CN113253190B - Method for correcting full-band amplitude of radio frequency channel of distributed system - Google Patents
Method for correcting full-band amplitude of radio frequency channel of distributed system Download PDFInfo
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- CN113253190B CN113253190B CN202110437637.7A CN202110437637A CN113253190B CN 113253190 B CN113253190 B CN 113253190B CN 202110437637 A CN202110437637 A CN 202110437637A CN 113253190 B CN113253190 B CN 113253190B
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method for correcting full-band amplitude of a radio frequency channel of a distributed system, which comprises the following steps: collecting radio frequency amplitude values in the whole temperature range of a whole machine system consisting of a plurality of scattered subsystems, and calculating and correcting a radio frequency channel by a main computer board of the whole machine system according to the radio frequency amplitude values collected by all the subsystems, so that the amplitude flatness of the whole radio frequency channel is highest, and the like; the method can obtain more flat system channel signal gain and insertion loss amplitude, provide more accurate signal amplitude value for high-precision direction finding of the system, accurately know the position information of the radiation source in a complex electromagnetic environment, improve the direction finding precision of the whole system and the like.
Description
Technical Field
The invention relates to the technical field of signal channel correction, in particular to a method for correcting full-band amplitude of a radio frequency channel of a distributed system.
Background
In the calibration of modern electronic systems, the flatness of a signal channel directly affects the accuracy of the direction finding precision of the system, and the general system calibration generates a radio frequency calibration signal through a frequency source inside the system, the signal is transmitted from the channel of the system, a radio frequency amplitude value in the system channel is obtained, and the flatness of the channel is calculated and calibrated according to the radio frequency amplitude.
However, the existing electronic systems are increasingly complex, the ambient temperature of the system is not fixed, the temperature of the system is increased during long-time operation, the amplitude of the radio frequency signal changes along with the change of the temperature, the electronic system with a large size is formed by connecting a plurality of subsystems through a long low-frequency cable and a radio frequency cable, the insertion loss of the long radio frequency cable is large (the insertion loss is larger along with the longer cable), and the radio frequency signal changes along with the change of the frequency value.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for correcting the full-band amplitude of a radio frequency channel of a distributed system, which can obtain the signal gain and the insertion loss amplitude of a flatter system channel, provide a more accurate signal amplitude value for the high-precision direction finding of the system, accurately know the position information of a radiation source in a complex electromagnetic environment, improve the direction finding precision of the whole system and the like.
The purpose of the invention is realized by the following scheme:
a method for correcting full-band amplitude of a radio frequency channel of a distributed system comprises the following steps: the whole machine system consisting of a plurality of scattered subsystems collects radio frequency amplitude values in the whole temperature range, and then a main computer board of the whole machine system calculates and corrects a radio frequency channel according to the radio frequency amplitude values collected by all the subsystems, so that the amplitude flatness of the whole radio frequency channel is highest.
In this embodiment, the requirement of improving the direction finding accuracy of the whole system can be met.
Further, comprising the steps of:
s1, independently putting each subsystem of the distributed system into a warm box, starting the whole system, and sending a temperature correction command to the subsystems;
s2, setting a temperature range, and carrying out a full temperature range test of the set temperature range delta T, wherein the temperature stays for a set time T1 every set value T1, so that the whole machine system is completely in the current environment temperature;
s3, keeping the temperature at each temperature for a set time t2, controlling the sub-system to be in a silent state by a main computer board of the whole system, starting the whole system after judging the silent set time according to a clock in the sub-system, and starting an automatic correction command of the whole system;
s4, the independent subsystem collects the working temperature and the correction value of the temperature sensor of all the modules inside through the bus and transmits the working temperature and the correction value to the register of the computer board of the subsystem through the bus for storage;
s5, randomly collecting the working temperature and the correction value of the module for many times within the set time t2 of the current heat preservation temperature, and storing all the correction value tables which are randomly collected into a register of a computer board of the subsystem;
s6, the main computer board of the whole system judges whether the set time t1 staying in the step S2 is reached or not according to the internal clock, if so, the automatic correction is suspended, and the control subsystem is in a silent state again;
s7, the main computer board of the whole system controls the temperature of the incubator to rise to the value T1 set in the step S2, and the heat preservation time T2 set in the step S3 is repeated, until all the subsystems finish temperature automatic correction, and a temperature correction table is stored in each subsystem computer board;
s8, balancing the module correction values of different channels according to the change of different module temperatures to obtain correction value balance curve values;
s9, generating a new module correction table according to the balanced curve value, and updating the module correction table of the subsystem computer board register;
s10, recording the amplitude values of all the radio frequency points of the radio frequency cables connected with the subsystems to form a table and storing the table in a main computer board of the whole system;
s11, the whole distributed system is erected and operated, the current working temperature of the modules of the subsystem is transmitted to a computer board of the subsystem through a bus at different temperatures and is compared with all temperature correction tables stored in a register, and when the working temperature of all the modules of the subsystem and the temperature value of the same correction table are close to each other in the set proportion, the temperature correction table of the subsystem is called and transmitted to a main computer board of the whole system through the bus;
s12, the main computer board of the whole system receives the correction value tables of all the subsystems, adds the correction value tables to the amplitude value of the current radio frequency point of the radio frequency cable, subtracts the minimum value of n corrected channels to obtain n correction values, wherein n is a positive integer;
s13, the numerical control attenuator in the main computer board control system of the whole machine system controls the attenuation amount according to the correction value of each channel, and the power output by the frequency source is adjusted under each temperature to achieve the maximum amplitude flatness of all frequency points in the radio frequency channel of the whole machine system, so that the corrected radio frequency channel of the whole machine system is the maximum flatness.
Further, in step S2, the temperature range Δ T is set to be between-55 degrees and +70 degrees.
Further, the set value T1 is 5 degrees; the residence time t1 was 2.5 h.
Further, in step S3, the time t2 is set to 2 h.
Further, in step S11, n is 4.
The beneficial effects of the invention include:
the invention can accurately acquire the gain amplitude and the insertion loss amplitude of the whole machine system consisting of a plurality of scattered subsystems in the whole temperature range, then the whole machine system calculates and corrects the radio frequency channel according to the gain and the insertion loss amplitude acquired by all the subsystems, can acquire the flatter signal gain and the insertion loss amplitude of the system channel, provides more accurate signal amplitude value for the high-precision direction finding of the system, can accurately know the position information of a radiation source in a complex electromagnetic environment, and improves the direction finding precision of the whole machine system.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram of a module correction value equalization with temperature variation;
FIG. 2 is a schematic diagram of the full band amplitude of the RF channels of a multi-channel system;
Detailed Description
All features disclosed in all embodiments in this specification, or all methods or process steps implicitly disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps.
As shown in fig. 1-2, a method for correcting full-band amplitude of a radio frequency channel of a distributed system includes collecting an increased radio frequency amplitude value more accurately in a whole temperature range by a whole system composed of a plurality of distributed subsystems, and calculating a corrected radio frequency channel by the whole system according to the radio frequency amplitude values collected by all the subsystems, so that the amplitude flatness of the whole radio frequency channel is the highest, thereby meeting the requirement of improving the direction-finding precision of the whole system. In this embodiment, the method specifically includes the following steps:
s1, independently putting each subsystem of the distributed system into a warm box, starting the whole system, and sending a temperature correction command to the subsystems;
s2, setting a temperature range, and carrying out a full temperature range test of the set temperature range delta T, wherein the temperature stays for a set time T1 every set value T1, so that the whole machine system is completely in the current environment temperature;
s3, keeping the temperature for a set time t2 at each temperature, controlling the subsystem by a main computer board of the whole machine system to be in a silent state, judging the silent set time according to a clock in the subsystem, starting the whole machine system, and starting an automatic correction command of the whole machine system;
s4, the independent subsystem collects the working temperature and the correction value of the temperature sensor of all the modules inside through the bus and transmits the working temperature and the correction value to the register of the computer board of the subsystem through the bus for storage; in the prior art, the temperature information of the temperature sensor of the acquisition module is not real-time and has a certain time delay; the temperature sensor of the embodiment can accurately acquire accurate temperature information and correction values at the current moment by acquiring in real time through a high-speed bus which is communicated in the system.
S5, randomly acquiring the working temperature and the correction value of the module for many times within the set time t2 of the current heat preservation temperature, and storing all the correction value tables acquired randomly into a sub-system computer board register; in the prior art, the temperature and the correction value of the acquisition module are acquired once or displayed through a display terminal, and the temperature information and the correction value of all modules at each moment cannot be frequently recorded; the purpose of this embodiment is that, after the subsystem is subjected to heat preservation at the current temperature t2 hours, all circuits in the subsystem are completely in the current ambient temperature, the most real ambient temperature is simulated, at this moment, during the time when the subsystem operates at t2, the temperature of some modules with low power consumption is reduced due to uneven heat dissipation in the subsystem, the temperature of some modules with high power consumption is also increased, and the signal gain of the internal circuits is reduced or increased due to the temperature increase or reduction of the modules, so that the radio frequency signal correction value of the modules fluctuates, and the temperature and the correction value after the subsystem is operated are randomly adopted, so that the temperature and the correction value obtained are the truest and the most accurate, and the most accurate data support is provided for the accurate channel correction of the whole system in the full temperature range.
S6, the main computer board of the whole system judges whether the set time t1 staying in the step S2 is reached or not according to the internal clock, if so, the automatic correction is suspended, and the control subsystem is in a silent state again;
s7, the main computer board of the whole system controls the temperature of the incubator to rise to the value T1 set in the step S2, and the heat preservation time T2 set in the step S3 is repeated, until all the subsystems finish temperature automatic correction, and a temperature correction table is stored in each subsystem computer board;
s8, balancing the module correction values of different channels according to the change of different module temperatures to obtain correction value balance curve values; in the prior art, a correction value table is directly called, the embodiment balances the module correction values of different channels according to the change of different module temperatures, and aims to balance the acquired temperature information and correction values, because the acquired temperature information and correction value data cannot have time intervals completely, and some time points can be leaked certainly, the defect can be overcome by using the balance processing, the temperature information and correction value data in the complete time can be obtained, and reliable data support is provided for the follow-up whole system in the complete time and the complete temperature section.
S9, generating a new module correction table according to the balanced curve value, and updating the module correction table of the subsystem computer board register;
s10, recording the amplitude values of all radio frequency points of the radio frequency cables connected with the subsystems to form a table and storing the table in a main computer board of the whole system;
s11, the whole distributed system is erected and operated, the current working temperature of the modules of the subsystem is transmitted to a computer board of the subsystem through a bus at different temperatures and is compared with all temperature correction tables stored in a register, and when the working temperature of all the modules of the subsystem and the temperature value of the same correction table are close to each other in the set proportion, the temperature correction table of the subsystem is called and transmitted to a main computer board of the whole system through the bus;
s12, the main computer board of the whole system receives the correction value tables of all the subsystems, adds the correction value tables to the amplitude value of the current radio frequency point of the radio frequency cable, subtracts the minimum value of n corrected channels to obtain n correction values, wherein n is a positive integer;
s13, the numerical control attenuator in the main computer board control system of the whole machine system controls the attenuation amount according to the correction value of each channel, and the power output by the frequency source is adjusted under each temperature to achieve the maximum amplitude flatness of all frequency points in the radio frequency channel of the whole machine system, so that the corrected radio frequency channel of the whole machine system is the maximum flatness.
As can be seen from fig. 1, the full-band amplitude values of the radio frequency channels of each set of system are different, but the variation curves of the full-band amplitude values are very close, and the amplitude values of the frequency points have differences, but the differences are not large.
The difference of radio frequency channels of each set of system is not too large, and in order to reduce the workload of production, based on the method of the invention, a plurality of sets of systems are subjected to the same test, then the attenuation values of the numerical control attenuators in the frequency source are averaged to obtain a group of numerical control attenuation codes which are equalized by the plurality of sets of systems, the numerical control attenuation codes which are formed in the whole temperature range are written into the frequency source, and the frequency source can call the numerical control attenuation codes at different temperatures to enable the amplitude flatness of the radio frequency channels which are corrected by the whole system to be the highest, so that the direction-finding precision of the whole system is improved.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
The above-described embodiments are intended to be illustrative only, and various modifications and variations such as those described in the above-described embodiments of the invention may be readily made by those skilled in the art based upon the teachings and teachings of the present invention without departing from the spirit and scope of the invention.
In addition to the foregoing examples, those skilled in the art, having the benefit of this disclosure, may derive other embodiments from the teachings of the foregoing disclosure or from modifications and variations utilizing knowledge or skill of the related art, which may be interchanged or substituted for features of various embodiments, and such modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the present invention as set forth in the following claims.
The functionality of the present invention, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium, and all or part of the steps of the method according to the embodiments of the present invention are executed in a computer device (which may be a personal computer, a server, or a network device) and corresponding software. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, or an optical disk, exist in a read-only Memory (RAM), a Random Access Memory (RAM), and the like, for performing a test or actual data in a program implementation.
Claims (5)
1. A method for correcting full-band amplitude of a radio frequency channel of a distributed system is characterized by comprising the following steps: collecting radio frequency amplitude values in the whole temperature range of a whole machine system consisting of a plurality of scattered subsystems, and calculating and correcting a radio frequency channel by a main computer board of the whole machine system according to the radio frequency amplitude values collected by all the subsystems, so that the amplitude flatness of the whole radio frequency channel is highest; the method comprises the following substeps:
s1, independently placing each subsystem of the distributed system into an incubator, starting the whole system, and sending a temperature correction command to the subsystems;
s2, setting a temperature range, and carrying out a full temperature range test of the set temperature range delta T, wherein the temperature stays for a set time T1 every set value T1, so that the whole machine system is completely in the current environment temperature;
s3, keeping the temperature at each temperature for a set time t2, controlling the sub-system to be in a silent state by a main computer board of the whole system, starting the whole system after judging the silent set time according to a clock in the sub-system, and starting an automatic correction command of the whole system;
s4, the independent subsystem collects the working temperature and the correction value of the temperature sensor of all the modules inside through the bus and transmits the working temperature and the correction value to the register of the computer board of the subsystem through the bus for storage;
s5, randomly acquiring the working temperature and the correction value of the module for many times within the set time t2 of the current heat preservation temperature, and storing all the correction value tables acquired randomly into a sub-system computer board register;
s6, the main computer board of the whole system judges whether the set time t1 staying in the step S2 is reached or not according to the internal clock, if so, the automatic correction is suspended, and the control subsystem is in a silent state again;
s7, the main computer board of the whole system controls the temperature of the incubator to rise to the value T1 set in the step S2, and the temperature is maintained for the temperature-maintaining time T2 set in the step S3, and the process is circulated until all the subsystems are automatically corrected, and a temperature correction table is stored in each subsystem computer board;
s8, balancing the module correction values of different channels according to the change of different module temperatures to obtain correction value balance curve values;
s9, generating a new module correction table according to the balanced curve value, and updating the module correction table of the subsystem computer board register;
s10, recording the amplitude values of all the radio frequency points of the radio frequency cables connected with the subsystems to form a table and storing the table in a main computer board of the whole system;
s11, the whole distributed system is erected and operated, the current working temperature of the modules of the subsystem is transmitted to a computer board of the subsystem through a bus at different temperatures and is compared with all temperature correction tables stored in a register, and when the working temperature of all the modules of the subsystem and the temperature value of the same correction table are close to each other in the set proportion, the temperature correction table of the subsystem is called and transmitted to a main computer board of the whole system through the bus;
s12, the main computer board of the whole system receives the correction value tables of all the subsystems, adds the correction value tables to the amplitude value of the current radio frequency point of the radio frequency cable, subtracts the minimum value of n corrected channels to obtain n correction values, wherein n is a positive integer;
s13, the numerical control attenuator in the main computer board control system of the whole machine system controls the attenuation according to the corrected value of each channel, and the power output by the frequency source is adjusted under each temperature to reach the highest amplitude flatness of all frequency points in the radio frequency channel of the whole machine system, so that the corrected radio frequency channel of the whole machine system is the most flat degree.
2. The method of claim 1, wherein in step S2, the temperature range Δ T is set to be between-55 degrees and +70 degrees.
3. The method according to any one of claims 1 or 2, wherein the setting T1 is 5 degrees; the residence time t1 was 2.5 h.
4. The method of claim 3, wherein in step S3, the time t2 is set to 2 h.
5. The method of claim 4, wherein n is 4.
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| CN114006663B (en) * | 2021-09-18 | 2023-07-14 | 中国电子科技集团公司第二十九研究所 | Correction method and correction system for improving correction efficiency |
| CN114070429B (en) * | 2021-10-28 | 2023-04-18 | 中国电子科技集团公司第二十九研究所 | Method for combining radio frequency internal and external correction and computer storage medium |
| CN117452308A (en) * | 2023-12-21 | 2024-01-26 | 成都世源频控技术股份有限公司 | Automatic calibration method for full-temperature power |
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