed, the switch array 2 realizes the connection and disconnection between the transceiving component 3 and the antenna array surface 1 through a control signal, and simultaneously starts the connection between the next antenna array surface 1 and the transceiving component 3.
The number of the antenna arrays 1 is two or three or four.
The radar system shares a frequency source, the transceiver module 3 and a signal processing system. The switch array connects the antenna array 1 to the transceiver module 3 during one time sequence.
In a radar working interval, the signal processing board 4 generates a radar digital waveform according to specific parameters, and the radar digital waveform enters the transceiving component 3 after being converted by the D/A module.
After the receiving and sending component 3 carries out filtering, frequency mixing and power amplification processing, signals are sent to the antenna array surface 1 through the switch array 2, the antenna array surface 1 transmits electromagnetic wave signals, and the electromagnetic wave signals can be transmitted after meeting obstacles.
After receiving the echo signal, the antenna array 1 enters the receiving component 3 through the circulator 102 and the limiter 301, and after low-noise amplification, frequency mixing, filtering and a/D conversion processing of the echo signal, the signal enters the signal processing board 4.
As shown in fig. 5, the signal processing flow is: firstly, converting fixed points into floating points to perform data type conversion, then sequentially performing pulse pressure, moving target detection and constant false alarm processing, finally performing data fusion, and transmitting the fused data to a terminal processor through a network cable.
Fig. 6 shows a connection diagram of the entire system in time sequence in the normal detection mode. In the first time, 2 antennas are respectively connected with a receiving and transmitting assembly by controlling a switch array, a signal processing board generates radar pulse waveforms according to specific parameters, after the radar pulse waveforms are processed by the receiving and transmitting assembly, signals are sent to corresponding transmitting antennas through the switch array, the transmitting antennas transmit electromagnetic wave signals, a receiving antenna sends reflected echo signals to the receiving and transmitting assembly through the switch array, a receiving module in the receiving and transmitting assembly processes the signals and sends the processed signals to a signal processing board for signal processing, and after the signal processing is finished, fused data are sent to a terminal processor; and then controlling the switch array, the first turn-off antenna and the third turn-off antenna to be connected with the second transceiving component, realizing the connection of the second antenna and the fourth antenna with the first transceiving component and the second transceiving component respectively, and finishing a series of processes such as signal transmission, echo signal processing, fusion data reporting and the like again. The second sending component and the fourth signal processing system can be repeatedly used in different time.
The terminal processor can define the important degree of the target according to the speed and the direction of the target, can adopt a tracking mode for the important target, flexibly open the hardware connection of the antenna in the corresponding direction according to the advancing direction of the target and continuously track the target.
As shown in fig. 7, application scenario: the border security system comprises an overhead tower 7, a radar array 8, photoelectric equipment 9, an upper computer (a terminal operation table) 6 and the like, the security system obtains azimuth and speed information of moving targets (such as people and vehicles) in a detection range by using a four-side phased array radar and reports the azimuth and speed information to the terminal operation table 6, and the terminal operation table can command the photoelectric equipment to screen the targets in detail according to the importance degree of the targets and also can continuously track the heavy targets.
In the system, the whole detection period of a single antenna array 1 can be controlled to be in the ms level, the detection period of the whole system is in the s level in four directions according to the time division multiplexing mode, and the movement is in the detectable range of the monitoring system in the time according to the fastest speed of the man-vehicle. Therefore, the system meets the actual requirements of the radar monitoring system. And compared with the conventional system, the system frame can obviously reduce the hardware cost, thereby having larger practical application value.
In the application of the practical project of the frontier security radar, the data rate requirement can be properly reduced because the monitored targets are low-speed targets; therefore, the 4-plane phased array radar can share a frequency source, a receiving and transmitting component and a signal processing system, switch arrays are used for switching different antenna array surfaces, and a time division multiplexing method is adopted for signal processing and data fusion. On the premise of meeting the monitoring requirement of the radar system, the actual hardware cost can be obviously reduced.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A time division multiplexing radar array implementation system is characterized in that: the antenna array comprises a plurality of antenna arrays (1) and a transceiving component (3), wherein the antenna arrays (1) and the transceiving component (3) are in switching connection through a switch array (2);
the transceiving component (3) comprises a transmitting component (301) and a receiving component (302);
the transmitting component transmits electromagnetic wave signals through the antenna array surface (1), and after the electromagnetic wave signals meet the target reflection, the antenna array surface (1) transmits received echo signals to the receiving component.
2. A time division multiplexed radar front implementing system according to claim 1, wherein: the receiving assembly transmits the echo signals to the signal processing board (4) for signal processing, and the processed data are transmitted to the terminal processor (5).
3. A time division multiplexed radar front implementing system according to claim 2, wherein: after target information acquisition is completed, the switch array (2) realizes connection and disconnection of the transceiving component (3) and the antenna array surface (1) through a control signal, and simultaneously starts connection of the next antenna array surface (1) and the transceiving component (3).
4. A time division multiplexed radar front implementing system according to claim 1, wherein: the number of the antenna arrays (1) is two or three or four.
5. A time division multiplexed radar front implementing system according to claim 1, wherein: the radar system shares a frequency source, the transceiver component (3) and a signal processing system.
6. A time division multiplexed radar front implementing system according to claim 1, wherein: in a radar working interval, the signal processing board (4) generates a radar digital waveform according to specific parameters, and the radar digital waveform enters the transceiving component (3) after being converted by the D/A module.
7. A time division multiplexed radar front implementing system according to claim 6, wherein: after the receiving and sending component (3) carries out filtering, frequency mixing and power amplification processing, signals are sent to the antenna array surface (1) through the switch array (2), the antenna array surface (1) transmits electromagnetic wave signals, and the electromagnetic wave signals can be transmitted after encountering obstacles.
8. A time division multiplexed radar front implementing system according to claim 6, wherein: after the antenna array surface (1) receives the echo, the echo enters the inside of the receiving component (3) through a circulator (102) and a limiter (301), and after low-noise amplification, frequency mixing, filtering and A/D conversion processing are carried out on the echo signal, the signal enters the signal processing board (4).
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| CN201911152890.7A CN110988806A (en) | 2019-11-22 | 2019-11-22 | Time division multiplexing radar array surface implementation system |
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| CN201911152890.7A CN110988806A (en) | 2019-11-22 | 2019-11-22 | Time division multiplexing radar array surface implementation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353707A (en) * | 2021-12-30 | 2022-04-15 | 郑州大学 | Multi-target deformation monitoring system and method based on switch array antenna |
| CN114706071A (en) * | 2022-03-31 | 2022-07-05 | 扬州宇安电子科技有限公司 | Radar signal reconnaissance alarm equipment based on drone platform and method thereof |
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Application publication date: 20200410 |