CN107517476B - Method, device, equipment and storage medium for positioning intermodulation fault point of antenna feed system - Google Patents
Method, device, equipment and storage medium for positioning intermodulation fault point of antenna feed system Download PDFInfo
- Publication number
- CN107517476B CN107517476B CN201710734214.5A CN201710734214A CN107517476B CN 107517476 B CN107517476 B CN 107517476B CN 201710734214 A CN201710734214 A CN 201710734214A CN 107517476 B CN107517476 B CN 107517476B
- Authority
- CN
- China
- Prior art keywords
- intermodulation
- fault point
- branch
- test
- radio frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
- H04B17/17—Detection of non-compliance or faulty performance, e.g. response deviations
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention provides a method, a device, equipment and a storage medium for positioning an intermodulation fault point of an antenna feed system. The method comprises the following steps: sending two paths of test signals, processing the test signals and outputting the processed test signals to a multi-branch tested system; the intermodulation pulse noise signals generated by the multi-branch tested system are returned and received by the receiving port, and the time difference between the test pulse signals sent by the output port and the intermodulation pulse noise signals received by the receiving port is calculated through analysis to obtain the transmission distance from the intermodulation fault point to the input port; obtaining the transmission distance from the intermodulation fault point to the output port according to the same method; because the length of each branch is fixed, the transmission distances at two ends of the intermodulation fault point are fixed, and the sum of the transmission distances measured and calculated twice corresponds to the length of the branch where the fault point is located, the position of the multi-branch intermodulation fault point is simply and efficiently judged.
Description
Technical Field
The invention relates to the technical field of antenna fault detection, in particular to a method, a device, equipment and a storage medium for positioning an intermodulation fault point of an antenna feed system.
Background
Intermodulation noise in a wireless communication antenna feeder system refers to that when two or more high-power transmission signals pass through the antenna feeder and the antenna, one or more intermodulation signals are generated due to the nonlinear characteristics of the system, and these unwanted intermodulation signals are received by a receiver of the communication system, thereby affecting the normal operation of the receiver, so these unwanted intermodulation signals are called intermodulation noise signals.
In a modern wireless communication antenna feeder system, a plurality of high-power transmitting signals are often provided, and if the quality of the antenna feeder system is poor, a plurality of intermodulation noise signals are generated, and the noise signals can influence the normal operation of a receiver of the wireless communication system, so that the communication quality is seriously reduced.
However, since the antenna feed system is complex and has an average length of hundreds of meters, it is difficult to accurately locate the fault location of the intermodulation noise generated during daily construction and maintenance. Each part is required to be removed step by step, the workload is huge, and the working efficiency is low.
In the prior art, a set of measuring system for positioning an intermodulation noise fault point of an antenna feed system is built, two paths of signals are input by utilizing a time domain reflection principle, a reflected signal reflected by the intermodulation fault point has different frequency from the two paths of input signals, and the time difference between the input signal and the reflected signal is calculated; the speed of transmission of the radio frequency signal in a certain medium is determined according to the following steps: and (5) calculating the position of a fault point generated by the intermodulation noise at the distance of 0.5 times.
However, when two or more branches of the system appear, the prior art cannot accurately measure the specific position of the fault point.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for testing the intermodulation fault points of the branches of the antenna feed system, aiming at the defect that the intermodulation fault points of the multiple branches are positioned in the prior art.
The method is realized in such a way, the first aspect of the invention provides a method for positioning an intermodulation fault point of an antenna feed system, and the method for testing the intermodulation fault point of the antenna feed system comprises the following steps:
transmitting two paths of test radio frequency pulse signals at input ports of a plurality of branch systems, and calculating a first transmission distance between an intermodulation fault point and the input ports according to the time difference between the test radio frequency pulse signals and intermodulation pulse noise signals returned from the tested system;
transmitting two paths of test radio frequency pulse signals at output ports of the plurality of branch systems, and calculating a second transmission distance between an intermodulation fault point and the output ports according to the time difference between the test radio frequency pulse signals and intermodulation pulse noise signals returned from the tested system;
and comparing the sum of the first transmission distance and the second transmission distance with the lengths of the plurality of branches to obtain the position of the intermodulation fault point.
Further, in the method for testing intermodulation fault points of the branch of the antenna feed system, the step of transmitting the test radio frequency pulse signal at the input port or the output port of the branch of the tested system comprises the following steps:
simultaneously sending two paths of test radio frequency pulse test signals by a vector network analyzer;
after two paths of radio frequency pulse test signals are respectively subjected to signal amplification through the radio frequency power amplifier, the two paths of amplified signals are combined into one path of test radio frequency pulse signal through the combiner, and the test radio frequency pulse signal is output to an input port or an output port of a branch where the tested system is located through the duplexer.
Further, in the method for testing the intermodulation fault point of the branch of the antenna feed system, the step of receiving the intermodulation pulse noise signal returned from the tested system comprises the following steps:
and (3) separating the intermodulation pulse noise signal returned from the tested system through a receiving port of the duplexer, and then entering a vector network analyzer.
Further, in the method for testing the intermodulation fault point of the branch of the antenna feed system, the step of calculating the transmission distance between the intermodulation fault point and the input port or the output port according to the time difference between the test radio frequency pulse signal and the intermodulation pulse noise signal returned from the tested system comprises the following steps:
calculating the transmission distance between the intermodulation fault point and the input port or the output port according to the following formula:
L＝0.5*(T2-T1)*C；
wherein, T1For two-way radio-frequency pulse test signal sending time, T2And L is the time for returning the intermodulation pulse noise signal, the transmission distance from the intermodulation fault point to the input port or the output port, and C is the propagation speed of the intermodulation pulse noise signal in the branch.
Further, in the method for testing the intermodulation fault point of the branch of the antenna feed system, the step of comparing the sum of the first transmission distance and the second transmission distance with the length of the branch where the tested system is located to obtain the position of the intermodulation fault point on the branch comprises the following steps:
comparing the sum of the first transmission distance and the second transmission distance with the length of each branch respectively;
and when the sum of the first transmission distance and the second transmission distance is the same as the length of one of the branches, determining that the intermodulation fault point is positioned on the branch, and determining the position of the intermodulation fault point on the branch according to the first transmission distance and the second transmission distance.
The second aspect of the present invention further provides an intermodulation fault point test and diagnosis device for an antenna feed system, including:
the test signal transmitting module is used for transmitting two paths of radio frequency pulse test signals to the input port or the output port of the multi-branch tested system;
the transmission distance testing module is used for determining the transmission distance from the intermodulation fault point to the output or input port of the multi-branch tested system according to the time difference between the transmitted radio frequency pulse signal and the received radio frequency pulse signal;
and the fault point position comparison module is used for comparing the sum of the transmission distances from the intermodulation fault point to the output or input port of the multi-branch tested system with the length of each branch and judging the position of the intermodulation fault point on the branch.
A third aspect of the present invention provides a terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to the first aspect of the present invention when executing the computer program.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, performs the steps of the method according to the first aspect of the present invention.
The invention provides a method, a device, equipment and a storage medium for positioning an intermodulation fault point of an antenna feed system, which are used for solving the problem of measuring the intermodulation fault point of a branch circuit of a multi-branch tested system in the prior art, and respectively measuring the transmission distances from an input port and an output port to the intermodulation fault point; because the length of each branch is fixed, the transmission distances at two ends of an intermodulation fault point are fixed, and the sum of the transmission distances measured and calculated twice corresponds to the length of the branch where the fault point is located, the intermodulation fault point of the multi-branch tested system is simply and efficiently positioned.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a multi-branch system under test failure point applied in the embodiment of the present invention;
fig. 2 is a flowchart of testing steps of intermodulation fault points of a branch of an antenna feed system according to an embodiment of the present invention;
fig. 3 is a schematic circuit connection diagram of a method for testing an intermodulation fault point of a branch of an antenna feed system according to embodiment 1 of the present invention;
fig. 4 is a flowchart of a method for testing an intermodulation fault point of a branch of an antenna feed system according to embodiment 1 of the present invention;
fig. 5 is a flowchart of a method for testing an intermodulation fault point of a branch of an antenna feed system according to embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of a base station antenna intermodulation fault point testing apparatus according to embodiment 3 of the present invention;
fig. 7 is a schematic structural diagram of a terminal device provided in embodiment 5 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment of the invention provides a method for positioning intermodulation fault points of an antenna feed system, which can test wireless communication antenna feed systems such as base station antennas, radio frequency cables and the like and detect specific fault points generated by intermodulation noise. The whole test system is constructed by one multi-port vector network analyzer 1, two radio frequency power amplifiers 2, a radio frequency combiner 3 and a radio frequency duplexer 4, and a multi-branch tested system (DUT)5 is tested, as shown in fig. 3. The vector network analyzer 1 is provided with a radio frequency signal source and a radio frequency signal receiver, and a test system is built without independently adding the radio frequency signal source and the radio frequency signal receiver, so that multiple purposes can be realized.
To facilitate understanding of the testing process, please refer to fig. 1, 2 and 4.
The embodiment of the invention provides a method for positioning an intermodulation fault point of an antenna feed system, which comprises the following steps:
step S10: a test RF pulse signal is transmitted at an input port In of a plurality of branches, and a first transmission distance between an intermodulation fault point M and the input port In is calculated from a time difference between the test RF pulse signal and an intermodulation pulse noise signal returned from a multi-branch system under test (DUT) 5.
In step S10, multiple branches are connected In parallel to each other, and have the same input port In and output port Out, two paths of test radio frequency pulse signals are input to the input port In, and when there is an intermodulation fault point M In the multi-branch system under test (DUT)5, the fault point returns an intermodulation pulse noise signal according to the received test radio frequency pulse signal, where the input of the test radio frequency pulse signal to the input port In may be realized by using the vector network analyzer 1, the radio frequency power amplifier 2, and the radio frequency combiner 3 to output the test radio frequency signal, specifically: and simultaneously sending two paths of radio frequency pulse test signals through the vector network analyzer 1, and recording the time for sending the two paths of radio frequency pulse test signals.
After two paths of radio frequency pulse test signals are respectively subjected to signal amplification through the radio frequency power amplifier 2, the two paths of amplified signals are combined into one path of test pulse signal through the radio frequency combiner 3, and the test pulse signal is output to the input port In of the branch where the multi-branch tested system (DUT)5 is located through the radio frequency duplexer 4.
Similarly, the intermodulation pulse noise signal returned from the multi-branch tested system (DUT)5 may be received by the vector network analyzer 1 and the radio frequency combiner 3, specifically:
intermodulation pulse noise signals generated by a multi-branch tested system (DUT)5 return to the radio frequency duplexer 4, and the intermodulation pulse noise signals pass through the radio frequency duplexer 4; separated from the receive port (RX) of the rf duplexer 4 and entered the vector network analyzer 1, the vector network analyzer 1 records the time of receiving the intermodulation pulse noise signal.
In step S10, calculating a transmission distance between the intermodulation fault point M and the input port In according to a time difference between the test rf pulse signal and the intermodulation pulse noise signal returned from the multi-branch system under test (DUT)5, includes:
calculating the transmission distance between the intermodulation fault point M and the input port In according to the following formula:
L1＝0.5×(T2-T1)×C；
wherein, T1For two-way radio-frequency pulse test signal sending time, T2To return the intermodulation impulse noise signal, L1 is the transmission distance from the intermodulation fault point M to the input port In or the output port Out, and C is the propagation speed of the intermodulation impulse noise signal In the branch.
Step S20: two paths of test radio frequency pulse signals are transmitted at an output port Out of the multiple branches, and a second transmission distance L2 from an intermodulation fault point M to the output port Out is calculated according to the time difference between the test radio frequency pulse signals and intermodulation pulse noise signals returned from a multi-branch tested system (DUT) 5.
In step S20, the time difference of the intermodulation pulse noise signals at the output port Out of the multi-branch system under test (DUT)5 is tested according to the same test method as in step S10, and a second transmission distance L2 from the intermodulation fault point M to the output port Out of the multi-branch system under test (DUT)5 is obtained.
Step S30: comparing the sum of the first transmission distance L1 and the second transmission distance L2 with the lengths of the plurality of branches, and acquiring the position of the intermodulation fault point M.
In step S30, when there is an intermodulation fault point M In the multi-branch tested system (DUT)5 on a branch, the intermodulation fault point M returns an intermodulation impulse noise signal according to the signals of the input port In and the output port Out, respectively, a branch where the intermodulation fault point M is located can be determined according to the returned intermodulation impulse noise signal, specifically, the sum of the first transmission distance L1 and the second transmission distance L2 is compared with the length of each branch, respectively, when the sum of the first transmission distance L1 and the second transmission distance L2 is the same as the length of one of the branches, the intermodulation fault point M is determined to be located In the branch, and the location of the intermodulation fault point M on the branch is determined according to the first transmission distance L1 and the second transmission distance L2.
In the testing and diagnosing method for the intermodulation fault point M of the antenna feed system provided by this embodiment, the transmission distances from the input port In and the output port Out to the intermodulation fault point M are respectively measured, because the length of each branch is fixed, the transmission distances at two ends of the intermodulation fault point M are fixed, and the sum of the transmission distances measured twice corresponds to the length of the branch where the fault point is located, so as to locate the intermodulation fault point M of the multi-branch tested system (DUT) 5; the method has simple operation steps, and can quickly position the intermodulation fault point M of the base station antenna, thereby improving the efficiency of troubleshooting.
Example 2
Before step S10, a power calibration of the rf signal output module is further included for performing a power calibration of the vector network analyzer.
In embodiment 1, it can be known from the reason of intermodulation generation that some passive devices, such as duplexers, combiners, amplifiers, etc., in the system may generate passive intermodulation by themselves, which affects the measurement accuracy. The test error of the passive intermodulation measurement system is related to the material of the measured object, the corrosion degree of the measured object, the sensitivity of the receiver and the like, and the measurement error of the system is actually estimated by using the absolute value of the difference between the intermodulation actual value and the measured value of the measured object:
where Δ δ is the actual relative error of the system measurement, PIMOAnd the PIM is the measured value of the measured object. When the difference between the intermodulation of the measuring system and the intermodulation value of the measured object is smaller, the higher the uncertainty of the measurement is, and when the intermodulation value of the measured object is close to the residual intermodulation value of the system, an obvious measuring error is generated, so that the error of the measuring system needs to be calibrated.
As shown in fig. 5, a power attenuator 6 is connected to the rear end of two output ports of the test signal of the vector network analyzer, and a power meter 7 is connected to the rear end of the power attenuator, wherein the attenuation value of the power attenuator is Δ P.
Loading power P at port 1 of vector network analyzer0Adjusting the output of the port of the vector network analyzer 1 according to the display of the power meter 7Power P, making output power P of port of vector network analyzer 1 equal to P0-△P。
After the calibration is completed, the connection loop of the port of the vector network analyzer 1 and the high-power attenuator 6 and the power meter 7 is disconnected, and then other steps of the embodiment 1 are carried out to locate the abnormal point.
In the embodiment, the output power is calibrated by using the high-power attenuator 6 and the power meter 7, so that intermodulation signal residue of the measurement system can be overcome, errors of measurement results are reduced, and the accuracy of positioning the abnormal point is improved.
Example 3
The present embodiment provides an intermodulation fault point M positioning device 50 of an antenna feed system, as shown in fig. 6, including:
a test signal transmitting module 501, configured to send two paths of radio frequency pulse test signals to an input port In or an output port Out of a multi-branch system under test (DUT) 5;
a transmission distance testing module 502, configured to determine a transmission distance from an intermodulation fault point M to an output or input port In of a multi-branch tested system (DUT)5 according to a time difference between a transmitted radio frequency pulse signal and a received radio frequency pulse signal;
and a fault point position comparison module 503, configured to compare the sum of transmission distances from the intermodulation fault point M to an output or input port In of a multi-branch tested system (DUT)5 with the lengths of the branches, and determine the position of the intermodulation fault point M on the branch.
Further, the test signal transmitting module 501 includes:
the vector network analyzer 1 is used for simultaneously sending two paths of radio frequency pulse test signals;
the radio frequency power amplifier 2 is used for amplifying the two paths of radio frequency pulse test signals respectively;
the radio frequency combiner 3 is used for combining the two amplified pulse test signals into one test radio frequency pulse signal;
and the radio frequency duplexer 4 is used for outputting one path of test radio frequency pulse signals to the input port In or the input port Out of the branch where the multi-branch tested system (DUT)5 is located.
Further, the radio frequency duplexer 4 is further configured to separate an intermodulation pulse noise signal returned from a multi-branch tested system (DUT)5 through a receiving port of the radio frequency duplexer 4, and then enter the vector network analyzer 1.
Further, the transmission distance test module 502 calculates a transmission distance from the intermodulation fault point M to the input port In or the input port Out according to a time difference between the test radio frequency pulse signal and the intermodulation pulse noise signal returned from the multi-branch tested system (DUT)5, and includes:
calculating the transmission distance from the intermodulation fault point M to the input port In or the input port Out according to the following formula:
L＝0.5×(T2-T1)×C；
wherein, T1For two-way radio-frequency pulse test signal sending time, T2In order to return the intermodulation pulse noise signal, L is the transmission distance from the intermodulation fault point M to the input port In or the input port Out, and C is the propagation speed of the intermodulation pulse noise signal In the branch.
Further, the comparing module 503 for comparing the sum of the first transmission distance and the second transmission distance with the length of the branch where the multi-branch tested system (DUT)5 is located to obtain the position of the intermodulation fault point M on the branch includes:
comparing the sum of the first transmission distance and the second transmission distance with the length of each branch respectively;
and when the sum of the first transmission distance and the second transmission distance is the same as the length of one of the branches, determining that the intermodulation fault point M is located in the branch, and determining the position of the intermodulation fault point M on the branch according to the first transmission distance and the second transmission distance.
The specific working process of the module in the terminal device may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
Example 4
The present embodiment provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the method for locating an intermodulation fault point M of an antenna feed system in the foregoing embodiments is implemented, and for avoiding repetition, details are not repeated here. Or, when being executed by the processor, the computer program implements the functions of each module/unit in the intermodulation fault point M positioning device of the antenna feeder system in the above embodiments, and is not described herein again to avoid repetition.
Example 5
Fig. 7 is a schematic diagram of the terminal device in the present embodiment. As shown in fig. 7, the terminal device 6 includes a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60. When the processor 60 executes the computer program 62, the steps of the method for locating the intermodulation fault point M in the antenna feeder system in the above embodiment, such as the steps S10, S20 and S30 shown in fig. 2, are implemented. Alternatively, when the processor 60 executes the computer program 62, the functions of the modules/units of the intermodulation fault point M locating device of the antenna feeder system in the above embodiment are implemented, such as the functions of the test signal transmitting module 501, the transmission distance test module 502, and the fault point position comparing module 503 shown in fig. 6.
Illustratively, the computer program 62 may be divided into one or more modules/units, which are stored in the memory 61 and executed by the processor 60 to implement the present invention. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 62 in the terminal device 6. For example, the computer program 62 may be partitioned into a synchronization module, a summarization module, an acquisition module, a return module (a module in a virtual device).
The terminal device 6 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 60, a memory 61. Those skilled in the art will appreciate that fig. 7 is merely an example of a terminal device 6 and does not constitute a limitation of terminal device 6 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input output devices, network access devices, buses, etc.
The Processor 60 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 61 may be an internal storage unit of the terminal device 6, such as a hard disk or a memory of the terminal device 6. The memory 61 may also be an external storage device of the terminal device 6, such as a plug-in hard disk provided on the terminal device 6, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 61 may also include both an internal storage unit of the terminal device 6 and an external storage device. The memory 61 is used for storing computer programs and other programs and data required by the terminal device. The memory 61 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A method for positioning intermodulation fault points of an antenna feed system is characterized by comprising the following steps:
transmitting two paths of test radio frequency pulse signals at input ports of a plurality of branch systems, and calculating a first transmission distance between an intermodulation fault point and the input ports according to the time difference between the test radio frequency pulse signals and intermodulation pulse noise signals returned from the tested system;
transmitting two paths of test radio frequency pulse signals at output ports of the plurality of branch systems, and calculating a second transmission distance between an intermodulation fault point and the output ports according to the time difference between the test radio frequency pulse signals and intermodulation pulse noise signals returned from the tested system;
and comparing the sum of the first transmission distance and the second transmission distance with the lengths of the plurality of branches to obtain the position of the intermodulation fault point.
2. The method for locating intermodulation fault point of an antenna feed system according to claim 1, wherein the step of transmitting the test rf pulse signal at the input port or the output port of the branch where the system under test is located comprises:
simultaneously sending two paths of test radio frequency pulse test signals by a vector network analyzer;
after two paths of radio frequency pulse test signals are respectively subjected to signal amplification through the radio frequency power amplifier, the two paths of amplified signals are combined into one path of test radio frequency pulse signal through the combiner, and the test radio frequency pulse signal is output to an input port or an output port of a branch where the tested system is located through the duplexer.
3. The method of claim 2, wherein receiving the intermodulation pulse noise signal returned from the system under test comprises:
and (3) separating the intermodulation pulse noise signal returned from the tested system through a receiving port of the duplexer, and then entering a vector network analyzer.
4. The method for locating intermodulation fault points of an antenna feed system according to any of claims 1 to 3, wherein calculating the transmission distance between an intermodulation fault point and an input port or an output port based on the time difference between the test radio frequency pulse signal and the intermodulation pulse noise signal returned from the system under test comprises:
calculating the transmission distance between the intermodulation fault point and the input port or the output port according to the following formula:
L＝0.5*(T2-T1)*C；
wherein, T1For two-way radio-frequency pulse test signal sending time, T2And L is the time for returning the intermodulation pulse noise signal, the transmission distance from the intermodulation fault point to the input port or the output port, and C is the propagation speed of the intermodulation pulse noise signal in the branch.
5. The method for locating intermodulation fault point of an antenna feed system according to claim 1, wherein comparing the sum of the first transmission distance and the second transmission distance with the length of the branch where the system under test is located to obtain the location of the intermodulation fault point on the branch comprises:
comparing the sum of the first transmission distance and the second transmission distance with the length of each branch respectively;
and when the sum of the first transmission distance and the second transmission distance is the same as the length of one of the branches, determining that the intermodulation fault point is positioned on the branch, and determining the position of the intermodulation fault point on the branch according to the first transmission distance and the second transmission distance.
6. An intermodulation fault point positioning device of an antenna feed system, comprising:
the test signal transmitting module is used for transmitting two paths of radio frequency pulse test signals to the input port or the output port of the multi-branch tested system;
the transmission distance testing module is used for determining the transmission distance from the intermodulation fault point to the output or input port of the multi-branch tested system according to the time difference between the transmitted radio frequency pulse signal and the received radio frequency pulse signal;
and the fault point position comparison module is used for comparing the sum of the transmission distances from the intermodulation fault point to the output or input port of the multi-branch tested system with the length of each branch and judging the intermodulation fault point position on the branch and the branch.
7. The antenna feed system intermodulation fault point positioning device of claim 6, wherein the test signal transmitting module comprises:
the vector network analyzer is used for simultaneously sending two paths of radio frequency pulse test signals;
the power amplifier is used for amplifying the two paths of radio frequency pulse test signals;
the combiner is used for combining the two amplified signals into a test radio frequency pulse signal;
and the duplexer is used for outputting a path of test radio frequency pulse signal to an input port or an output port of a branch where the tested system is located.
8. The intermodulation fault point locating device of claim 7, wherein the duplexer is further configured to separate the intermodulation pulse noise signal returned from the system under test into the vector network analyzer after passing through the receiving port of the duplexer.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 5 are implemented when the computer program is executed by the processor.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734214.5A CN107517476B (en) | 2017-08-24 | 2017-08-24 | Method, device, equipment and storage medium for positioning intermodulation fault point of antenna feed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734214.5A CN107517476B (en) | 2017-08-24 | 2017-08-24 | Method, device, equipment and storage medium for positioning intermodulation fault point of antenna feed system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107517476A CN107517476A (en) | 2017-12-26 |
| CN107517476B true CN107517476B (en) | 2021-03-23 |
Family
ID=60723809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710734214.5A Active CN107517476B (en) | 2017-08-24 | 2017-08-24 | Method, device, equipment and storage medium for positioning intermodulation fault point of antenna feed system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107517476B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921870B (en) * | 2019-04-04 | 2020-12-22 | 电子科技大学 | Passive intermodulation positioning method based on frequency modulated continuous wave |
| CN110166147B (en) * | 2019-05-15 | 2020-01-21 | 杭州紫光网络技术有限公司 | Base station antenna intermodulation fault positioning test system and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055523A (en) * | 2009-11-09 | 2011-05-11 | 中国移动通信集团江苏有限公司 | Method, equipment and system for diagnosing failure of passive optical network |
| CN102156139A (en) * | 2011-04-08 | 2011-08-17 | 浙江大学 | Method and system for measuring passive intermodulation generation point of microwave device by using electromagnetic wave phase |
| CN102394693A (en) * | 2011-11-01 | 2012-03-28 | 上海电信工程有限公司 | Method for accurately positioning fault points of optical cables |
| CN103684490A (en) * | 2013-12-16 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Passive intermodulation outlier quick locating method based on vector network analyzer |
| CN104360234A (en) * | 2014-11-04 | 2015-02-18 | 中国电子科技集团公司第四十一研究所 | Linear frequency hopping incoherent detecting passive intermodulation outlier locating method |
| CN103002493B (en) * | 2012-12-11 | 2015-05-27 | 华为技术有限公司 | Passive intermodulation detection method and device |
| US9210598B1 (en) * | 2013-03-14 | 2015-12-08 | Anritsu Company | Systems and methods for measuring passive intermodulation (PIM) and return loss |
-
2017
- 2017-08-24 CN CN201710734214.5A patent/CN107517476B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055523A (en) * | 2009-11-09 | 2011-05-11 | 中国移动通信集团江苏有限公司 | Method, equipment and system for diagnosing failure of passive optical network |
| CN102156139A (en) * | 2011-04-08 | 2011-08-17 | 浙江大学 | Method and system for measuring passive intermodulation generation point of microwave device by using electromagnetic wave phase |
| CN102394693A (en) * | 2011-11-01 | 2012-03-28 | 上海电信工程有限公司 | Method for accurately positioning fault points of optical cables |
| CN103002493B (en) * | 2012-12-11 | 2015-05-27 | 华为技术有限公司 | Passive intermodulation detection method and device |
| US9210598B1 (en) * | 2013-03-14 | 2015-12-08 | Anritsu Company | Systems and methods for measuring passive intermodulation (PIM) and return loss |
| CN103684490A (en) * | 2013-12-16 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Passive intermodulation outlier quick locating method based on vector network analyzer |
| CN104360234A (en) * | 2014-11-04 | 2015-02-18 | 中国电子科技集团公司第四十一研究所 | Linear frequency hopping incoherent detecting passive intermodulation outlier locating method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107517476A (en) | 2017-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9735899B2 (en) | Device and method for calibrating antenna array systems | |
| CN109444721B (en) | Method for detecting S parameter and terminal equipment | |
| CN111426940B (en) | Test system of radar chip | |
| CN101915909B (en) | Implementing method for calibrating amplitude and phase of system receiving channel | |
| CN104471881A (en) | Detecting Intermodulation In Broadband Communication Affecting Receiver Sensitivity | |
| CN102025433B (en) | Signal detection method, detection device and detection base station | |
| US9720023B2 (en) | Vector network power meter | |
| US10805015B1 (en) | Method as well as test system for testing a device under test | |
| US9541592B1 (en) | Noise parameter measurement system | |
| US20180031669A1 (en) | Methods for calibrating microwave imaging systems | |
| CN107517476B (en) | Method, device, equipment and storage medium for positioning intermodulation fault point of antenna feed system | |
| US20130317767A1 (en) | Measurement error correction method and electronic component characteristic measurement apparatus | |
| CN104880621A (en) | Self calibration passive intermodulation tester | |
| KR20120072111A (en) | Calibration method using a vector network analyser and delay time measurememt using the same | |
| CN110174634B (en) | Load traction measurement system and measurement method | |
| US10591522B2 (en) | Measurement apparatus | |
| CN103427915B (en) | A kind of radio-frequency apparatus standing-wave ratio detection in remove interference method and device | |
| CN110763977B (en) | System and method for quantitatively measuring and evaluating precision of noise test system | |
| US11598803B1 (en) | System and method for compensating for power loss due to a radio frequency (RF) signal probe mismatch in conductive signal testing | |
| US10145931B2 (en) | Tester | |
| JP2019211314A (en) | Measurement method of reflection coefficient using vector network analyzer | |
| CN107612636A (en) | Antenna for base station intermodulation fault point positioning method, device, equipment and storage medium | |
| CN109254258B (en) | Complete calibration method for multi-port S parameter testing device | |
| US10151822B2 (en) | Tester | |
| US11855707B2 (en) | System and method for measuring path loss of a conductive radio frequency (RF) test signal path |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |