CN110266402B - Channel simulator calibration method and device - Google Patents
Channel simulator calibration method and device Download PDFInfo
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- CN110266402B CN110266402B CN201910531742.XA CN201910531742A CN110266402B CN 110266402 B CN110266402 B CN 110266402B CN 201910531742 A CN201910531742 A CN 201910531742A CN 110266402 B CN110266402 B CN 110266402B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
Abstract
The embodiment of the invention discloses a method and a device for calibrating a channel simulator, wherein a plurality of different self-calibration occasions are preset, and a radio frequency port of the channel simulator is self-calibrated as long as any one occasion is reached.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for calibrating a channel simulator.
Background
The channel is a medium for information transmission in a wireless communication system and is an indispensable component in the system, and the quality of the wireless channel directly determines the communication quality. The channel simulator is composed of a radio frequency front end module, an intermediate frequency signal processing module, an internal local oscillator module and the like, and is used for constructing an external field test environment in a laboratory and testing the wireless transmission capability of communication equipment. After the channel simulator is used for a long time, the reliability of the radio frequency port of the channel simulator is reduced, and therefore, the channel simulator needs to be subjected to port calibration.
At present, the common channel simulator performs self-calibration of the port at the time of power-on, however, the reliability of the port of the channel simulator cannot be guaranteed by the calibration method. Therefore, how to improve the reliability of the channel simulator port becomes an urgent technical problem to be solved.
Disclosure of Invention
The invention aims to provide a method and a device for calibrating a channel simulator, so as to improve the reliability of a channel simulator port. The technical scheme is as follows:
a method of channel simulator calibration, comprising:
monitoring whether any one preset calibration time in a plurality of calibration times is reached;
and when any one calibration occasion is reached, starting a self-calibration function to carry out self-calibration on the radio frequency port of the channel simulator.
The method above, preferably, the plurality of calibration occasions at least include:
the temperature of the target monitoring point in the starting and running processes reaches a preset time period or meets at least two preset conditions in the running process.
In the method, preferably, the step of enabling the temperature of the target monitoring point to meet the preset condition includes:
and the temperature difference between the target monitoring point and the target monitoring point reaches a threshold value when the radio frequency port is subjected to self-calibration at the previous time.
The method preferably further includes, before starting a self-calibration function to self-calibrate the rf port of the channel simulator:
outputting a prompt that the temperature difference reaches a threshold value;
and when receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
The method preferably further includes, when a preset time period is reached during the operation, before starting a self-calibration function to self-calibrate the radio frequency port of the channel simulator, the method further includes:
outputting a prompt for reaching a preset time period;
and when receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
The above method, preferably, further comprises:
appointing a target radio frequency transmitting port and a target radio frequency receiving port; the target radio frequency transmitting port and the target radio frequency receiving port are connected through a coaxial cable;
acquiring content to be calibrated and parameters to be configured; the contents requiring calibration include: power and/or time delay, and radio frequency points; the parameters to be configured comprise: the transmitting power of a target radio frequency transmitting port;
at each radio frequency point: transmitting corresponding signals through the target radio frequency transmitting port according to the configured parameters; receiving and detecting the power and time delay of a signal at the target radio frequency receiving port; and calculating a line loss compensation value of the coaxial cable corresponding to the radio frequency point according to the power and the time delay so as to calibrate the line loss of the target radio frequency transmitting port and/or the target radio frequency receiving port at the radio frequency point.
In the above method, preferably, when line loss calibration needs to be performed on at least two rf transmitting ports, for each of the at least two rf transmitting ports, the rf transmitting port is designated as a target rf transmitting port, and the target rf transmitting port and the target rf receiving port are connected by a coaxial cable.
In the above method, preferably, when line loss calibration needs to be performed on at least two rf receiving ports, for each of the at least two rf receiving ports, the rf receiving port is designated as a target rf receiving port, and the target rf receiving port and the target rf transmitting port are connected by a coaxial cable.
A channel simulator calibration apparatus comprising:
the monitoring module is used for monitoring whether any one preset calibration time in a plurality of calibration times is reached;
and the first calibration module is used for starting a self-calibration function to perform self-calibration on the radio frequency port of the channel simulator when any one calibration occasion is reached.
The above apparatus, preferably, further comprises:
the second calibration module is used for appointing a target radio frequency transmitting port and a target radio frequency receiving port; the target radio frequency transmitting port and the target radio frequency receiving port are connected through a coaxial cable; acquiring content to be calibrated and parameters to be configured; the contents requiring calibration include: power and/or time delay, and radio frequency points; the parameters to be configured comprise: the transmitting power of a target radio frequency transmitting port; at each radio frequency point: transmitting corresponding signals through the target radio frequency transmitting port according to the configured parameters; receiving and detecting the power and time delay of a signal at the target radio frequency receiving port; and calculating a line loss compensation value of the coaxial cable corresponding to the radio frequency point according to the power and the time delay so as to calibrate the line loss of the target radio frequency transmitting port and/or the target radio frequency receiving port at the radio frequency point.
According to the scheme, the channel simulator calibration method and the channel simulator calibration device provided by the invention have the advantages that a plurality of different self-calibration occasions are preset, the radio frequency port of the channel simulator is subjected to self-calibration as long as any one occasion is reached, compared with the prior art in which the self-calibration is carried out under only one condition, the self-calibration triggering condition is increased, and the reliability of the channel simulator port is improved.
Drawings
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 description of the embodiments or 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 flowchart of an implementation of a calibration method for a channel simulator according to an embodiment of the present invention;
fig. 2 is an exemplary diagram of an interface of an upper computer performing self-calibration configuration on a designated port according to an embodiment of the present invention;
fig. 3 is an exemplary diagram of an interface of an upper computer when performing line loss calibration on a designated port according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a calibration apparatus for a channel simulator according to an embodiment of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated herein.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The channel simulator calibration method and device provided by the invention are applied to the channel simulator.
Referring to fig. 1, fig. 1 is a flowchart of an implementation of a calibration method for a channel simulator according to an embodiment of the present invention, which may include:
step S11: monitoring whether any one of a plurality of preset calibration occasions is reached. If so, go to step S12, otherwise, go to step S11.
In the embodiment of the invention, a plurality of different calibration occasions are preset, and the plurality of different calibration occasions can be determined according to factors influencing the reliability of the port of the channel simulator. The inventor researches and discovers that the factors influencing the reliability of the port of the channel simulator at least comprise the following factors: channel simulator runtime, and the temperature of the board in the channel simulator. The board card is a main module for signal processing in the channel simulator, and is generally formed by integrally packaging a plurality of circuit boards together.
The plurality of calibration occasions may include a channel simulator being powered on. The invention can self-calibrate the radio frequency port of the channel simulator under other conditions besides self-calibrating the radio frequency port of the channel simulator when starting up.
Step S12: a self-calibration function is initiated to self-calibrate the radio frequency port of the channel simulator.
The self-calibration function may be initiated by calling a calibration function. After the self-calibration function is started, the channel simulator can automatically perform self-calibration on all the radio frequency ports in sequence. Generally, all the transmitting ports are traversed first, calibration is performed on each transmitting port in sequence, then all the receiving ports are traversed, and calibration is performed on each receiving port in sequence, wherein the time required for calibration of each port is about 40 s.
The channel simulator calibration method with the function of the invention presets a plurality of different self-calibration occasions, and carries out self-calibration on the radio frequency port of the channel simulator as long as any one occasion is reached.
In an alternative embodiment, the calibration timings may include at least two of the following:
and starting the computer. That is, the channel simulator self-calibrates each time it is turned on.
The preset time period is reached in the operation process. Namely, after the channel simulator starts to operate, the channel simulator is self-calibrated once every certain time period.
The temperature of the target monitoring point in the operation process meets the preset condition. Namely, after the channel simulator starts to operate, the temperature of a target monitoring point is monitored, and when the temperature of the monitoring point meets a preset condition, a self-calibration function is started.
The calibration occasions are independent and do not influence each other.
In an alternative embodiment, the step of the target monitoring point satisfying the preset condition may include:
the temperature difference between the target monitoring point and the target monitoring point during the previous radio frequency port self-calibration reaches a threshold value. Alternatively, the threshold may be 5 ℃, although the threshold may be set to other values, and may be determined empirically by the user.
The last self-calibration of the radio frequency port is not the self-calibration of the radio frequency port when the temperature of the previous target monitoring point meets the preset condition, but the last self-calibration of the radio frequency port, which may be the self-calibration of the radio frequency port when the channel simulator is started, the self-calibration of the radio frequency port when the preset time period is reached, or the self-calibration of the radio frequency port when the temperature of the target monitoring point meets the preset condition.
Fig. 2 is a diagram illustrating an example of an upper computer interface for performing self-calibration configuration on a designated port according to an embodiment of the present invention. The interface can be invoked by clicking a preset "self-calibrating" virtual key. In this example, the user may set a time period for self-calibration according to a preset time period, in this example, 60min, or may set a threshold for self-calibration according to temperature, in this example, 10 ℃. The user can also select a radio frequency interface to be calibrated (namely a channel in the figure, wherein one channel corresponds to one radio frequency transmitting interface and one radio frequency receiving port), after the parameters are set, the user clicks 'determination', namely configuration is completed, then in the operation process of the channel simulator, the time period is prompted to be reached every 60 minutes, and when the real-time temperature of a monitoring point and the temperature difference of the monitoring point in the previous calibration are higher than 10 ℃, the temperature difference threshold is prompted, so that the user can determine whether to start the self-calibration function according to the prompt.
In an optional embodiment, when the temperature of the target monitoring point satisfies a preset condition, before starting the self-calibration function to self-calibrate the radio frequency port of the channel simulator, the method may further include:
and outputting a prompt of reaching a preset time period. The prompt may be output in a text manner or in a voice manner. Alternatively, the prompt is output in text or voice at the same time. Or by illumination of a light of a first predetermined color. Alternatively, the prompt is characterized by a first predetermined color light flashing in a first manner.
When receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
The instruction for starting the port self-calibration function can be triggered by a user through operating a preset physical key, or triggered by operating a preset virtual key on a preset operation interface by the user, or output a selection key for selecting whether to trigger the instruction for starting the port self-calibration function on a prompt interface, and when the user selects yes, trigger to generate the instruction for starting the port self-calibration function.
In the embodiment of the invention, when the temperature of the target monitoring point meets the preset condition, the self-calibration function is not directly started, but is started when an instruction for starting the port self-calibration function, which is triggered by a user, is received. And the influence on the normal operation of the channel simulator caused by direct starting is avoided.
In an optional embodiment, when a preset time period is reached during the operation, before starting the self-calibration function to self-calibrate the radio frequency port of the channel simulator, the method may further include:
and outputting a prompt of reaching a preset time period. The prompt may be output in a text manner or in a voice manner. Alternatively, the prompt is output in text or voice at the same time. Or by illuminating a light of a second predetermined color. Alternatively, the prompt is characterized by a second predetermined color light flashing in a second manner.
When receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
The instruction for starting the port self-calibration function can be triggered by a user through operating a preset physical key, or triggered by operating a preset virtual key on a preset operation interface by the user, or output a selection key for selecting whether to trigger the instruction for starting the port self-calibration function on a prompt interface, and when the user selects yes, trigger to generate the instruction for starting the port self-calibration function.
In the embodiment of the invention, when the preset time period is reached in the operation process, the self-calibration function is not directly started, but is started when an instruction for starting the port self-calibration function, which is triggered by a user, is received. And the influence on the normal operation of the channel simulator caused by direct starting is avoided.
In an optional embodiment, the calibration method of the channel simulator provided by the present invention may further include:
after the self-calibration is completed, outputting a calibration result to a system log, where the calibration result may include: calibration opportunity, calibration time, and radio frequency port. So that the user can view the calibration history data at any time.
In addition, after the self-calibration is completed, if the self-calibration is successful, prompt information of the completion of the self-calibration is output, and if errors occur in the self-calibration process, prompt information of calibration failure is output.
The inventor of the present invention has found that the channel simulator is connected to a coaxial cable during actual operation, and the coaxial cable also causes loss (hereinafter referred to as line loss) to signals output or input from the ports. On the basis of this, the method is suitable for the production,
in an optional embodiment, the channel simulator provided in the present invention may perform self-calibration according to the foregoing embodiment, and may perform line loss calibration on each port, specifically including:
appointing a target radio frequency transmitting port and a target radio frequency receiving port; the target radio frequency transmitting port and the target radio frequency receiving port are connected through a coaxial cable.
When a user needs to calibrate the line loss of a certain radio frequency transmitting port A, the radio frequency transmitting port A can be designated as a target radio frequency transmitting port, a certain radio frequency receiving port B on the channel simulator can be designated as a target radio frequency receiving port, and the radio frequency transmitting port A and the radio frequency receiving port B are connected through a coaxial cable.
Acquiring content to be calibrated and parameters to be configured; the contents requiring calibration include: power and/or time delay; the parameters to be configured comprise: frequency point and emission power of target radio frequency emission port.
In this embodiment, either power consumption or time delay or both power consumption and time delay are supported. The radio frequency points can be assigned to be multiple.
When a plurality of radio frequency points are appointed, a target radio frequency transmitting port or a target radio frequency receiving port needs to be calibrated frequency point by frequency point, and corresponding signals are transmitted through the target radio frequency transmitting port under each radio frequency point according to the configured transmitting power; receiving and detecting the power and/or time delay of a signal at a target radio frequency receiving port; and calculating line loss compensation values (including power compensation values and/or phase compensation values) of the coaxial cable of the radio frequency point according to the power and/or the time delay so as to calibrate the line loss of the target radio frequency transmitting port and/or the target radio frequency receiving port at the radio frequency point. The line loss calibration comprises the following steps: power compensation and/or phase compensation. Specifically, the method comprises the following steps of determining according to the content which needs to be calibrated and is set by a user: if the user selects only power, the line loss calibration only comprises power compensation, if the user selects only time delay, the line loss calibration only comprises phase compensation, and if the user selects both power and time delay, the line loss calibration comprises both power compensation and phase compensation.
Optionally, the configured parameter may be transferred to the target rf transmitting port through a calibration function, so as to configure the parameter of the rf transmitting port.
And after completing the line loss calibration of the target radio frequency transmitting port under each radio frequency point, automatically switching the radio frequency point to the next radio frequency point in all frequency points specified by the user, and performing the line loss calibration of the target radio frequency transmitting port under the next radio frequency point according to the method until completing the line loss calibration of the target radio frequency transmitting port under all frequency points set by the user.
For each calibrated rf transmit port, calibration related data is stored in a table, including but not limited to the following data items: transmit power (dB) of the radio frequency transmit port; a power calibration value (dB) for the radio frequency transmit port; time delay (ns) of the radio frequency transmit port; a phase calibration value (dB) for the radio frequency transmit port; radio frequency output port power (dB), etc.
For each calibrated rf receive port, calibration related data is stored in a table, including but not limited to the following data items: power (dB) of the radio frequency receive port; a power offset value (dB) of the radio frequency receive port; time delay (ns) of the radio frequency receive port; a phase compensation value (dB) of the radio frequency receiving port; radio frequency transmit port power (dB), etc.
After the line loss compensation value is obtained through calculation, the line loss compensation value can be issued to an intermediate frequency FPGA of each radio frequency port, the FPGA loads the line loss compensation value, and line loss calibration is carried out on the radio frequency ports based on the line loss compensation value.
Fig. 3 is a diagram illustrating an example of an interface of an upper computer when performing line loss calibration on a designated port according to an embodiment of the present invention. The interface can be invoked by clicking a preset "multi-port calibration" virtual key. In this interface, it is possible to select whether to calibrate the rf transmission port or the rf reception port, and if it is desired to calibrate the rf transmission port, "transmission port calibration" in the drawing is selected, and if it is desired to calibrate the rf reception port, "reception port calibration" in the drawing is selected, and in this example, "transmission port calibration" is selected. After the port type is selected, it is also necessary to designate a radio frequency transmitting port and a radio frequency receiving port, IN this example, the column "transmitting port selection" designates the radio frequency transmitting port RF _ OUT1 as a target radio frequency transmitting port, and the column "receiving port selection" designates the radio frequency receiving port RF _ IN1 as a target radio frequency receiving port. In this example, two frequency points, 5MHz and 30MHz, are configured. The tester can modify the frequency point into a frequency point used in practical application according to practical application.
The lower table is used to record calibration related data. In addition, the invention also provides a calibration related data storage function, and after the calibration related data is obtained, the calibration related data can be stored to a preset path by clicking 'save' or 'save as' so as to facilitate subsequent query.
After the user connects the RF transmitting port RF _ OUT1 and the RF receiving port RF _ IN1 via the coaxial cable, if the user clicks the "calibration" button, the line loss calibration of the RF transmitting port RF _ OUT1 can be performed.
In an alternative embodiment, when the line loss calibration needs to be performed on at least two rf transmitting ports, the calibration needs to be performed on the at least two rf transmitting ports one by one. For each radio frequency transmitting port of at least two radio frequency transmitting ports, when the radio frequency transmitting port needs to be calibrated, the radio frequency transmitting port is designated as a target radio frequency transmitting port, and the target radio frequency transmitting port and the target radio frequency receiving port are connected through a coaxial cable.
That is to say, when line loss calibration needs to be performed on different rf transmitting ports, different rf transmitting ports need to be connected to the same rf receiving port through a coaxial cable. So as to eliminate the difference of the inconsistency of the radio frequency receiving end.
Similarly, when the line loss of the at least two rf receiving ports needs to be calibrated, the at least two rf receiving ports need to be calibrated one by one. For each radio frequency receiving port of the at least two radio frequency receiving ports, when the radio frequency receiving port needs to be calibrated, the radio frequency receiving port is designated as a target radio frequency receiving port, and the target radio frequency receiving port is connected with the target radio frequency transmitting port through a coaxial cable.
That is to say, when line loss calibration is performed on different rf receiving ports, different rf receiving ports need to be connected to the same rf transmitting port through a coaxial cable. So as to eliminate the difference of the inconsistency of the radio frequency transmitting ends.
Corresponding to the embodiment of the method, the invention also provides a device for calibrating the channel simulator. Fig. 4 shows a schematic structural diagram of a calibration apparatus for a channel simulator, which may include:
a monitoring module 41, configured to monitor whether any one of a plurality of preset calibration timings is reached;
and the calibration module 42 is configured to start a self-calibration function to self-calibrate the radio frequency port of the channel simulator when any one calibration occasion is reached.
The channel simulator calibration device provided by the invention is preset with a plurality of different self-calibration occasions, and the radio frequency port of the channel simulator is self-calibrated as long as any one occasion is reached.
In an alternative embodiment, the plurality of calibration occasions includes at least two of the following:
starting up;
reaching a preset time period in the operation process;
the temperature of the target monitoring point in the operation process meets the preset condition.
In an optional embodiment, when monitoring whether the temperature of the target monitoring point satisfies the preset condition, the monitoring module 41 may specifically be configured to:
and monitoring whether the temperature difference between the target monitoring point and the target monitoring point reaches a threshold value when the radio frequency port is subjected to self-calibration at the previous time. If the monitoring result is yes, determining whether the temperature of the target monitoring point meets the preset condition or not.
In an optional embodiment, the monitoring module 41 may be further configured to output a prompt that the temperature difference reaches a preset value;
the calibration module 42 may be specifically configured to: and when receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
In an optional embodiment, the monitoring module 41 may be further configured to output a prompt indicating that a preset time period is reached when the preset time period is reached in the operation process;
the calibration module 42 may be specifically configured to: and when receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
In an alternative embodiment, the channel simulator calibration apparatus may further include:
the first configuration module is used for appointing a target radio frequency transmitting port and a target radio frequency receiving port; the target radio frequency transmitting port and the target radio frequency receiving port are connected through a coaxial cable;
the second configuration module is used for acquiring the content to be calibrated and the parameters to be configured; the contents requiring calibration include: power and/or time delay, and radio frequency points; the parameters to be configured comprise: the transmitting power of a target radio frequency transmitting port;
the calibration module 42 may also be used to: at each radio frequency point: transmitting corresponding signals through the target radio frequency transmitting port according to the configured parameters; receiving and detecting the power and time delay of a signal at the target radio frequency receiving port; and calculating a line loss compensation value of the coaxial cable corresponding to the radio frequency point according to the power and the time delay so as to calibrate the line loss of the target radio frequency transmitting port and/or the target radio frequency receiving port at the radio frequency point.
In an optional embodiment, when line loss calibration needs to be performed on at least two rf transmitting ports, for each of the at least two rf transmitting ports, the rf transmitting port is designated as a target rf transmitting port, and the target rf transmitting port and the target rf receiving port are connected by a coaxial cable.
In an optional embodiment, when line loss calibration needs to be performed on at least two rf receiving ports, for each of the at least two rf receiving ports, the rf receiving port is designated as a target rf receiving port, and the target rf receiving port and the target rf transmitting port are connected by a coaxial cable.
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 system, apparatus and method may be implemented in other ways. 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.
The 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.
It should be understood that the embodiments of the present invention can be combined with each other from the drawings, the embodiments and the features to solve the above technical problems.
The functions, 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 includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A method for calibrating a channel simulator, comprising:
monitoring whether any one preset calibration time in a plurality of calibration times is reached;
when any one calibration time is reached, starting a self-calibration function to perform self-calibration on the radio frequency port of the channel simulator; the plurality of calibration occasions comprises at least: the method comprises the following steps that at least two items of preset time periods are reached in the starting and running processes or the temperature of a target monitoring point in the running process meets preset conditions; the temperature of the target monitoring point meeting the preset conditions comprises the following steps: the temperature difference between the target monitoring point and the target monitoring point reaches a threshold value when the radio frequency port is subjected to self-calibration at the previous time;
appointing a target radio frequency transmitting port and a target radio frequency receiving port; the target radio frequency transmitting port and the target radio frequency receiving port are connected through a coaxial cable;
acquiring content to be calibrated and parameters to be configured; the contents requiring calibration include: power and/or time delay, and radio frequency points; the parameters to be configured comprise: the transmitting power of a target radio frequency transmitting port;
at each radio frequency point: transmitting corresponding signals through the target radio frequency transmitting port according to the configured parameters; receiving and detecting the power and time delay of a signal at the target radio frequency receiving port; and calculating a line loss compensation value of the coaxial cable corresponding to the radio frequency point according to the power and the time delay so as to calibrate the line loss of the target radio frequency transmitting port and/or the target radio frequency receiving port at the radio frequency point.
2. The method of claim 1, prior to initiating a self-calibration function to self-calibrate the radio frequency port of the channel simulator, further comprising:
outputting a prompt that the temperature difference reaches a threshold value;
and when receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
3. The method of claim 1, when a predetermined period of time is reached during operation, before initiating a self-calibration function to self-calibrate the radio frequency port of the channel simulator, further comprising:
outputting a prompt for reaching a preset time period;
and when receiving a command for starting the self-calibration function of the port triggered by a user, starting the self-calibration function to calibrate the radio frequency port of the channel simulator.
4. The method of claim 1, wherein when line loss calibration is required for at least two rf transmitting ports, for each of the at least two rf transmitting ports, the rf transmitting port is designated as a target rf transmitting port, and the target rf transmitting port and the target rf receiving port are connected by a coaxial cable.
5. The method of claim 1, wherein when line loss calibration is required for at least two rf receiving ports, for each of the at least two rf receiving ports, the rf receiving port is designated as a target rf receiving port, and the target rf receiving port and the target rf transmitting port are connected by a coaxial cable.
6. A channel simulator calibration apparatus, comprising:
the monitoring module is used for monitoring whether any one preset calibration time in a plurality of calibration times is reached; the plurality of calibration occasions comprises at least: the method comprises the following steps that at least two items of preset time periods are reached in the starting and running processes or the temperature of a target monitoring point in the running process meets preset conditions; the temperature of the target monitoring point meeting the preset conditions comprises the following steps: the temperature difference between the target monitoring point and the target monitoring point reaches a threshold value when the radio frequency port is subjected to self-calibration at the previous time;
the first calibration module is used for starting a self-calibration function to perform self-calibration on the radio frequency port of the channel simulator when any one calibration time is reached;
the second calibration module is used for appointing a target radio frequency transmitting port and a target radio frequency receiving port; the target radio frequency transmitting port and the target radio frequency receiving port are connected through a coaxial cable; acquiring content to be calibrated and parameters to be configured; the contents requiring calibration include: power and/or time delay, and radio frequency points; the parameters to be configured comprise: the transmitting power of a target radio frequency transmitting port; at each radio frequency point: transmitting corresponding signals through the target radio frequency transmitting port according to the configured parameters; receiving and detecting the power and time delay of a signal at the target radio frequency receiving port; and calculating a line loss compensation value of the coaxial cable corresponding to the radio frequency point according to the power and the time delay so as to calibrate the line loss of the target radio frequency transmitting port and/or the target radio frequency receiving port at the radio frequency point.
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| CN101937066A (en) * | 2009-07-02 | 2011-01-05 | 臧佳菁 | Self-calibrating method of internal reference resistors of multi-range digital electronic measuring instrument |
| CN105610521A (en) * | 2016-01-12 | 2016-05-25 | 上海斐讯数据通信技术有限公司 | Terminal radio frequency calibration method and terminal |
| CN105812073A (en) * | 2014-12-31 | 2016-07-27 | 上海贝尔股份有限公司 | Horizontal and vertical combined calibration method and device for active antenna array |
| CN105933034A (en) * | 2016-04-22 | 2016-09-07 | 广东欧珀移动通信有限公司 | Line loss measurement method and device |
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| US7031669B2 (en) * | 2002-09-10 | 2006-04-18 | Cognio, Inc. | Techniques for correcting for phase and amplitude offsets in a MIMO radio device |
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| CN101937066A (en) * | 2009-07-02 | 2011-01-05 | 臧佳菁 | Self-calibrating method of internal reference resistors of multi-range digital electronic measuring instrument |
| CN105812073A (en) * | 2014-12-31 | 2016-07-27 | 上海贝尔股份有限公司 | Horizontal and vertical combined calibration method and device for active antenna array |
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