CN111505674A - Dual-mode amplification multi-path distribution system with anti-interference function and distribution method - Google Patents
Dual-mode amplification multi-path distribution system with anti-interference function and distribution method Download PDFInfo
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- CN111505674A CN111505674A CN202010442587.7A CN202010442587A CN111505674A CN 111505674 A CN111505674 A CN 111505674A CN 202010442587 A CN202010442587 A CN 202010442587A CN 111505674 A CN111505674 A CN 111505674A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/33—Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
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- Computer Networks & Wireless Communication (AREA)
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses a dual-mode amplification multi-path distribution system with an anti-interference function and a distribution method, wherein the dual-mode amplification multi-path distribution system is provided with three paths of GPS/Beidou antenna units, a detection and control unit is used for detecting the signal intensity of a first radio frequency active unit, a second radio frequency active unit and a third radio frequency active unit and controlling the switching of a radio frequency switch and a multi-path GPS/Beidou signal switching unit, and the third GPS/Beidou antenna unit is connected with an anti-interference module which can keep the GPS/Beidou signal to be uninterruptedly output when other antenna units are interfered and cannot work.
Description
Technical Field
The invention belongs to the field of mobile communication, and particularly relates to a dual-mode amplification multi-path distribution system with an anti-interference function and a distribution method.
Background
The mobile communication is an indispensable important component in current social life and also is a public technical field developed at a high speed in recent years, the GPS/Beidou as a part of communication technology application becomes an international standard, the GPS/Beidou is widely applied to navigation, measurement, communication, time service and other aspects at present, the GPS/Beidou signal carries a fixed synchronous signal, and in the field of mobile communication, the GPS/Beidou time service mainly provides a reference synchronous signal during data transmission.
With the large-scale construction and the popularization and application of the 5G network in recent years, the mobile communication business of China is rapidly developed, according to the latest official data of the Ministry of industry and belief, the total number of mobile communication base stations of China is over 600 thousands, and technologies such as CDMA, TDS, L TE, NR and the like in the field of mobile communication all utilize GPS/Beidou to provide synchronous calibration signals.
However, the existing GPS/Beidou dual-mode intelligent amplification multi-path distribution system has a great defect, and because the GPS/Beidou satellite signal is quite weak (about-160 dBW) when reaching a ground user receiver, the thermal noise of the GPS/Beidou dual-mode intelligent amplification multi-path distribution system is about 30dB lower than that of the receiver; because the GPS/Beidou antenna of the GPS/Beidou dual-mode intelligent amplification distribution system does not have an anti-interference function, equipment can not be normally used frequently under a complex electromagnetic environment or artificial interference, so that a base station loses synchronization, time service and navigation capacity, and the national civilians are seriously affected, so that the problem of anti-interference of the GPS/Beidou dual-mode intelligent amplification multi-path distribution system is urgently solved.
Disclosure of Invention
The invention aims to overcome the defects and provide a dual-mode amplification multi-path distribution system with an anti-interference function and a distribution method, which can resist interference under a complex electromagnetic environment or thought to be interference.
In order to achieve the above purpose, a dual-mode amplification multi-path distribution system with anti-interference function comprises at least one first GPS/Beidou antenna unit, at least one second GPS/Beidou antenna unit and at least one third GPS/Beidou antenna unit, wherein the first GPS/Beidou antenna unit is connected with a first radio frequency active unit, the second GPS/Beidou antenna unit is connected with a second radio frequency active unit, the third GPS/Beidou antenna unit is connected with a third radio frequency active unit, the first radio frequency active unit is connected with a first active filtering amplification unit, the second radio frequency active unit is connected with a radio frequency switch, the third radio frequency active unit is connected with an anti-interference module, the anti-interference module is connected with the radio frequency switch, the radio frequency switch is connected with a second active filtering amplification unit, the first active filtering amplification unit and the second active filtering amplification unit are both connected with a multi-path GPS/Beidou signal switching unit, the multi-channel GPS/Beidou signal switching unit is connected with the intelligent multi-channel distribution unit;
the first radio frequency active unit, the second radio frequency active unit and the third radio frequency active unit are all connected with a detection and control unit, and the detection and control unit is connected with a radio frequency switch and a multi-path GPS/Beidou signal switching unit;
the detection and control unit is used for detecting the signal intensity of the first radio frequency active unit, the second radio frequency active unit and the third radio frequency active unit and controlling the switching of the radio frequency switch and the multi-channel GPS/Beidou signal switching unit.
The anti-interference module comprises an anti-interference processing unit, the anti-interference processing unit is connected with a third radio frequency active unit and an up-conversion module, the third radio frequency active unit and the up-conversion module are both connected with a local oscillator module, and the up-conversion module is connected with a radio frequency switch.
The first radio frequency active unit, the second radio frequency active unit, the third radio frequency active unit, the anti-interference module, the radio frequency switch, the first active filtering amplification unit, the second active filtering amplification unit and the GPS/Beidou signal switching unit are powered by a first power supply and a second power supply, and the first power supply and the second power supply form a double-circuit power supply.
A distribution method of a dual-mode amplification multi-path distribution system with an anti-interference function comprises the following steps:
the method comprises the following steps that firstly, a first GPS/Beidou antenna unit, a second GPS/Beidou antenna unit and a third GPS/Beidou antenna unit continuously receive GPS/Beidou satellite signals;
secondly, the first radio frequency active unit performs low noise amplification and filtering on signals received by the first GPS/Beidou antenna unit in the first active filtering amplification unit and then sends the signals to the multi-path GPS/Beidou signal switching unit;
step three, the detection and control unit controls the multi-channel GPS/Beidou signal switching unit to preferentially select a first GPS/Beidou antenna unit passage, and multi-channel GPS/Beidou signals are output through the intelligent multi-channel distribution unit;
step four, when the detection and control unit fails to reach any one of the first GPS/Beidou antenna unit or the third GPS/Beidou antenna unit, the detection and control unit controls the multi-channel GPS/Beidou signal switching unit to switch to a channel where the second GPS/Beidou antenna unit is located;
when interference signals exist, the first GPS/Beidou antenna unit and the second GPS/Beidou antenna unit cannot work normally, the detection and control unit controls the multi-path GPS/Beidou signal switching unit to switch to the third GPS/Beidou antenna unit, signals of the third GPS/Beidou antenna unit are processed through the anti-interference module, and then are subjected to low-noise amplification and filtering through the second active filtering amplification unit and then are sent to the multi-path GPS/Beidou signal switching unit intelligent multi-path distribution unit to output multi-path GPS/Beidou signals.
The anti-interference module comprises an anti-interference processing unit, an up-conversion module and a local oscillator module, and the working method of the anti-interference module comprises the following steps:
firstly, satellite signals and interference signals enter an anti-interference processing unit after being filtered and amplified
Secondly, converting the signals into digital signals through a high-speed A/D converter in an anti-interference unit;
thirdly, sending the digital signals to an FPGA for processing:
and fourthly, the processed signals are sent to an up-conversion unit for output.
The working method of the anti-interference processing unit is as follows:
firstly, a high-speed AD converter acquires real-time data;
secondly, the acquired data are sent to an FPGA for processing, and I/Q separation is completed at the same time;
thirdly, the data after I/Q separation is stored in a first-level cache, and when the first-level cache is full of data, the rear end is informed to carry out four paths of I and Q filtering;
fourthly, storing the filtered data in a second-level cache, and after all the data are filtered, performing adaptive algorithm operation to calculate a data weighted value;
fifthly, carrying out real-time weighted output on the weighted value and the data acquired in real time, and converting the output data into an analog signal through a D/A converter;
and sixthly, restoring the analog signal into an original signal through an up-conversion module.
Compared with the prior art, the three-channel GPS/Beidou antenna unit is provided, the detection and control unit is used for detecting the signal intensity of the first radio frequency active unit, the second radio frequency active unit and the third radio frequency active unit and controlling the switching of the radio frequency switch and the multi-channel GPS/Beidou signal switching unit, the third GPS/Beidou antenna unit is connected with the anti-interference module, and the GPS/Beidou signal can be kept to be output uninterruptedly when other antenna units are interfered and cannot work.
Furthermore, the invention adopts a dual-power backup redundancy design, and can always keep the normal and effective working state of the power supply of the equipment.
The self-adaptive algorithm of the anti-interference processing unit supports two systems of GPS and Beidou, when no interference signal exists, the equipment supports seamless switching of two paths of common GPS/Beidou antennas, the GPS/Beidou signal is kept to be output uninterruptedly, when the interference signal exists, the two paths of GPS/Beidou active antennas A and the two paths of GPS/Beidou active antennas B are interfered and fail, the equipment can be automatically and seamlessly switched to the GPS/Beidou anti-interference antenna, and therefore the equipment can still keep the GPS/Beidou signal to be output uninterruptedly.
Drawings
FIG. 1 is a system diagram of the apparatus of the present invention;
FIG. 2 is a tamper resistant block diagram of the present invention;
FIG. 3 is a flowchart illustrating the operation of the anti-interference processing unit of the present invention;
wherein, 1, first GPS/big dipper antenna element, 2, second GPS/big dipper antenna element, 3, third GPS/big dipper antenna element, 4, first radio frequency active cell, 5, second radio frequency active cell, 6, third radio frequency active cell, 7, first active filtering amplification unit, 8, radio frequency switch, 9, anti-interference processing unit, 10, up-conversion module, 11, second active filtering amplification unit, 12, multichannel GPS/big dipper signal switching unit, 13, intelligent multi-channel distribution unit, 14, local oscillator module, 15, detection and control unit, 16, first power, 17, the second power.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a dual-mode amplification multi-path distribution system with anti-jamming function comprises at least one first GPS/big dipper antenna unit 1, at least one second GPS/big dipper antenna unit 2 and at least one third GPS/big dipper antenna unit 3, wherein the first GPS/big dipper antenna unit 1 is connected with a first radio frequency active unit 4, the second GPS/big dipper antenna unit 2 is connected with a second radio frequency active unit 5, the third GPS/big dipper antenna unit 3 is connected with a third radio frequency active unit 6, the first radio frequency active unit 4 is connected with a first active filtering amplification unit 7, the second radio frequency active unit 5 is connected with a radio frequency switch 8, the third radio frequency active unit 6 is connected with an anti-jamming module, the anti-jamming module is connected with a radio frequency switch 8, the radio frequency switch 8 is connected with a second active filtering amplification unit 11, the first active filtering amplification unit 7 and the second active filtering amplification unit 11 are both connected with a multi-path GPS/big dipper signal switching unit 12, the multi-channel GPS/Beidou signal switching unit 12 is connected with the intelligent multi-channel distribution unit 13.
The first radio frequency active unit 4, the second radio frequency active unit 5 and the third radio frequency active unit 6 are all connected with a detection and control unit 15, and the detection and control unit 15 is connected with a radio frequency switch 8 and a multi-channel GPS/Beidou signal switching unit 12; the detection and control unit 15 is used for detecting the signal intensity of the first radio frequency active unit 4, the second radio frequency active unit 5 and the third radio frequency active unit 6, and controlling the switching of the radio frequency switch 8 and the multi-channel GPS/Beidou signal switching unit 12.
The anti-interference module comprises an anti-interference processing unit 9, the anti-interference processing unit 9 is connected with a third radio frequency active unit 6 and an up-conversion module 10, the third radio frequency active unit 6 and the up-conversion module 10 are both connected with a local oscillation module 14, and the up-conversion module 10 is connected with a radio frequency switch 8.
The first radio frequency active unit 4, the second radio frequency active unit 5, the third radio frequency active unit 6, the anti-interference module, the radio frequency switch 8, the first active filtering amplification unit 7, the second active filtering amplification unit 11 and the GPS/Beidou signal switching unit 12 are all powered by a first power supply 16 and a second power supply 17, and the first power supply 16 and the second power supply 17 form a double-circuit power supply.
Referring to fig. 1, a distribution method of a dual-mode amplification multi-path distribution system with an anti-interference function includes the following steps:
the method comprises the following steps that firstly, a first GPS/Beidou antenna unit 1, a second GPS/Beidou antenna unit 2 and a third GPS/Beidou antenna unit 3 continuously receive GPS/Beidou satellite signals;
secondly, the first radio frequency active unit 4 performs low-noise amplification and filtering on signals received by the first GPS/Beidou antenna unit 1 in the first active filtering amplification unit 7 and then sends the signals to the multi-channel GPS/Beidou signal switching unit 12;
step three, the detection and control unit 15 controls the multi-channel GPS/Beidou signal switching unit 12 to preferentially select a first GPS/Beidou antenna unit 1 channel, and outputs multi-channel GPS/Beidou signals through the intelligent multi-channel distribution unit 13;
step four, when the detection and control unit 15 fails to reach any one of the first GPS/Beidou antenna unit 1 or the third GPS/Beidou antenna unit 3, the detection and control unit 15 controls the multi-channel GPS/Beidou signal switching unit 12 to switch to a channel where the second GPS/Beidou antenna unit 2 is located;
when an interference signal exists, the first GPS/Beidou antenna unit 1 and the second GPS/Beidou antenna unit 2 cannot work normally, the detection and control unit 15 controls the multi-channel GPS/Beidou signal switching unit 12 to switch to the third GPS/Beidou antenna unit 3, and after the signal of the third GPS/Beidou antenna unit 3 is processed by the anti-interference module, the signal is subjected to low-noise amplification and filtering by the second active filtering amplification unit 11 and then is sent to the multi-channel GPS/Beidou signal switching unit 12 intelligent multi-channel distribution unit 13 to output multi-channel GPS/Beidou signals.
Referring to fig. 2 and 3, the anti-interference module includes an anti-interference processing unit 9, an up-conversion module 10, and a local oscillation module 14, and the working method of the anti-interference module includes the following steps:
firstly, the satellite signal and the interference signal enter the anti-interference processing unit 9 after being filtered and amplified
Secondly, converting the signals into digital signals through a high-speed A/D converter in the anti-interference unit 9;
thirdly, sending the digital signals to an FPGA for processing:
fourthly, the processed signal is sent to the up-conversion unit 10 for output.
The working method of the anti-interference processing unit 9 is as follows:
firstly, a high-speed AD converter acquires real-time data;
secondly, the acquired data are sent to an FPGA for processing, and I/Q separation is completed at the same time;
thirdly, the data after I/Q separation is stored in a first-level cache, and when the first-level cache is full of data, the rear end is informed to carry out four paths of I and Q filtering;
fourthly, storing the filtered data in a second-level cache, and after all the data are filtered, performing adaptive algorithm operation to calculate a data weighted value;
fifthly, carrying out real-time weighted output on the weighted value and the data acquired in real time, and converting the output data into an analog signal through a D/A converter;
and sixthly, restoring the analog signal into an original signal through an up-conversion module.
Claims (6)
1. A dual-mode amplification multi-path distribution system with an anti-interference function is characterized by comprising at least one first GPS/Beidou antenna unit (1), at least one second GPS/Beidou antenna unit (2) and at least one third GPS/Beidou antenna unit (3), wherein the first GPS/Beidou antenna unit (1) is connected with a first radio frequency active unit (4), the second GPS/Beidou antenna unit (2) is connected with a second radio frequency active unit (5), the third GPS/Beidou antenna unit (3) is connected with a third radio frequency active unit (6), the first radio frequency active unit (4) is connected with a first active filtering amplification unit (7), the second radio frequency active unit (5) is connected with a radio frequency switch (8), the third radio frequency active unit (6) is connected with an anti-interference module, and the anti-interference module is connected with the radio frequency switch (8), the radio frequency switch (8) is connected with a second active filtering amplification unit (11), the first active filtering amplification unit (7) and the second active filtering amplification unit (11) are both connected with a multi-channel GPS/Beidou signal switching unit (12), and the multi-channel GPS/Beidou signal switching unit (12) is connected with an intelligent multi-channel distribution unit (13);
the first radio frequency active unit (4), the second radio frequency active unit (5) and the third radio frequency active unit (6) are all connected with a detection and control unit (15), and the detection and control unit (15) is connected with a radio frequency switch (8) and a multi-channel GPS/Beidou signal switching unit (12);
the detection and control unit (15) is used for detecting the signal intensity of the first radio frequency active unit (4), the second radio frequency active unit (5) and the third radio frequency active unit (6) and controlling the switching of the radio frequency switch (8) and the multi-channel GPS/Beidou signal switching unit (12).
2. The dual-mode amplification multi-path distribution system with anti-interference function according to claim 1, wherein the anti-interference module comprises an anti-interference processing unit (9), the anti-interference processing unit (9) is connected to the third rf active unit (6) and the up-conversion module (10), the third rf active unit (6) and the up-conversion module (10) are both connected to the local oscillation module (14), and the up-conversion module (10) is connected to the rf switch (8).
3. The dual-mode amplification multi-path distribution system with the anti-interference function according to claim 1, wherein the first radio frequency active unit (4), the second radio frequency active unit (5), the third radio frequency active unit (6), the anti-interference module, the radio frequency switch (8), the first active filtering amplification unit (7), the second active filtering amplification unit (11) and the GPS/beidou signal switching unit (12) are all powered by a first power supply (16) and a second power supply (17), and the first power supply (16) and the second power supply (17) form a dual-path power supply.
4. The method of claim 1 for distributing a dual-mode amplified multiple access distribution system with interference rejection capability, comprising the steps of:
the method comprises the following steps that firstly, a first GPS/Beidou antenna unit (1), a second GPS/Beidou antenna unit (2) and a third GPS/Beidou antenna unit (3) continuously receive GPS/Beidou satellite signals;
secondly, the first radio frequency active unit (4) performs low noise amplification and filtering on signals received by the first GPS/Beidou antenna unit (1) in the first active filtering amplification unit (7) and then sends the signals to the multi-path GPS/Beidou signal switching unit (12);
step three, the detection and control unit (15) controls the multi-channel GPS/Beidou signal switching unit (12) to preferentially select a first GPS/Beidou antenna unit (1) channel, and multi-channel GPS/Beidou signals are output through the intelligent multi-channel distribution unit (13);
step four, when the detection and control unit (15) fails to reach any one of the first GPS/Beidou antenna unit (1) or the third GPS/Beidou antenna unit (3), the detection and control unit (15) controls the multi-channel GPS/Beidou signal switching unit (12) to switch to a channel where the second GPS/Beidou antenna unit (2) is located;
when interference signals exist and cause that the first GPS/Beidou antenna unit (1) and the second GPS/Beidou antenna unit (2) cannot work normally, the detection and control unit (15) controls the multi-channel GPS/Beidou signal switching unit (12) to be switched to the third GPS/Beidou antenna unit (3), signals of the third GPS/Beidou antenna unit (3) are processed through the anti-interference module, then are subjected to low-noise amplification and filtering through the second active filtering amplification unit (11), and then are sent to the multi-channel GPS/Beidou signal switching unit (12) intelligent multi-channel distribution unit (13) to output multi-channel GPS/Beidou signals.
5. The distribution method of the dual-mode amplification multi-path distribution system with the anti-interference function of claim 4, wherein the anti-interference module comprises an anti-interference processing unit (9), an up-conversion module (10) and a local oscillation module (14), and the working method of the anti-interference module comprises the following steps:
firstly, the satellite signal and the interference signal enter an anti-interference processing unit (9) after being filtered and amplified
Secondly, converting the signals into digital signals through a high-speed A/D converter in an anti-interference unit (9);
thirdly, sending the digital signals to an FPGA for processing:
fourthly, the processed signals are sent to an up-conversion unit (10) for output.
6. A method for allocating a dual-mode amplified multi-path allocation system with interference rejection capability as claimed in claim 5, characterized in that the interference rejection processing unit (9) operates as follows:
firstly, a high-speed AD converter acquires real-time data;
secondly, the acquired data are sent to an FPGA for processing, and I/Q separation is completed at the same time;
thirdly, the data after I/Q separation is stored in a first-level cache, and when the first-level cache is full of data, the rear end is informed to carry out four paths of I and Q filtering;
fourthly, storing the filtered data in a second-level cache, and after all the data are filtered, performing adaptive algorithm operation to calculate a data weighted value;
fifthly, carrying out real-time weighted output on the weighted value and the data acquired in real time, and converting the output data into an analog signal through a D/A converter;
and sixthly, restoring the analog signal into an original signal through an up-conversion module.
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