CN102638320A - Method and equipment for determining radiofrequency signal calibration parameter of terminal testing instrument - Google Patents
Method and equipment for determining radiofrequency signal calibration parameter of terminal testing instrument Download PDFInfo
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- CN102638320A CN102638320A CN201210141352XA CN201210141352A CN102638320A CN 102638320 A CN102638320 A CN 102638320A CN 201210141352X A CN201210141352X A CN 201210141352XA CN 201210141352 A CN201210141352 A CN 201210141352A CN 102638320 A CN102638320 A CN 102638320A
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Abstract
The embodiment of the invention discloses a method and equipment for determining the radiofrequency signal calibration parameter of a terminal testing instrument. According to the technical scheme of the embodiment of the invention, the terminal testing instrument is used for instructing a terminal to return a power measured value of a radiofrequency signal through an AT command after transmitting the radiofrequency signal according to desired power and a current attenuation value, and updating the current attenuation value according to the power measured value, so that the radiofrequency signal calibration parameter of the terminal testing instrument is updated automatically by using the AT command, the terminal testing instrument can be used for calibrating power in the transmitting process of the radiofrequency signal according to a more accurate calibration parameter, the system cost is reduced, the testing efficiency is increased, and the credibility of the test result of a system is improved; and moreover, the method is not limited to a terminal protocol accordance testing instrument, and the calibration parameter of any instrument capable of interacting based on the AT command can be determined by using the method.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of definite method and apparatus of radiofrequency signal calibration parameter of terminal test instrument.
Background technology
In terminal protocol uniformity test instrument, the radiofrequency signal calibration is a very critical step, its objective is to guarantee that its radio frequency output signal meets the basic demand of test, can not cause test result inaccurate because of instrumental error.
In the terminal protocol uniformity test; Instrument often need maintain the power difference of a plurality of sub-districts in the smaller scope; If the radiofrequency signal of instrument system output at this moment is inaccurate; Then might cause the sub-district that the terminal can't resident expectation, perhaps can't gravity treatment to Target cell, cause the use-case failure.Therefore, regularly carrying out the calibration of power is to guarantee the normal important prerequisite of using of test instrumentation.
In the prior art, to the radio frequency output signal of terminal protocol uniformity test instrument, corresponding calibration program generally comprises following dual mode.
Mode one, utilize special-purpose frequency spectrum instrument to combine adjustable attenuator to realize calibration.
The principle of this kind calibrating mode is to have utilized the constant characteristic of instrument system radio-frequency line path loss; As shown in Figure 1; Be a kind of special-purpose frequency spectrum instrument combination adjustable attenuator that utilizes of the prior art, realize the system configuration sketch map of the radio frequency output signal calibration of terminal test instrument.
As can be seen from Figure 1, the software and hardware module of participation RF calibration comprises:
A) the master control module 11.
This is a software module, is the software kernels of terminal test instrument, has realized the major function of instrument.
During normal use, indicate the desired output signal power of radiofrequency signal control module 12 current test instrumentations by this module.
B) the radiofrequency signal control module 12.
This is a software module, according to the indication of air protocol processing module, drives radio-frequency module 13, the output desired signal power.
C) radio-frequency module 13.
This is a hardware module, is used to produce radiofrequency signal.
D) adjustable attenuator.
It comprises adjustable attenuator hardware module 14 and adjustable attenuator software module 15, the pad value size of adjustable attenuator software module 15 regulated attenuators, and adjustable attenuator hardware module 14 is accomplished the signal attenuation function.
E) frequency spectrograph.
Belong to hardware device, be used for the radio frequency power output of measuring terminals test instrumentation.
Based on above-mentioned module of software and hardware structure, utilize special-purpose frequency spectrum instrument to combine adjustable attenuator to realize that the handling process of calibration is following accordingly:
(1) primary module indication radiofrequency signal control module expects for system output signal intensity to be the radiofrequency signal of a.
(2) radiofrequency signal exports gauge external to through the adjustable attenuator hardware components, and the initial value of attenuator is set to b.
(3) link to each other with frequency spectrograph through the radio frequency cable; Because the sum of errors line loss that test instrumentation is inner, its real signal value output has not been a, learns that by the frequency spectrograph measurement present output signal strength is a '; Accordingly, a-a ' is considered to the fixed error of test instrumentation.
(4) calibration personnel is according to measurement result, through the adjustable attenuator software module, pad value is changed (a-a ').
(5) reuse frequency spectrograph measuring instrument output signal, the signal value of this moment will become: a '+(a-a ')=a.
So far, calibration finishes.The radio frequency output signal of terminal test instrument is calibrated.
This method is widely used in all kinds of terminal test instrument at present.In addition, for the not high instrument of some precision, can the programmable attenuator that system is built-in be replaced by the step attenuator of common manual control, but its implementation does not have essential change.
Mode two, through the measured value and the desired value of contrast terminal to report, the radiofrequency signal power output of adjustment terminal test instrument realizes the automation calibration of power.
This processing mode utilizes space interface signaling information order terminal that the current area signal measurements is reported test instrumentation; Instrument is poor through measurement of comparison value and desired value; Adjust the value of virtual attenuator software module; Change the radiofrequency signal power output of terminal test instrument, finally accomplish the automation calibration of power of instrument.
As shown in Figure 2, for of the prior art a kind of based on measured value and desired value relatively carry out power adjustment, realize the system configuration sketch map of the method for signal calibration.
Based on module of software and hardware structure shown in Figure 2, accordingly based on measured value and desired value relatively carry out the power adjustment, the handling process of the method for realization signal calibration is following:
(1) terminal protocol uniformity test instrument is set up simulated environment.
(2) main control module 21 indication radiofrequency signal control modules 22 expectation power a.
(3) virtual attenuator 23 initial decay values are set to b.
(4) radiofrequency signal control module 22 drives radio-frequency module 24 according to the input value of main control module 21 and virtual attenuator 23, and output power value is the radiofrequency signal of a '.
(5) commercial mobile phone or the test terminal signaling through eating dishes without rice or wine, the current demand signal power a ' that the terminal is measured passes to main control module 21.
(6) main control module 21 is according to measured value, and the pad value of indicating virtual attenuator 23 is changed to b-(a-a ') by initial value b.
(7) commercial mobile phone or the test terminal signaling through eating dishes without rice or wine, the current demand signal power a ' ' that the terminal is measured passes to main control module 21.
(8) main control module 21 is confirmed a ' '=a.
(9) pad value of virtual attenuator 23 fixedly installs into b-(a-a '), is performed until next calibration operation, and this calibration operation finishes.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
1, hardware cost is high, and implementation is complicated.
In order to reach the purpose of calibration power, need be in test instrumentation the in-built electrical controlled attenuator, and the general inner space of instrument is narrow and small, extra increase hardware has proposed requirements at the higher level to indoor design, the heat radiation of instrument undoubtedly, has also increased the purchase cost of hardware simultaneously.
2, automaticity is low.
Need the people for reading true measurement result, compare with desired value in the whole calibration process, and need the artificial occurrence that adjustable attenuator is set, can't realize the calibration of automation.If metered quantity is more, perhaps need frequently calibrate in the test process, then whole work takes time and effort, efficient is extremely low.
3, the application scenario is restricted.
The main purpose of terminal protocol uniformity test instrument is to carry out the terminal protocol uniformity test; This test does not have clear and definite constraint to the RF index at terminal; Therefore in this type instrument; Whether the output of checking instrument radio frequency accurately just can not use absolute standard, but will be standard with the measured value of tested object, and existing calibrating mode has not been suitable for this occasion.
4, need there be space interface signaling mutual with the terminal.
Though mode two is compared mode one improvement is arranged, but still need mutual on the signaling be arranged with the terminal.
Summary of the invention
The embodiment of the invention provides a kind of definite method and apparatus of radiofrequency signal calibration parameter of terminal test instrument; Solve in the existing technical scheme; Existing system cost is high, and the problem that can not confirm the radiofrequency signal calibration parameter reasonable, convenient, accurately.
For achieving the above object, the embodiment of the invention provides a kind of definite method of radiofrequency signal calibration parameter of terminal test instrument on the one hand, may further comprise the steps at least:
The terminal test instrument is sent radiofrequency signal according to expectation power and current pad value to the terminal;
Said terminal test instrument is sent the AT instruction to said terminal, indicates said terminal to return the power measurement values of said radiofrequency signal;
Said terminal test instrument is upgraded said current pad value according to said power measurement values.
On the other hand, the embodiment of the invention also provides a kind of terminal test instrument, comprises main control module, radiofrequency signal control module, virtual attenuator and radio-frequency module:
Said main control module; Be used for respectively to said radiofrequency signal control module and said virtual attenuator configuration expectation power and current pad value; At said radio-frequency module after radiofrequency signal is sent at the terminal; Send the AT instruction to said terminal, indicate said terminal to return the power measurement values of said radiofrequency signal, and upgrade said current pad value according to said power measurement values;
Said radiofrequency signal control module, the current pad value that expectation power and the said virtual attenuator that is used for disposing according to said main control module reported drives said radio-frequency module and has the radiofrequency signal of corresponding power to the transmission of said terminal;
Said virtual attenuator is used to preserve the current pad value that said main control module disposes, and reports corresponding current pad value to said radiofrequency signal control module;
Said radio-frequency module is used for the indication according to said radiofrequency signal control module, thinks that the transmission of said terminal has the radiofrequency signal of corresponding power value.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; The terminal test instrument according to expectation power and current pad value after radiofrequency signal is sent at the terminal, return the power measurement values of radiofrequency signal through this terminal of AT instruction indication, and upgrade current pad value according to power measurement values; Thereby; Utilize AT instruction that the radiofrequency signal calibration parameter of terminal test instrument is carried out automation and upgrade, the terminal test instrument can be calibrated power in the process of transmitting of radiofrequency signal according to calibration parameter more accurately, reduce system cost, improve testing efficiency; The test result confidence level of elevator system; And this method is not limited to terminal protocol uniformity test instrument, anyly can carry out mutual instrument based on AT instruction and all can use this method to carry out confirming of calibration parameter.
Description of drawings
Fig. 1 is a kind of special-purpose frequency spectrum instrument combination adjustable attenuator that utilizes of the prior art;
Fig. 2 a kind ofly relatively carries out power adjustment, the system configuration sketch map of the method for realization signal calibration based on measured value and desired value for of the prior art;
Fig. 3 is the schematic flow sheet of definite method of the radiofrequency signal calibration parameter of a kind of terminal test instrument that the embodiment of the invention proposed;
Fig. 4 is the schematic flow sheet of the checking processing procedure in definite method of the radiofrequency signal calibration parameter of a kind of terminal test instrument that the embodiment of the invention proposed;
Fig. 5 is the system configuration sketch map under the concrete application scenarios of definite method of the radiofrequency signal calibration parameter of a kind of terminal test instrument that the embodiment of the invention proposed;
Fig. 6 is the schematic flow sheet of definite method of the radiofrequency signal calibration parameter of the terminal test instrument under a kind of concrete application scenarios that the embodiment of the invention proposed;
Fig. 7 is the structural representation of a kind of terminal test instrument of embodiment of the invention proposition.
Embodiment
Of background technology, the calibration parameter that existing mode one is proposed confirms that the hardware cost of scheme is high, and implementation is complicated; And automaticity is low, is subject to application scenarios, though mode two has proposed a kind of more advanced processing scheme; But it need depend on the mutual of space interface signaling; In the radio frequency cable connects the process of check and correction, carry out the transmission of space interface signaling, can exert an influence, and and then influence the accuracy of pad value corresponding measurement result.
In order to overcome such defective; The embodiment of the invention has proposed a kind of definite method of radiofrequency signal calibration parameter of terminal test instrument; Utilize AT instruction automation to upgrade the radiofrequency signal calibration parameter (being pad value) of terminal test instrument; And and then according to corresponding radiofrequency signal calibration parameter the power of radiofrequency signal is calibrated, realize the initial auto-calibration of radiofrequency signal in the terminal test instrument.
As shown in Figure 3, be the schematic flow sheet of definite method of the radiofrequency signal calibration parameter of a kind of terminal test instrument that the embodiment of the invention proposed, this method specifically may further comprise the steps:
Step S301, terminal test instrument are sent radiofrequency signal according to expectation power and current pad value to the terminal.
Before this step; Said terminal test instrument need be set up the simulation test environment; In such simulation test environment; The terminal test instrument is through carrying out the transmission of radiofrequency signal to the terminal, and the feedback of terminal measurement result carries out the adjustment of calibration parameter, such simulation test environment in case appear at the initialization of terminal test instrument or situation about need adjust the terminal test instrument under.
Step S302, said terminal test instrument are sent the AT instruction to said terminal, indicate said terminal to return the power measurement values of said radiofrequency signal.
Carry out alternately through AT instruction and terminal, need not instruct transmission, can avoid space interface signaling to take the radio frequency cable and carry out the mutual problem that influences measurement result accuracy that is caused through the radio frequency cable.
In concrete the application, the AT instruction of this step indication can be specially the AT+CSQ instruction.
AT instruction is the Attention instruction, and the AT instruction generally is applied to being connected and communicating by letter between terminal and the PC application.
The AT+CSQ instruction is used to inquire about current signal quality, and the terminal test instrument is carried out channel quality measurement with this instruction indicating terminal, and feeds back corresponding measurement result, and in current simulation test scene, concrete measurement index is the power of radiofrequency signal.
The terminal test instrument is carried out the measurement of channel quality through AT+CSQ instruction indicating terminal; Owing to be the test simulation environment; The current channel quality that the terminal is measured; Be the power measurement values of the radiofrequency signal that step S301 sent, the power measurement values that terminal test instrument receiving terminal returns, and carry out follow-up pad value according to power measurement values and upgrade.
Need to prove; The example of the above-mentioned AT+CSQ instruction a kind of concrete AT instruction that just present embodiment proposed; Other AT instructions that can reach constructed effect can be applied to the technical scheme that the embodiment of the invention proposes equally, and such variation does not influence protection scope of the present invention.
Step S303, said terminal test instrument are upgraded said current pad value according to said power measurement values.
In practical application, said terminal test instrument is updated to said current pad value:
The decay Zhi – of new current pad value=current (expectation Gong Shuai – power measurement values).
The theoretical foundation of upgrading like this is following:
In step S301, the terminal test instrument is an actual emission power with (expectation power+current pad value), carries out the transmission of radiofrequency signal.
The size of the power measurement values that the received terminal of terminal test instrument is returned (also being the actual reception power at terminal) is (expectation power+current decay value – actual attenuation value); Therefore; Can obtain the actual attenuation value according to above-mentioned computing formula; The terminal test instrument can be carried out the update processing of current pad value according to this actual attenuation value, thereby, follow-up radiofrequency signal process of transmitting is calibrated according to the actual attenuation value.
What need further specify is that through the handling process of above-mentioned step S301 to step S303, the power measurement values that the terminal test instrument is returned according to the terminal is upgraded current pad value; The terminal test instrument can be upgraded and accomplish back end simulation test environment, and carries out the calibration and the transmission of the radiofrequency signal of reality according to the pad value that upgrades, still; In the application scenarios of reality, handle if only carry out above-mentioned primary calibration, may error appear owing to some accidental errors cause calibration result; Therefore; In the simulation test environment, can after above-mentioned step S303 is complete, further verify processing procedure accordingly.
Said terminal test instrument execution in step S303; After the renewal of completion to current pad value, continue to keep current simulation test environment, and further with the pad value after upgrading as new current pad value; The processing procedure of checking below carrying out, corresponding schematic flow sheet is as shown in Figure 4.
Step S304, said terminal test instrument are sent radiofrequency signal according to expectation power and current pad value to the terminal.
The current pad value here is the pad value after upgrading, i.e. terminal test instrument is carried out the transmission of radiofrequency signal according to the pad value that step S303 calibrated.
Step S305, said terminal test instrument are sent the AT instruction to said terminal, indicate said terminal to return the power measurement values of said radiofrequency signal.
S302 is similar with step, and the AT instruction of this step indication can be specially the AT+CSQ instruction.
The terminal test instrument is carried out the measurement of channel quality through AT+CSQ instruction indicating terminal; Owing to be the test simulation environment; The current channel quality that the terminal is measured is the power measurement values of the radiofrequency signal that step S304 sent, this power measurement values that terminal test instrument receiving terminal returns.
Need to prove, if keep current simulation test environment, after step S302 sends the AT instruction; The terminal can be under this simulation test environment, and self received radiofrequency signal is carried out power measurement always, and carries out the feedback of corresponding measurement result; In such cases, step S305 does not then need to carry out, accomplish the transmission of radiofrequency signal at step S304 after; The power measurement result that direct receiving terminal returns, and execution in step S306.
Step S306, said terminal test instrument judge whether said power measurement values equals said expectation power.
The effect of this step is to verify through step S301 to the calibration process of step S303; Whether the pad value after the renewal can realize calibration process accurately to the radiofrequency signal that the terminal test instrument is sent; Promptly remedy the influence that the actual transmissions process is brought the radio frequency signal power, the power of radiofrequency signal is realized calibration through current pad value.
If equal; Represent that then current pad value can realize calibration process accurately to radiofrequency signal; Said terminal test instrument confirms that said current pad value comes into force; Finish current simulation test environment, accomplish current calibration process, and can in flow, calibrate radiofrequency signal according to current pad value.
If be not equal to; Then represent to realize calibration process accurately to radiofrequency signal according to current pad value; Therefore; The terminal test instrument is upgraded current pad value according to the received power measurement values of step S306, and with the pad value after upgrading as new current pad value, execution in step S304 again.
Promptly begin the pad value checking processing procedure of a new round, for equaling, confirm that just current pad value can come into force, and accomplish and verify processing procedure accordingly until the judged result of step S306.
S303 is similar with step, and the terminal test instrument that reaches mentioned herein is accomplished according to following formula according to the processing procedure of the current pad value of the received power measurement values renewal of step S306 equally:
The decay Zhi – of new current pad value=current (expectation Gong Shuai – power measurement values).
Need to prove; Above-mentioned step S304 is the proof procedure to definite result of current pad value to step S306, and this mainly is the accuracy in order to ensure accordingly result, but in fact; Lie in the rate accidental error; Perhaps under the non-existent situation of accidental error, step S301 can accomplish the definite processing procedure to current pad value to step S303, therefore; Whether carry out above-mentioned checking processing procedure and can confirm according to actual needs that such variation belongs to protection scope of the present invention equally.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; The terminal test instrument according to expectation power and current pad value after radiofrequency signal is sent at the terminal, return the power measurement values of radiofrequency signal through this terminal of AT instruction indication, and upgrade current pad value according to power measurement values; Thereby; Utilize AT instruction that the radiofrequency signal calibration parameter of terminal test instrument is carried out automation and upgrade, the terminal test instrument can be calibrated power in the process of transmitting of radiofrequency signal according to calibration parameter more accurately, reduce system cost, improve testing efficiency; The test result confidence level of elevator system; And this method is not limited to terminal protocol uniformity test instrument, anyly can carry out mutual instrument based on AT instruction and all can use this method to carry out confirming of calibration parameter.
Below, the application scenarios in conjunction with concrete describes the technical scheme that the embodiment of the invention proposed.
In the technical scheme that the embodiment of the invention proposed, made full use of the characteristics of terminal test instrument (especially terminal protocol uniformity test instrument), the mode that adopts software and hardware to combine realizes confirming of radiofrequency signal calibration parameter.
Compare with the mode one of prior art; Cancellation adjustable attenuator hardware components adds a virtual attenuator software module in the terminal test instrument, and frequency spectrograph is replaced by commercial mobile phone or test terminal; Simplify corresponding system configuration, practiced thrift the cost of system deployment.
On the other hand; Compare with the mode two of prior art; This programme is set up signaling and is connected between terminal test instrument and terminal, make it form the test macro of a closed loop, utilizes AT command request terminal that the current area signal measurements is reported the terminal test instrument; The terminal test instrument is poor through measurement of comparison value and desired value; Adjust the current pad value that is write down of virtual attenuator software module, change the radiofrequency signal power output of terminal test instrument, finally accomplish the automation calibration of power of instrument.
As shown in Figure 5, be the system configuration sketch map under the concrete application scenarios of definite method of the radiofrequency signal calibration parameter of a kind of terminal test instrument that the embodiment of the invention proposed.
Based on above-mentioned system configuration; As shown in Figure 6, be the schematic flow sheet of definite method of the radiofrequency signal calibration parameter of the terminal test instrument under a kind of concrete application scenarios that the embodiment of the invention proposed, in the present embodiment; Initialization procedure with after the startup of terminal test instrument is that example describes; Wherein, this terminal test instrument need be carried out aforesaid step S304 to the described checking processing procedure of step S306, and this method specifically may further comprise the steps:
Step S601, terminal test instrument are set up simulated environment.
Step S602, main control module 51 will expect that power a indicates to radiofrequency signal control module 52.
Step S603, virtual attenuator 53 initial decay values are set to b.
Because the terminal test instrument just starts; Can dispose initial pad value in the virtual attenuator 53; This pad value can be the initial value that the terminal test instrument is disposed when dispatching from the factory, and the size of this initial value can be to obtain according to the statistics of the experimental data under the general general scene, also can be the numerical value of industry agreement regulation; Perhaps, directly can this initial value be confirmed as 0.
Certainly, above-mentioned initial decay value can be directly to be configured in the virtual attenuator 53, also can be arranged in the main control module 51, and after system start-up, main control module 51 disposes this initial decay value to virtual attenuator 53.
In practical application, the size and the configuration mode of concrete initial decay value can confirm according to actual needs that such variation does not influence protection scope of the present invention.
Need be pointed out that further that above-mentioned step S602 and S603 not convenient for walking do not have inevitable sequencing relation, concrete label is explanation for ease just, and both can't influence protection scope of the present invention at the exchange of order.
Step S604, radiofrequency signal control module 52 drive radio-frequency module 54 according to the input value of main control module 51 and virtual attenuator 53, to commercial mobile phone or test terminal output radiofrequency signal.
In this step, the performance number of the radiofrequency signal of being exported should be a+b, promptly through above-mentioned steps, under the situation of considering the radio signal transmission power loss, the radiofrequency signal of sending is carried out power back-off.
Step S605, main control module 51 send AT instruction AT+CSQ for commercial mobile phone or test terminal through serial ports, indicate the power measurement result of its feedback to radiofrequency signal.
The AT+CSQ instruction is actually used in the current signal quality of inquiry; Channel quality measurement is carried out in this instruction commercial mobile phone of indication of main control module 51 usefulness or test terminal; And feed back corresponding measurement result, in the simulation test scene that current step S601 set up, concrete measurement index is the power of radiofrequency signal; The power measurement result of the radiofrequency signal that to be commercial mobile phone or test terminal sent radio-frequency module 54 among the step S604 that therefore, the measurement result of main control module 51 indication feedback is actual.
The current radiofrequency signal power measurement of step S606, the main control module 51 commercial mobile phones of reception or test terminal feedback is a ' as a result.
Because main control module 51 is to carry out alternately through AT instruction and commercial mobile phone or test terminal among step S605 and the step S606; Therefore; Can not take the resource of radio frequency cable; Thereby, can not influence commercial mobile phone or test terminal through the power measurement of radio frequency cable to corresponding radiofrequency signal yet, guaranteed the accuracy of corresponding measurement result.
Step S607, main control module 51 be according to the power measurement values a ' that receives, indicate virtual attenuator 53 with current pad value by initial value b be changed to b-(a '-a).
The foundation of handling like this does, the measured performance number a ' in commercial mobile phone or test terminal is the performance number a ' of the radiofrequency signal that its actual reception arrives, therefore, and relation below relevant parameters satisfies:
Actual power dissipation value in a '=a+b – transmission course.
Adjust above-mentioned formula, promptly obtain:
Actual power dissipation value=b in the transmission course+a – a '; Be aforesaid b-(a '-a); Pad value after the renewal is the basis with initial value b, with reference to the difference of real output with the actual reception power that measures, carries out the correction of corresponding pad value.
So far, accomplished definite process of primary radiofrequency signal calibration parameter (being current pad value), below, begin to carry out checking processing procedure to determined current pad value.
The expectation power a that step S608, radiofrequency signal control module 52 are imported according to main control module 51, and the current pad value b that imported of virtual attenuator 53 drive radio-frequency module 54, to commercial mobile phone or test terminal output radiofrequency signal.
Need to prove that the value of current pad value b of this moment has not been the b value among the aforesaid step S603, and should be among the step S607 b-(a '-a).
Step S609, commercial mobile phone or the test terminal signaling through eating dishes without rice or wine, the current demand signal power a ' ' that the terminal is measured passes to main control module 51.
Because main control module 51 sent the AT instruction to commercial mobile phone or test terminal among the step S605 before, therefore, power measurement and result's feedback of radiofrequency signal can be carried out in commercial mobile phone or test terminal always under current simulation test environment.
Step S610, main control module 51 judge whether a ' '=a sets up.
If set up, represent that then current pad value can realize calibration process accurately to radiofrequency signal, continue execution in step S611.
If be false, represent that then current pad value can't realize calibration process accurately to radiofrequency signal, therefore, establish a ' '=a ', return step S607 and proceed corresponding pad value adjustment and checking processing procedure.
Step S611, virtual attenuator 53 current pad value b fixedly install into b-(a-a '), finish current analog calibration environment, and this calibration process finishes.
The execution of this step, the adjustment among the identification of steps S607 comes into force, and the term of validity of this pad value b is performed until next calibration operation.
Need further be pointed out that; Above-mentioned step S601 to the processing procedure of step S611 be confirming and adjustment process in the initialization procedure of describing after end measuring instrument starts to corresponding radiofrequency signal calibration parameter; In the end measuring instrument running; Also can when needs carry out the adjustment of corresponding radiofrequency signal calibration parameter, carry out above-mentioned processing procedure, its variation of specifically carrying out opportunity can't influence protection scope of the present invention.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; The terminal test instrument according to expectation power and current pad value after radiofrequency signal is sent at the terminal, return the power measurement values of radiofrequency signal through this terminal of AT instruction indication, and upgrade current pad value according to power measurement values; Thereby; Utilize AT instruction that the radiofrequency signal calibration parameter of terminal test instrument is carried out automation and upgrade, the terminal test instrument can be calibrated power in the process of transmitting of radiofrequency signal according to calibration parameter more accurately, reduce system cost, improve testing efficiency; The test result confidence level of elevator system; And this method is not limited to terminal protocol uniformity test instrument, anyly can carry out mutual instrument based on AT instruction and all can use this method to carry out confirming of calibration parameter.
In order to realize the technical scheme of the embodiment of the invention, the embodiment of the invention also provides a kind of terminal test instrument, and its structural representation is as shown in Figure 7, comprises main control module 71, radiofrequency signal control module 72, virtual attenuator 73 and radio-frequency module 74:
Said main control module 71; Be used for respectively to said radiofrequency signal control module 72 and said virtual attenuator 73 configuration expectation power and current pad values; At said radio-frequency module 74 after radiofrequency signal is sent at the terminal; Send the AT instruction to said terminal, indicate said terminal to return the power measurement values of said radiofrequency signal, and upgrade said current pad value according to said power measurement values;
Said radiofrequency signal control module 72, the current pad value that expectation power that is used for being disposed according to said main control module 71 and said virtual attenuator 73 are reported drives said radio-frequency module 74 and sends to said terminal and have the radiofrequency signal of corresponding power;
Said virtual attenuator 73 is used to preserve the current pad value that said main control module 71 is disposed, and reports corresponding current pad value to said radiofrequency signal control module 72;
Said radio-frequency module 74 is used for the indication according to said radiofrequency signal control module 72, thinks that the transmission of said terminal has the radiofrequency signal of corresponding power value.
Further, said main control module 71 also is used for:
Respectively before said radiofrequency signal control module 72 and said virtual attenuator 73 configuration expectation power and current pad value, set up the simulation test environment.
In practical application, said main control module 71 also is used for:
After upgrading said current pad value according to said power measurement values; With the pad value after upgrading as new current pad value; To said radiofrequency signal control module 72 and said virtual attenuator 73 configuration expectation power and current pad values, trigger said radiofrequency signal control module 72 is sent radiofrequency signal from corresponding power to the terminal respectively;
After radiofrequency signal is sent at the terminal, send the AT instruction at said radio-frequency module 74, indicate said terminal to return the power measurement values of said radiofrequency signal to said terminal;
Judge whether the power measurement values of returning at said terminal equals said expectation power;
If equal, indicate said virtual attenuator 73 that said current pad value is come into force, accomplish current calibration process;
If be not equal to; Upgrade said current pad value according to the power measurement values of returning; And with the pad value after upgrading as new current pad value; Again respectively to said radiofrequency signal control module 72 and said virtual attenuator 73 configuration expectation power and current pad values; Trigger the radiofrequency signal that said radiofrequency signal control module 72 is sent corresponding power to said terminal, and current pad value is upgraded, equal said expectation power until the power measurement values of returning according to the power measurement values that said terminal is returned.
Need to prove that said main control module 71 specifically is used for:
Send the AT+CSQ instruction to said terminal.
Concrete, said main control module 71 specifically is used for:
Power measurement values according to said terminal is returned is updated to said current pad value:
The decay Zhi – of new current pad value=current (expectation Gong Shuai – power measurement values).
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; The terminal test instrument according to expectation power and current pad value after radiofrequency signal is sent at the terminal, return the power measurement values of radiofrequency signal through this terminal of AT instruction indication, and upgrade current pad value according to power measurement values; Thereby; Utilize AT instruction that the radiofrequency signal calibration parameter of terminal test instrument is carried out automation and upgrade, the terminal test instrument can be calibrated power in the process of transmitting of radiofrequency signal according to calibration parameter more accurately, reduce system cost, improve testing efficiency; The test result confidence level of elevator system; And this method is not limited to terminal protocol uniformity test instrument, anyly can carry out mutual instrument based on AT instruction and all can use this method to carry out confirming of calibration parameter.
Through the description of above execution mode, those skilled in the art can be well understood to the embodiment of the invention and can realize through hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; The technical scheme of the embodiment of the invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, or network equipment etc.) each implements the described method of scene to carry out the embodiment of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred sketch map of implementing scene, module in the accompanying drawing or flow process might not be that embodiment of the present invention embodiment is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in the scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of implementing scene just to description.
More than the disclosed several practical implementation scenes that are merely the embodiment of the invention, still, the embodiment of the invention is not limited thereto, any those skilled in the art can think variation all should fall into the traffic limits scope of the embodiment of the invention.
Claims (10)
1.
A kind of definite method of radiofrequency signal calibration parameter of terminal test instrument is characterized in that, may further comprise the steps at least:
The terminal test instrument is sent radiofrequency signal according to expectation power and current pad value to the terminal;
Said terminal test instrument is sent the AT instruction to said terminal, indicates said terminal to return the power measurement values of said radiofrequency signal;
said terminal test instrument is upgraded said current pad value according to said power measurement values.
2.
The method of claim 1 is characterized in that, said terminal test instrument, also comprised before radiofrequency signal is sent at the terminal according to expectation power and current pad value:
said terminal test instrument is set up the simulation test environment.
3.
The method of claim 1 is characterized in that, said terminal test instrument is upgraded according to said power measurement values after the said current pad value, and said terminal test instrument as new current pad value, is carried out following steps with the pad value after upgrading:
Steps A, said terminal test instrument are sent radiofrequency signal according to expectation power and current pad value to the terminal;
Step B, said terminal test instrument are sent the AT instruction to said terminal, indicate said terminal to return the power measurement values of said radiofrequency signal;
Step C, said terminal test instrument judge whether said power measurement values equals said expectation power;
If equal, said terminal test instrument confirms that said current pad value comes into force, and accomplishes current calibration process;
are upgraded said current pad value if be not equal to according to said power measurement values, and with the pad value after upgrading as new current pad value, execution in step A again.
4.
Like claim 1 or 3 described methods, it is characterized in that said terminal test instrument is sent the AT instruction to said terminal, is specially:
said terminal test instrument is sent the AT+CSQ instruction to said terminal.
5.
Like claim 1 or 3 described methods, it is characterized in that said terminal test instrument is upgraded said current pad value according to said power measurement values, specifically comprises:
Said terminal test instrument is updated to said current pad value:
The decay Zhi – of
new current pad value=current (expectation Gong Shuai – power measurement values).
?
6.
A kind of terminal test instrument is characterized in that, comprises main control module, radiofrequency signal control module, virtual attenuator and radio-frequency module:
Said main control module; Be used for respectively to said radiofrequency signal control module and said virtual attenuator configuration expectation power and current pad value; At said radio-frequency module after radiofrequency signal is sent at the terminal; Send the AT instruction to said terminal, indicate said terminal to return the power measurement values of said radiofrequency signal, and upgrade said current pad value according to said power measurement values;
Said radiofrequency signal control module, the current pad value that expectation power and the said virtual attenuator that is used for disposing according to said main control module reported drives said radio-frequency module and has the radiofrequency signal of corresponding power to the transmission of said terminal;
Said virtual attenuator is used to preserve the current pad value that said main control module disposes, and reports corresponding current pad value to said radiofrequency signal control module;
said radio-frequency module is used for the indication according to said radiofrequency signal control module, thinks that the transmission of said terminal has the radiofrequency signal of corresponding power value.
7.
Terminal test instrument as claimed in claim 6 is characterized in that, said main control module also is used for:
The simulation test environment is set up respectively before said radiofrequency signal control module and said virtual attenuator configuration expectation power and current pad value in
.
8.
Terminal test instrument as claimed in claim 6 is characterized in that, said main control module also is used for:
After upgrading said current pad value according to said power measurement values; With the pad value after upgrading as new current pad value; To said radiofrequency signal control module and said virtual attenuator configuration expectation power and current pad value, trigger said radiofrequency signal control module is sent radiofrequency signal from corresponding power to the terminal respectively;
After radiofrequency signal is sent at the terminal, send the AT instruction at said radio-frequency module, indicate said terminal to return the power measurement values of said radiofrequency signal to said terminal;
Judge whether the power measurement values of returning at said terminal equals said expectation power;
If equal, indicate said virtual attenuator that said current pad value is come into force, accomplish current calibration process;
are if be not equal to; Upgrade said current pad value according to the power measurement values of returning; And with the pad value after upgrading as new current pad value; Again respectively to said radiofrequency signal control module and said virtual attenuator configuration expectation power and current pad value; Trigger the radiofrequency signal that said radiofrequency signal control module is sent corresponding power to said terminal, and current pad value is upgraded, equal said expectation power until the power measurement values of returning according to the power measurement values that said terminal is returned.
9.
Like claim 6 or 8 described terminal test instrument, it is characterized in that said main control module specifically is used for:
The AT+CSQ instruction is sent to said terminal in
.
10.
Like claim 6 or 8 described terminal test instrument, it is characterized in that said main control module specifically is used for:
Power measurement values according to said terminal is returned is updated to said current pad value:
The decay Zhi – of
new current pad value=current (expectation Gong Shuai – power measurement values).
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| CN201210141352XA CN102638320A (en) | 2012-05-09 | 2012-05-09 | Method and equipment for determining radiofrequency signal calibration parameter of terminal testing instrument |
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