CN114217263A - Multi-channel amplitude-phase consistent state detection system and method - Google Patents
Multi-channel amplitude-phase consistent state detection system and method Download PDFInfo
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- CN114217263A CN114217263A CN202111562358.XA CN202111562358A CN114217263A CN 114217263 A CN114217263 A CN 114217263A CN 202111562358 A CN202111562358 A CN 202111562358A CN 114217263 A CN114217263 A CN 114217263A
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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
- G01S3/023—Monitoring or calibrating
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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
- G01S3/28—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
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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
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
- G01S3/48—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
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Abstract
The invention has proposed a multi-channel amplitude phase is unanimous to state detection system and method, this system includes the decoding board connected with receiver, the control output terminal of the decoding board inserts the reference source, this vibration source separately, the output terminal of the reference source inserts the front end of multipath receiving through the first power divider, the output terminal of this vibration source inserts the multipath frequency conversion channel through the second power divider; each output end of the multi-path receiving front end is correspondingly connected with one path of frequency conversion channel, and each path of frequency conversion channel uniformly converts the reference signal input by the receiving front end into an intermediate frequency signal and outputs the intermediate frequency signal to a receiver; the receiver performs phase difference and amplitude measurements on the received intermediate frequency signal. The invention has the advantages of simple circuit and fine and controllable detection, can realize the detection of phase difference state information among the channels and amplitude information of each channel of the multi-channel phase measurement equipment by taking 100MHz as a step, and provides powerful guarantee for the performance detection of the multi-channel phase measurement equipment.
Description
Technical Field
The invention relates to the technical field of microwave signal measurement, in particular to a multi-channel amplitude-phase consistent state detection system and method.
Background
The interferometer direction finding technology has great significance in the field of electronic reconnaissance because of small equipment quantity and high direction finding precision, and obtains the incoming wave direction of a signal by measuring information such as the phase of the signal. Although the phase difference detection method has the advantages of equipment quantity, direction-finding precision and the like, the defect that the direction-finding precision is rapidly deteriorated after the phase drift exceeds the tolerance range exists, and therefore how to detect and judge phase difference state information among multiple channels of the interferometer direction-finding system and further determine whether the phase tolerance of the system per se exceeds the standard is particularly important for reconnaissance equipment of the interferometer direction-finding system.
Disclosure of Invention
The invention aims to provide a multi-channel amplitude-phase consistent state detection system and method, which are used for refining the indexes of amplitude consistency and phase consistency among multi-channel direction-finding channels of an interferometer direction-finding system in online detection, and further greatly improving the testability, maintainability and usability of equipment adopting the interferometer direction-finding system.
The technical solution for realizing the purpose of the invention is as follows: a multi-channel amplitude-phase consistent state detection system comprises a decoding board connected with a receiver, wherein the control output end of the decoding board is respectively connected with a reference source and a local vibration source, the output end of the reference source is connected with a multi-channel receiving front end through a first power divider, and the output end of the local vibration source is connected with a multi-channel frequency conversion channel through a second power divider; each output end of the multi-path receiving front end is correspondingly connected with one path of frequency conversion channel, and each path of frequency conversion channel uniformly converts the reference signal input by the receiving front end into an intermediate frequency signal and outputs the intermediate frequency signal to a receiver; the receiver performs phase difference and amplitude measurements on the received intermediate frequency signal.
Further, the first power divider is a 1-division n power divider, the second power divider is a 1-division m power divider, wherein n is related to the number i of the receiving front ends, n is not less than i, and n takes the value of 4, 8, 16 or 32; m is related to the number j of the frequency conversion channels, wherein m is more than or equal to j, and the value of m is 4, 8, 16 or 32; i is greater than or equal to j.
Further, the local vibration source comprises 1 sweep frequency source and 1 point frequency source, and the frequency stepping of the reference source is consistent with the frequency stepping of the sweep frequency source.
Furthermore, the detection system is used for detecting the consistent state of the L-band amplitude, the number of detection channels of the system is 6, the detection system corresponds to 6L-band receiving front ends and 6 frequency conversion channels, a reference source is an L-band, the reference source is stepped to 100MHz, and the frequency range of the reference source is consistent with the working frequency ranges of the receiving front ends and the frequency conversion channels.
A multi-channel amplitude-phase consistent state detection method is based on any one of the multi-channel amplitude-phase consistent state detection systems and comprises the following steps:
step 1, a display control operation interface starts an amplitude-phase consistency detection menu, a radio frequency F0 is set on the interface, and a radio frequency amplitude-phase consistency detection command is issued;
step 2, after receiving the command, the receiver generates a frequency conversion control code M0 according to the frequency F0, the decoding board generates a control signal according to the frequency conversion control code M0, a control reference source generates a reference signal, the reference signal is input to the multipath receiving front end after being divided by the first power divider, and the control signal is synchronously switched to a correction state by a switch of the multipath receiving front end; meanwhile, the local oscillation source is controlled to generate local oscillation signals, and the local oscillation signals are input into the multi-channel frequency conversion channel after being divided by the second power divider;
step 3, uniformly converting the reference signals input by the multi-channel receiving front end into intermediate frequency signals by the multi-channel frequency conversion channels and inputting the intermediate frequency signals to a receiver;
step 4, the receiver measures the phase difference and the amplitude of the received intermediate frequency signal and caches the measurement result;
step 5, reading a phase difference detection result under a display control operation interface to obtain a phase difference between multiple channels corresponding to the frequency F0; issuing a read amplitude detection result to obtain amplitude values of each channel corresponding to the frequency F0;
and 6, repeating the step 1 to the step 5, wherein the step 1 correspondingly modifies the set frequency F1, and the step 2 generates a control code M1, so that phase difference signals among multiple channels under different frequencies and amplitude information of each channel are obtained.
Further, the local oscillation source comprises 1 sweep frequency source and 1 point frequency source, and the frequency stepping of the reference source and the frequency stepping of the sweep frequency source are both 100 MHz.
Compared with the prior art, the invention has the following remarkable advantages: (1) the phase consistency state among the multi-path direction-finding channels and the amplitude of each channel of the interferometer direction-finding system reconnaissance system can be finely detected; (2) the method has the advantages that the real-time online detection can be realized, the detection frequency stepping can be finely controlled, and the testability, the maintainability and the usability of equipment adopting an interferometer direction-finding system are greatly improved.
Drawings
FIG. 1 is a flow chart of the multi-channel amplitude-phase consistent state detection method of the present invention.
FIG. 2 is a block diagram of the multi-channel amplitude-phase consistent state detection system of the present invention.
Fig. 3 is a block diagram of a structure of an L-band multi-channel amplitude-phase coincidence state detection system according to an embodiment of the present invention.
Detailed description of the invention
With reference to fig. 1, the system for detecting a multi-channel amplitude-phase consistent state of the present invention includes a decoding board connected to a receiver, wherein a control output end of the decoding board is respectively connected to a reference source and a local vibration source, an output end of the reference source is connected to a multi-channel receiving front end through a first power divider, and an output end of the local vibration source is connected to a multi-channel frequency conversion channel through a second power divider; each output end of the multi-path receiving front end is correspondingly connected with one path of frequency conversion channel, and each path of frequency conversion channel uniformly converts the reference signal input by the receiving front end into an intermediate frequency signal and outputs the intermediate frequency signal to a receiver; the receiver performs phase difference and amplitude measurements on the received intermediate frequency signal.
As a specific embodiment, the first power divider is a 1-divided-n power divider, and the second power divider is a 1-divided-m power divider, where n is related to the number i of receiving front ends, n is greater than or equal to i, and n takes the value of 4, 8, 16, or 32; m is related to the number j of the frequency conversion channels, wherein m is more than or equal to j, and the value of m is 4, 8, 16 or 32; i is greater than or equal to j.
As a specific embodiment, the local oscillator source includes 1 sweep source and 1 point frequency source, and the frequency step of the reference source is consistent with the frequency step of the sweep source.
As a specific embodiment, the detection system is used for detecting the consistent state of the amplitude and phase of the L-band, the number of detection channels of the system is 6, the system corresponds to 6L-band receiving front ends and 6 frequency conversion channels, the reference source is the L-band, the reference source is stepped to 100MHz, and the frequency range of the reference source is consistent with the working frequency ranges of the receiving front ends and the frequency conversion channels.
With reference to fig. 2, the present invention provides a multi-channel amplitude-phase consistent state detection method, which is based on any one of the multi-channel amplitude-phase consistent state detection systems, and comprises the following steps:
step 1, a display control operation interface starts an amplitude-phase consistency detection menu, a radio frequency F0 is set on the interface, and a radio frequency amplitude-phase consistency detection command is issued;
step 2, after receiving the command, the receiver generates a frequency conversion control code M0 according to the frequency F0, the decoding board generates a control signal according to the frequency conversion control code M0, a control reference source generates a reference signal, the reference signal is input to the multipath receiving front end after being divided by the first power divider, and the control signal is synchronously switched to a correction state by a switch of the multipath receiving front end; meanwhile, the local oscillation source is controlled to generate local oscillation signals, and the local oscillation signals are input into the multi-channel frequency conversion channel after being divided by the second power divider;
step 3, uniformly converting the reference signals input by the multi-channel receiving front end into intermediate frequency signals by the multi-channel frequency conversion channels and inputting the intermediate frequency signals to a receiver;
step 4, the receiver measures the phase difference and the amplitude of the received intermediate frequency signal and caches the measurement result;
step 5, reading a phase difference detection result under a display control operation interface to obtain a phase difference between multiple channels corresponding to the frequency F0; issuing a read amplitude detection result to obtain amplitude values of each channel corresponding to the frequency F0;
and 6, repeating the step 1 to the step 5, wherein the step 1 correspondingly modifies the set frequency F1, and the step 2 generates a control code M1, so that phase difference signals among multiple channels under different frequencies and amplitude information of each channel are obtained.
As a specific embodiment, the local oscillation source includes 1 sweep source and 1 point frequency source, and both the reference source frequency stepping and the sweep source frequency stepping are 100 MHz.
It is easily understood that according to the technical solution of the present invention, those skilled in the art can imagine various embodiments of a multi-channel amplitude-phase consistent state detection technique of the present invention without changing the essential spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
The invention will now be further described with reference to the following examples and drawings:
examples
Fig. 3 shows an L-band amplitude-phase consistent state detection system according to this embodiment, where the reconnaissance systems of different frequency bands have different corresponding reference source frequency ranges and local vibration source frequency ranges, n of the 1-minute-n power divider is related to the number i of receiving front ends, where n is greater than or equal to i, and values are generally 4, 8, and 16, and usually do not exceed 32; m of the 1-minute-m power divider is related to the number of frequency conversion channels j, wherein m is larger than or equal to j, the values are generally 4, 8 and 16 and usually do not exceed 32; in general, i ≧ j.
The number of detection channels of the system is 6, corresponding to 6L-band receiving front ends and 6 frequency conversion channels, a reference source is an L-band, the reference source is stepped to 100MHz, the frequency range of the reference source is consistent with the working frequency ranges of the receiving front ends and the frequency conversion channels, the frequency step of the reference source is consistent with the frequency step of a sweep source, and the output frequency can be set according to an operation interface; the 1-to-n power divider is correspondingly a 1-to-8 power divider, and the 1-to-m power divider is correspondingly two 1-to-8 power dividers; the local oscillation source is 1 sweep frequency source and 1 point frequency source, wherein the sweep frequency step is 100MHz, and the frequency output value is determined by the decoding output of the receiver control decoding board.
With reference to fig. 2, the L-band amplitude-phase consistent state detection system of this embodiment has the following working procedures: the method comprises the steps of setting a control interface, issuing a radio frequency correction command, generating a frequency conversion control code by a receiver according to the received command, generating a control signal by a decoding board, controlling a reference source to output a correction frequency signal set by the control interface to a multichannel receiving front end, switching a switch of the multichannel receiving front end to a detection state, simultaneously controlling a local oscillation source to output a corresponding local oscillation signal to a multichannel frequency conversion circuit, uniformly converting the reference signal by the multichannel frequency conversion circuit and outputting the reference signal to the receiver, performing phase difference measurement and amplitude measurement on multiple paths of intermediate frequency signals by the receiver and caching measurement results, reading multichannel phase differences and amplitude values of each channel on the operation interface, and finishing the detection of the amplitude phase state of the local frequency point.
The method and the corresponding detection system provided by the embodiment of the invention can realize the phase consistency state detection and the amplitude detection of each channel of the multi-direction channel of the interferometer direction-finding system. Compared with the prior art, the invention has the most remarkable advantages that: the phase difference and the amplitude value of each channel can be detected simultaneously in multiple channels, and the detected frequency step can be controlled finely.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A multi-channel amplitude-phase consistent state detection system is characterized by comprising a decoding board connected with a receiver, wherein the control output end of the decoding board is respectively connected with a reference source and a local vibration source, the output end of the reference source is connected with a multi-channel receiving front end through a first power divider, and the output end of the local vibration source is connected with a multi-channel frequency conversion channel through a second power divider; each output end of the multi-path receiving front end is correspondingly connected with one path of frequency conversion channel, and each path of frequency conversion channel uniformly converts the reference signal input by the receiving front end into an intermediate frequency signal and outputs the intermediate frequency signal to a receiver; the receiver performs phase difference and amplitude measurements on the received intermediate frequency signal.
2. The multi-channel amplitude-phase consistent state detection system as claimed in claim 1, wherein the first power divider is a 1-division n power divider, and the second power divider is a 1-division m power divider, where n is related to the number i of receiving front ends, n is greater than or equal to i, and n takes a value of 4, 8, 16 or 32; m is related to the number j of the frequency conversion channels, wherein m is more than or equal to j, and the value of m is 4, 8, 16 or 32; i is greater than or equal to j.
3. The multi-channel amplitude-phase coherent state detection system according to claim 2, wherein the local oscillator source comprises 1 swept-source and 1 point-frequency source, and the reference source frequency step is coherent with the swept-source frequency step.
4. The system of claim 3, wherein the system is configured to detect the amplitude-phase-coherent state of L-band, the number of detection channels of the system is 6, corresponding to 6L-band receiving front-ends and 6 frequency conversion channels, the reference source is L-band, the reference source is stepped by 100MHz, and the frequency range of the reference source is consistent with the operating frequency ranges of the receiving front-ends and the frequency conversion channels.
5. A multi-channel amplitude-phase consistent state detection method is based on the multi-channel amplitude-phase consistent state detection system of any one of claims 1 to 4, and comprises the following steps:
step 1, a display control operation interface starts an amplitude-phase consistency detection menu, a radio frequency F0 is set on the interface, and a radio frequency amplitude-phase consistency detection command is issued;
step 2, after receiving the command, the receiver generates a frequency conversion control code M0 according to the frequency F0, the decoding board generates a control signal according to the frequency conversion control code M0, a control reference source generates a reference signal, the reference signal is input to the multipath receiving front end after being divided by the first power divider, and the control signal is synchronously switched to a correction state by a switch of the multipath receiving front end; meanwhile, the local oscillation source is controlled to generate local oscillation signals, and the local oscillation signals are input into the multi-channel frequency conversion channel after being divided by the second power divider;
step 3, uniformly converting the reference signals input by the multi-channel receiving front end into intermediate frequency signals by the multi-channel frequency conversion channels and inputting the intermediate frequency signals to a receiver;
step 4, the receiver measures the phase difference and the amplitude of the received intermediate frequency signal and caches the measurement result;
step 5, reading a phase difference detection result under a display control operation interface to obtain a phase difference between multiple channels corresponding to the frequency F0; issuing a read amplitude detection result to obtain amplitude values of each channel corresponding to the frequency F0;
and 6, repeating the step 1 to the step 5, wherein the step 1 correspondingly modifies the set frequency F1, and the step 2 generates a control code M1, so that phase difference signals among multiple channels under different frequencies and amplitude information of each channel are obtained.
6. The method according to claim 5, wherein the local oscillator comprises 1 sweep source and 1 point source, and the reference source frequency step and the sweep source frequency step are both 100 MHz.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114866164A (en) * | 2022-06-27 | 2022-08-05 | 长沙学院 | Method and device for measuring characteristics of radio frequency channel containing frequency conversion module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114866164A (en) * | 2022-06-27 | 2022-08-05 | 长沙学院 | Method and device for measuring characteristics of radio frequency channel containing frequency conversion module |
| CN114866164B (en) * | 2022-06-27 | 2024-05-03 | 长沙学院 | Method and device for measuring characteristics of radio frequency channel with frequency conversion module |
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