CN101437317B - Wireless radio frequency index verification apparatus and method for multi-mode mobile communication terminal - Google Patents
Wireless radio frequency index verification apparatus and method for multi-mode mobile communication terminal Download PDFInfo
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Abstract
The invention discloses a wireless radio frequency index verification device used for a multi-mode mobile communication terminal and a method thereof. The device comprises a passage building module for building passages, and a passage selecting module for conducting the multi-mode mobile communication terminal, the passages and testing instruments according to wireless radio frequency index testing items. The device and the method have the advantages of realizing automatized verification of wireless radio frequency indexes of the multi-mode mobile communication terminal, increasing the reliability of a system, improving the utilization rate of the instruments, greatly reducing the calibration time and ensuring the calibration accuracy.
Description
Technical field
The present invention relates to the checking of the wireless radio frequency index of mobile communication terminal, particularly a kind of wireless radio frequency index verification apparatus and method that is used for multimode mobile communication terminal.
Background technology
The wireless radio frequency index verification test environment makes up cumbersome, tests consuming time also long, high to tester's specialty requirement simultaneously.
One cover automated wireless radio frequency index verification apparatus can reduce the requirement of tester's professional knowledge and improve testing efficiency.In the R&D work of mobile communication terminal, the raising of the test of wireless radio frequency index and RF consistency testing efficiency is concerning the cycle of researching and developing product and the quality of product.
The wireless radio frequency index verification system is a very complicated system; The automated wireless radio frequency index verification system of present GSM mobile communication terminal is comparative maturity, and the Terminal Design company that some authenticated units and minority are solid financial strength relies on its test to accomplish the authentication of product and reliable product design is provided.
Yet; For the TDSCDMA mobile communication terminal; Automated wireless radio frequency index verification system also is in the development phase, so, the present wireless radio frequency index verification system that does not also have TDSCDMA and GSM bimodule mobile communication terminal; GSM and TDSCDMA bimodule mobile communication terminal need to carry out radio frequency research and development test and RF consistency test in different platforms respectively, and efficient is lower.
Yet; The product of bimodulus even multimode has appearred supporting in mobile communication terminal; Like TDSCDMA/GSM bimodule mobile communication terminal, CDMA/GSM bimodule mobile communication terminal etc.; So developing a kind of wireless radio frequency index verification apparatus and method that is used for multimode mobile communication terminal has become the problem that at present eager needs solve.
Summary of the invention
The purpose of this invention is to provide a kind of wireless radio frequency index verification apparatus and method that is used for multimode mobile communication terminal, realize the wireless radio frequency index verification of high efficiency multimode mobile communication terminal.
To achieve these goals, the invention provides a kind of wireless radio frequency index verification apparatus that is used for multimode mobile communication terminal, comprising:
Passage is set up module, is used to set up a plurality of passages that are used to test; Channel selecting module is used for according to the said multimode mobile communication terminal of wireless radio frequency index test item conducting, said passage and test instrumentation.
Above-mentioned device, wherein, said multimode mobile communication terminal is GSM, TD-SCDMA bimodule mobile communication terminal.
Above-mentioned device, wherein, said passage is set up module and is specifically comprised:
First passage is set up module, is used to set up TCH test channel or test accessory channel, and this TCH test channel is used to connect vector analysis appearance and multimode mobile communication terminal; This test accessory channel provides test needed interference auxiliary signal to multimode mobile communication terminal;
Second channel is set up module, is used to set up conventionally test and calls out passage, and this conventionally test is called out passage and set up being connected of comprehensive test instrument and multimode mobile communication terminal for test up-downgoing wireless radio frequency index;
Third channel is set up module, is used to set up performance test and calls out passage, and it is that test performance is set up being connected of comprehensive test instrument and multimode mobile communication terminal that passage is called out in this performance test.
Above-mentioned device, wherein, said channel selecting module specifically comprises:
First passage is selected module, is used for setting up according to the wireless radio frequency index test item one or more link conducting of mobile communication terminal and TCH test channel, test accessory channel, conventionally test calling passage and performance test calling passage;
Second channel is selected module, is used to set up first passage and sets up being connected of module and test instrumentation, sets up TCH test channel or tests accessory channel and the conducting of the test instrumentation of tone signal source, VSA according to the wireless radio frequency index test item;
Third channel is selected module, sets up two passages and sets up module or third channel and set up being connected of module and test instrumentation, is used for setting up the conducting that conventionally test is called out passage or performance test calling passage and comprehensive test instrument port according to the wireless radio frequency index test item.
Above-mentioned device, wherein, said first passage selects module also to be used for the calibration that channel link is called out in auxiliary above-mentioned TCH test channel, test accessory channel, conventionally test calling passage and performance test.
Above-mentioned device, wherein, it is filter array and straight-through link that said first passage is set up module, wherein said straight-through link is connected with the vector signal source.
Above-mentioned device, wherein, said second channel is set up module and is comprised fixed attenuator path and straight-through radio frequency cable link.
Above-mentioned device, wherein, said first passage selects module to comprise:
First single-pole double throw RF switch is used for power meter and multimode mobile communication terminal and selects one of which to be connected to the main line port of arrowband directional coupler;
Second single-pole double throw RF switch is used for that second channel is set up module fixed attenuator link and straight-through radio frequency cable link selection one of which is connected to one of selection mouth of the 3rd single-pole double throw RF switch;
The 3rd single-pole double throw RF switch closes one of road port from what second single-pole double throw RF switch and third channel set up that module selects that one of which is connected to mixer;
Mixer, the straight-through link port synthetic a tunnel of the 3rd single-pole double throw RF switch public port and first passage being set up module is connected with arrowband directional coupler coupling aperture;
The arrowband directional coupler, two main line ports are connected with the public port that the public port and the hilted broadsword of said first single-pole double-throw switch (SPDT) are thrown RF switch more respectively, and its coupled end is connected with the mixer common port;
Hilted broadsword is thrown RF switch more, selects first passage to set up in the filter array of module the main road port that a filter is connected to the arrowband directional coupler.
Above-mentioned device; Wherein, Said second channel selects module to comprise that a hilted broadsword throws RF switch and a single-pole double throw RF switch more, and one of test instrumentation that single-pole double throw RF switch is used for selecting tone signal source or VSA is connected with filter of filter array;
Above-mentioned device; Wherein, Said third channel selects module to comprise two single-pole double throw RF switch and a DPDT RF switch; Wherein the DPDT RF switch is used to select the input and output common port and output common port of one of GSM comprehensive test instrument or TD-SCDMA comprehensive test instrument, and the input and output common port is connected with the common port of first single-pole double throw RF switch, and the output common port is connected with the downlink that third channel is set up module; Two of second single-pole double throw RF switch select mouthful to set up that the fixed attenuator link is connected with straight-through radio frequency cable link in the module, be used to select one of them to set up the path of module as second channel with second channel; Two selection mouths of first single-pole double throw RF switch set up the uplink of module with third channel respectively and the common port of second single-pole double throw RF switch is connected.
Above-mentioned device, wherein, said third channel is set up module and is comprised:
Two power splitters are connected with the input/output terminal of radio-frequency channel simulator;
Mixer is used for the road of closing of uplink downlink;
Isolator is arranged between the power splitter and mixer of down link.
Fixed attenuator is connected with mixer.
In order better to realize above-mentioned purpose; The present invention also provides a kind of wireless radio frequency index verification method that is used for multimode mobile communication terminal; Be applicable to wireless radio frequency index verification apparatus, said device comprises that passage sets up module and channel selecting module, and this method comprises:
Steps A according to the demand of wireless radio frequency index test item, is utilized passage to set up module and is set up the required a plurality of passages of test;
Step B selects module according to the demand control channel of wireless radio frequency index test item, and realization multimode mobile communication terminal, passage are set up the passage of module and the connection between the test instrumentation;
Step C is provided with the parameter of test instrumentation, utilizes test instrumentation to pass through the wireless radio frequency index of said lane testing multimode mobile communication terminal.
Above-mentioned method, wherein, said multimode mobile communication terminal is GSM, TDSCDMA bimodule mobile communication terminal.
Above-mentioned method wherein, when said wireless radio frequency index test item is the test of the conventional wireless radio frequency index of the up emission of TDSCDMA, compares measurement by comprehensive test instrument and VSA simultaneously.
Above-mentioned method wherein, also comprises:
The step of carrying out the thick calibration of passage to test call link, performance test call link and test or subtest link commonly used; And/or
Before device operation first, adopt the step of carrying out passage smart calibration of external network analyzer to test call link, performance test call link and test or subtest link commonly used.
The link of smart calibration comprises all links of said test call link commonly used, performance test call link and test or subtest link; Under special operating position, a certain or some link adopts the built-in power meter of device slightly to calibrate.
Above-mentioned method, wherein, said thick calibration steps specifically comprises:
Above-mentioned method, wherein, said smart calibration is specially:
The present invention has following beneficial effect:
Realized the automation checking of the wireless radio frequency index of multimode mobile communication terminal;
The up test item of the radio frequency of multimode mobile communication terminal has adopted the mode of comprehensive test instrument and the checking of VSA contrast test, as replenishing and Redundancy Design before the TD-SCDMA comprehensive test instrument maturation, has increased the reliability of system;
In spuious test and obstruction link, utilized the very wide characteristics of arrowband directional coupler main line bandwidth, use cheap directional coupler to replace expensive broadband mixer, reduced cost;
Utilized the built-in attenuator of RF instrumentation and avoided the use of very expensive outside high-precision program control attenuator, it is considerable to practice thrift cost;
Made full use of TD time division duplex characteristic, made the partial test passage both can be used for receiver test in conjunction with the switching of RF switch and also can be used for the transmitter test, framework is effectively compact;
Except that comprehensive test instrument, all the other instrument can be public, improved the instrument utilance;
Adopt two-stage system calibration strategy; That is: adopt the external network analyzer to carry out the smart calibration of passage when moving first in system, under general operating position, the built-in power meter of employing system is slightly calibrated; Reduce the alignment time greatly, can guarantee calibration accuracy again.
Description of drawings
Fig. 1 is the structural representation of the applied environment of wireless radio frequency index verification apparatus of the present invention;
Fig. 2 is the concrete structure sketch map of wireless radio frequency index verification apparatus of the present invention;
Fig. 3 sets up the concrete structure sketch map of module for third channel;
Fig. 4 selects the concrete structure sketch map of module for first passage;
Fig. 5 is the testing process sketch map of method of the present invention.
Fig. 6 is the calibration schematic flow sheet of method of the present invention.
Embodiment
Wireless radio frequency index verification apparatus and the method that is used for multimode mobile communication terminal of the present invention; Be used to connect multimode mobile communication terminal to be measured and tester; Set up the various passages that are used to test in device inside, and then realize checking the multimode mobile communication terminal wireless radio frequency index through conducting multimode mobile communication terminal, test instrumentation and different TCH test channels.
This device also is used for the thick calibration of certain link; Through connecting the signal generator in power meter and the test instrumentation; Set up certain calibrated channel in device inside; Realize calibration according to conducting power meter, signal generator and certain calibrated channel, pass through compensation again, realize the first calibration of certain link the difference of certain path path and certain link to certain path.
As shown in Figure 1, the structural representation for the applied environment of the wireless radio frequency index verification apparatus that is used for multimode mobile communication terminal of the present invention mainly comprises 3 parts:
Test instrumentation is meant VSA, channel simulator, comprises the tone signal source that produces tone signal and produce the signal generator of vector signal and comprise signal generator and the comprehensive test instrument of signal analyzer function.
Multimode mobile communication terminal to be tested; And
Calibrated meter, i.e. power meter.
Be that example is carried out further detailed explanation to the present invention with the TDSCDMA/GSM dual-mode terminal below.
Shown in Figure 2 is the concrete structure sketch map of wireless radio frequency index verification apparatus of the present invention; As shown in Figure 2; This wireless radio frequency index verification apparatus comprises that specifically first passage sets up module, second channel and set up that module, third channel are set up module, first passage selects module, second channel to select module and third channel to select module; Above-mentioned module all adopts modularized design, wherein:
First passage is set up module, is used to set up TCH test channel or test accessory channel;
The TCH test channel of this foundation is the passage between vector analysis appearance and the TDSCDMA/GSM bimodule mobile communication terminal antenna opening; This vector analysis appearance is except the uplink conventional RF index of test bimodule mobile communication terminal; Also be used to test comprehensive test instrument the test item that can't accomplish; Like up transmit scattering, intermodulation, and test item such as descending reception stray radiation;
The test accessory channel of this foundation is the passage of the needed auxiliary signal of the descending acceptance test of TDSCDMA/GSM bimodule mobile communication terminal, and wherein, the needed auxiliary signal of the descending acceptance test of TDSCDMA/GSM bimodule mobile communication terminal mainly comprises:
Adjacent channel signal;
Band internal congestion signal;
Band external blocking signal;
The emission inter-modulated signal;
Receive inter-modulated signal; And
White Gaussian noise signal etc.
Second channel is set up module, is used to set up conventionally test and calls out passage;
It is between comprehensive test instrument and the TDSCDMA/GSM bimodule mobile communication terminal that this conventionally test is called out passage; The calling interface channel that is used to test up-downgoing wireless radio frequency index and sets up; Be the basis of wireless radio frequency index test, guarantee the calling that comprehensive test instrument and TDSCDMA/GSM bimodule mobile communication terminal foundation test needs and transmit and receive signal to satisfy the requirement of up-downgoing wireless radio frequency index with the comprehensive test instrument checking.
Third channel is set up module, is used to set up performance test and calls out passage.
This performance test is called out passage for having certain test environment requirement (being provided by the channel simulator signal), is in the passage that is used to set up calling and test performance between comprehensive test instrument and the TDSCDMA/GSM bimodule mobile communication terminal.
3 modules setting up passage have been described above; Because each passage (TCH test channel, test accessory channel, conventionally test are called out passage and performance test calling passage) has different functions; When the TDSCDMA/GSM bimodule mobile communication terminal is carried out the test of different test items; Need conducting TDSCDMA/GSM bimodule mobile communication terminal and different test instrumentations, therefore need different channel selecting module; Simultaneously, when each passage of TDSCDMA/GSM bimodule mobile communication terminal is slightly calibrated, need conducting power meter and different test instrumentations, also need different channel selecting module, again 3 channel selecting module are specified below.
First passage is selected module; Connect bimodule mobile communication terminal and passage and set up module; Perhaps connect power meter and passage is set up module; Be used for setting up the conducting that mobile communication terminal and passage are set up one or more paths of module, perhaps set up the conducting that power meter and passage are set up the one or more path paths in the module according to thick alignment requirements according to the wireless radio frequency index test item.
Second channel is selected module, and one of filter array of setting up module with first passage is connected, and is used for setting up the conducting that first passage is set up module and test instrumentation signal generator or VSA according to the wireless radio frequency index test item;
Third channel is selected module, and comprehensive test instrument and second channel are set up module or third channel and set up module and be connected, and is used for setting up second channel according to the wireless radio frequency index test item and sets up the conducting that module or third channel are set up module and comprehensive test instrument mode port.
In specific embodiment of the present invention, first passage is set up module and is made up of filter array and straight-through link, and filter array is used to guarantee that measured signal is accurately measured and auxiliary signal pure; Straight-through link connects the vector signal source.
For the TDSCDMA/GSM bimodule mobile communication terminal is an example, comprise three types filter with the mobile communication terminal in this filter array:
Shared filter, for two kinds of patterns institutes of TDSCDMA and GSM shared;
The GSM special filter is the filter of GSM mode-specific; With
The TDSCDMA special filter is the filter of TDSCDMA mode-specific.
Certainly, the filtering that is used for upward signal that the filter in the filter array has, the filtering that is used for downstream signal that has, what have is used for bidirectional filtering, also has direct-connected path.
Consider autgmentability, set up the external interface that also is provided with filter in the module, so that verify the enforcement of demand temporarily at first passage.
In specific embodiment of the present invention; Second channel is set up module and is comprised fixed attenuator and direct-connected radio frequency cable; Wherein, fixed attenuator is used for guaranteeing that comprehensive test instrument and terminal equipment transmit and receive signal power in the scope of the correct test of instrument side at test process.
In specific embodiment of the present invention, as shown in Figure 3, third channel is set up module and is comprised:
Power splitter is used for the input/output terminal of radio-frequency channel simulator, makes the channel simulator passage that abundant path is provided;
Mixer is used for the road of closing of uplink downlink;
Isolator places after the down link radio-frequency channel simulator output, prevents that the channel simulator reverse signal is excessive instrument is worked the mischief.
Fixed attenuator guarantees that the upward signal of input comprehensive test instrument needn't be too big;
Set up module at passage and set up corresponding TCH test channel, test accessory channel, conventionally test and call out after passage and performance test call out passage, carry out the selection and the conducting of passage, be elaborated in the face of each channel selecting module down by channel selecting module.
As shown in Figure 4, first passage is selected module, and interface channel is set up module and TDSCDMA/GSM bimodule mobile communication terminal or power meter, comprising:
The first single-pole double throw RF switch SPDT1 is used for power meter and bimodule mobile communication terminal and selects one of which to be connected to the main line port of arrowband directional coupler;
The second single-pole double throw RF switch SPDT2 is used for that second channel is set up module fixed attenuator link and straight-through radio frequency cable link selection one of which is connected to one of selection mouth of single-pole double throw RF switch SPDT3;
The 3rd single-pole double throw RF switch SPDT3, SPDT2 and third channel set up module and select one of which to be connected to two of mixer to close one of road port;
The straight-through link port synthetic one tunnel that mixer, SPDT1 public port and first passage are set up module is connected with arrowband directional coupler coupling aperture;
The arrowband directional coupler; Two main line ports are connected its coupled end with the public port of said SPDT1 public port and RF switch SPnT respectively and are connected with the mixer common port, and the coupling aperture of coupling bimodule mobile communication terminal signal is connected with the common port of mixer;
The straight-through link port synthetic one tunnel that mixer, SPDT3 public port and first passage are set up module is connected with arrowband directional coupler coupling aperture;
Hilted broadsword is thrown RF switch SPnT more, selects first passage to set up in n the filter array of module the main road port that a filter is connected to the arrowband directional coupler.
And second channel selects module and third channel to select module to be radio-frequency switch array, wherein:
It is that a hilted broadsword is thrown RF switch SPnT and a single-pole double throw RF switch SPDT more that second channel is selected module, and one of test instrumentation that SPDT is used for selecting tone signal source or VSA is connected with filter of n filter array;
Third channel selects module to comprise two single-pole double throw RF switch and a DPDT RF switch composition; Wherein the DPDT RF switch is used to select the input/output port and the delivery outlet of one of GSM comprehensive test instrument or TD-SCDMA comprehensive test instrument; The input and output common port is connected with the first single-pole double throw RF switch common port, and the output common port is connected with the downlink that third channel is set up module; Two of second single-pole double throw RF switch select mouthful to set up that the fixed attenuator link is connected with straight-through radio frequency cable link in the module, be used to select one of them to set up the path of module as second channel with second channel; Two of first single-pole double throw RF switch select mouth to be connected with the second single-pole double throw RF switch common port with the uplink that third channel is set up module respectively;
Second channel selects module to set up the conducting of respective filter path and test instrumentation in the filter array according to test item; As when carrying out the test of the up transmit scattering of certain frequency range under the GSM pattern, should conducting vector analysis appearance and the filter path of forming this TCH test channel; And when testing descending band external blocking RF index test item, should conducting tone signal source and corresponding filter path.
Third channel is selected module; Be used for the selection of comprehensive test instrument mode port when setting up comprehensive test instrument and second channel and set up module or third channel and set up being connected of module according to the wireless radio frequency index test item; As calling out the RF single port that passage should be selected comprehensive test instrument for conventionally test; And call out passage for performance test, select the RF dual-port of comprehensive test instrument.
Method of the present invention comprises: wireless radio frequency index and testing performance index method, thick calibration steps and wireless radio frequency index and testing performance index method comprise:
Be further elaborated in the face of wireless radio frequency index method of testing of the present invention down.
As shown in Figure 5, wireless radio frequency index of the present invention and testing performance index method comprise:
With condition of different wireless radio frequency index of the present invention and testing performance index method are further elaborated below.
< one>the conventional wireless radio frequency index test of up emission
Because the conventional wireless radio frequency index test of up emission can be undertaken by comprehensive test instrument; VSA also can carry out; So measured simultaneously by the two, and then judge the accuracy of test results according to two measurement results, its process is described below; Comprise comprehensive test instrument test process and vector analysis appearance test process, wherein:
The comprehensive test instrument test process comprises:
According to test item, select second channel to set up the link of wherein link of module as the test call passage; Set up the link that module is selected according to second; The control third channel is selected 2 SPDT of module and SPDT0, SPDT1 and the SPDT2 of first passage selection module; Realization TDSCDMA/GSM bimodule mobile communication terminal is set up being connected of module with comprehensive test instrument RF single port with second channel, sets up the test call passage;
Suitable comprehensive test instrument parameter is set, and operation comprehensive test instrument and TDSCDMA/GSM bimodule mobile communication terminal utilize comprehensive test instrument to accomplish the conventional wireless radio frequency index test of up emission.
And vector analysis appearance test process comprises:
According to test item, select first passage to set up the respective filter link of module; Set up the link that module is selected according to first passage; The control first passage is selected the SPnT of module and SPnT and the SPDT that second channel is selected module; Realization TDSCDMA/GSM bimodule mobile communication terminal, first passage are set up being connected of module and vector analysis appearance, set up the TCH test channel of vector analysis appearance;
Suitable vector analysis instrument parameter is set, and the operating vector analyzer is accomplished the conventional wireless radio frequency index test of up emission.
Can compare the test result between the two at last, with the accuracy of validation test.
< two>the conventional wireless radio frequency index test of descending reception
The conventional wireless radio frequency index test of downlink specifically comprises the steps:
According to test item, select second channel to set up the link of wherein link of module as the test call passage; Set up the link that module is selected according to second; The control third channel is selected 2 SPDT of module and SPDT0, SPDT1 and the SPDT2 of first passage selection module; Realization TDSCDMA/GSM bimodule mobile communication terminal is set up being connected of module with comprehensive test instrument RF single port with second channel, sets up the test call passage;
Suitable comprehensive test instrument parameter is set, and operation comprehensive test instrument and TDSCDMA/GSM bimodule mobile communication terminal utilize comprehensive test instrument to accomplish the conventional wireless radio frequency index test of downlink.
< three>receive and dispatch spuious test, transmitting-receiving intermodulation and blocking test
Specifically comprise the steps:
Select second channel to set up the link of wherein link of module as the test call passage; Set up the link that module is selected according to second; The control third channel is selected 2 SPDT of module and SPDT0, SPDT1 and the SPDT2 of first passage selection module; Realization TDSCDMA/GSM bimodule mobile communication terminal, second channel are set up being connected of module and comprehensive test instrument RF single port, accomplish the foundation of test call passage.
According to test item, select first passage to set up the respective filter link of module; Set up the link that module is selected according to first passage; The control first passage is selected the SPnT of module and SPnT and the SPDT that second channel is selected module; Set up being connected of module and tone signal source if realize TDSCDMA/GSM bimodule mobile communication terminal, first passage; Then set up the subtest passage, the band external blocking is provided and receives the required interference signal of intermodulation testing; Set up being connected of module and VSA if realize TDSCDMA/GSM bimodule mobile communication terminal, first passage, then set up TCH test channel, accomplish spuious test of transmitting-receiving and emission intermodulation testing.In addition, the vector signal source connects the straight-through link that first passage is set up module, selects module to be connected to bimodule mobile communication terminal through first passage again, and band internal congestion and the required interference signal of emission intermodulation testing are provided.
Suitable comprehensive test instrument parameter is set, utilizes VSA to accomplish the spuious test of transmitting-receiving;
Suitable comprehensive test instrument parameter and vector signal source parameter are set, utilize VSA to accomplish the emission intermodulation testing; The parameter in suitable comprehensive test instrument parameter, vector signal source and tone signal source is set, utilizes VSA to accomplish and receive intermodulation testing.
Suitable comprehensive test instrument parameter and tone signal source parameter are set, utilize comprehensive test instrument to accomplish and receive the test of band external blocking; Suitable comprehensive test instrument parameter and vector signal source are set, utilize comprehensive test instrument to accomplish and receive the test of band external blocking.
< four>performance test
Performance test specifically comprises the steps:
Select third channel to set up the uplink downlink of module; The control first passage selects module and third channel to select module, and realization TDSCDMA/GSM bimodule mobile communication terminal, third channel are set up being connected of module and comprehensive test instrument RF dual-port, accomplish the foundation that passage is called out in performance test;
In addition, the vector signal source connects the straight-through link that first passage is set up module, selects module to be connected to bimodule mobile communication terminal through first passage again, provides performance test required AWGN interference signal.
Setting in conjunction with the required test environment of channel simulator;
Suitable vector signal source parameter, comprehensive test instrument parameter and channel simulator parameter are set, and operation comprehensive test instrument and TDSCDMA/GSM bimodule mobile communication terminal utilize comprehensive test instrument to accomplish testing performance index.
Description through above method and apparatus can find that the present invention has realized the wireless radio frequency index of multimode mobile communication terminal and the automation checking of performance index;
Simultaneously, because the up RF index test item of multimode mobile communication terminal has adopted the mode of comprehensive test instrument and the checking of VSA contrast test,, increased the reliability of system as replenishing and Redundancy Design before the TD-SCDMA comprehensive test instrument maturation;
In spuious test and obstruction link, utilized the very wide characteristics of arrowband directional coupler main line bandwidth, use cheap directional coupler to replace the broadband mixer of the costliness of using in the traditional design, reduced cost;
Utilized the built-in attenuator of radio frequency instrument and avoided the use of very expensive outside high-precision program control attenuator, it is considerable to practice thrift cost;
Made full use of TD time division duplex characteristic, made the partial test passage both can be used for receiver test in conjunction with the switching of RF switch and also can be used for the transmitter test, framework is effectively compact;
Except that comprehensive test instrument, all the other whole instrument all are that TD and GSM test can be public, have improved the instrument utilance;
Make full use of the synchronizing function of TDSCDMA spectrum signal analyzer, vector analysis appearance and terminal precise synchronization make test accurately and reliably when realizing the spuious and intermodulation of TDSCDMA system testing.
With condition of different calibration steps of the present invention is further elaborated below.
Adopt dual stage apparatus calibration strategy, that is: before device operation first, adopt the external network analyzer to carry out the smart calibration of passage, the link of smart calibration comprises all links of test call link, performance test call link and test or subtest link commonly used; Under general operating position, a certain or some link adopts the built-in power meter of device slightly to calibrate, and has reduced the alignment time greatly, can guarantee calibration accuracy again.
As shown in Figure 6, Calibration Method comprises:
According to the requirement of device calibration error, confirm the frequency and calibration number of thick calibration, the calibration number of the thick calibration of this link is with respect to the essence calibration much less of same link.
In thick calibration, slightly calibrating link has following two kinds of situation:
Calibration has the instrument of signal generator in the link, comprises tone signal source, vector signal source or comprehensive test instrument, and yes uses the signal generator in the link in their thick calibration;
Calibration does not have the instrument of signal generator in the link, and VSA is but arranged, and selects the signal generator of tone signal source as thick calibration.The difference of thick calibration link and calibration testing link just is insertion loss and the line loss of the radio frequency line that is connected with two instrument respectively of the SPDT two-way of second channel control module.Difference between them is accomplished when essence is calibrated.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (17)
1. a wireless radio frequency index verification apparatus that is used for multimode mobile communication terminal is characterized in that, comprising:
Passage is set up module, is used to set up a plurality of passages that are used to test;
Channel selecting module is used for according to the said multimode mobile communication terminal of wireless radio frequency index test item conducting, said passage and test instrumentation;
Wherein said channel selecting module specifically comprises:
First passage is selected module, is used for setting up according to the wireless radio frequency index test item one or more link conducting of mobile communication terminal and TCH test channel, test accessory channel, conventionally test calling passage and performance test calling passage;
Second channel is selected module, is used to set up first passage and sets up being connected of module and test instrumentation, sets up TCH test channel or tests accessory channel and the conducting of the test instrumentation of tone signal source, VSA according to the wireless radio frequency index test item;
Third channel is selected module, sets up second channel and sets up module or third channel and set up being connected of module and test instrumentation, is used for setting up the conducting that conventionally test is called out passage or performance test calling passage and comprehensive test instrument port according to the wireless radio frequency index test item;
This TCH test channel is used to connect vector analysis appearance and multimode mobile communication terminal; This test accessory channel provides descending acceptance test needed interference auxiliary signal to multimode mobile communication terminal; This conventionally test is called out passage and is set up being connected of comprehensive test instrument and multimode mobile communication terminal for test up-downgoing wireless radio frequency index; It is that test performance is set up being connected of comprehensive test instrument and multimode mobile communication terminal that passage is called out in this performance test.
2. device according to claim 1 is characterized in that, said multimode mobile communication terminal is GSM, TD-SCDMA bimodule mobile communication terminal.
3. device according to claim 1 is characterized in that, said passage is set up module and specifically comprised:
First passage is set up module, is used to set up said TCH test channel or said test accessory channel;
Second channel is set up module, is used to set up said conventionally test and calls out passage;
Third channel is set up module, is used to set up said performance test and calls out passage.
4. device according to claim 1 is characterized in that, said first passage selects module also to be used for the calibration that channel link is called out in auxiliary said TCH test channel, test accessory channel, conventionally test calling passage and performance test.
5. device according to claim 3 is characterized in that, it is filter array and straight-through link that said first passage is set up module, and wherein said straight-through link is connected with the vector signal source.
6. device according to claim 3 is characterized in that, said second channel is set up module and comprised fixed attenuator path and straight-through radio frequency cable link.
7. device according to claim 1 is characterized in that, said first passage selects module to comprise:
First single-pole double throw RF switch is used for power meter and multimode mobile communication terminal and selects one of which to be connected to the main line port of arrowband directional coupler;
Second single-pole double throw RF switch is used for that second channel is set up module fixed attenuator link and straight-through radio frequency cable link selection one of which is connected to one of selection mouth of the 3rd single-pole double throw RF switch;
The 3rd single-pole double throw RF switch closes one of road port from what second single-pole double throw RF switch and third channel set up that module selects that one of which is connected to mixer;
Mixer, the straight-through link port synthetic a tunnel of the 3rd single-pole double throw RF switch public port and first passage being set up module is connected with arrowband directional coupler coupling aperture;
The arrowband directional coupler, two main line ports are connected with the public port that the public port and the hilted broadsword of said first single-pole double-throw switch (SPDT) are thrown RF switch more respectively, and its coupled end is connected with the mixer common port;
Hilted broadsword is thrown RF switch more, selects first passage to set up in the filter array of module the main road port that a filter is connected to the arrowband directional coupler.
8. device according to claim 1; It is characterized in that; Said second channel selects module to comprise that a hilted broadsword throws RF switch and a single-pole double throw RF switch more, and one of test instrumentation that single-pole double throw RF switch is used for selecting tone signal source or VSA is connected with filter of filter array.
9. device according to claim 1; It is characterized in that; Said third channel selects module to comprise two single-pole double throw RF switch and a DPDT RF switch; Wherein the DPDT RF switch is used to select the input and output common port and output common port of one of GSM comprehensive test instrument or TD-SCDMA comprehensive test instrument, and the input and output common port is connected with the common port of first single-pole double throw RF switch, and the output common port is connected with the downlink that third channel is set up module; Two of second single-pole double throw RF switch select mouthful to set up that the fixed attenuator link is connected with straight-through radio frequency cable link in the module, be used to select one of them to set up the path of module as second channel with second channel; Two selection mouths of first single-pole double throw RF switch set up the uplink of module with third channel respectively and the common port of second single-pole double throw RF switch is connected.
10. device according to claim 3 is characterized in that, said third channel is set up module and comprised:
Two power splitters are connected with the input/output terminal of radio-frequency channel simulator;
Mixer is used for the road of closing of uplink downlink;
Isolator is arranged between the power splitter and mixer of down link.
Fixed attenuator is connected with mixer.
11. a wireless radio frequency index verification method that is used for multimode mobile communication terminal is applicable to wireless radio frequency index verification apparatus, said device comprises that passage sets up module and channel selecting module, it is characterized in that said method comprises:
Steps A according to the demand of wireless radio frequency index test item, is utilized passage to set up module and is set up the required a plurality of passages of test;
Step B selects module according to the demand control channel of wireless radio frequency index test item, and realization multimode mobile communication terminal, passage are set up the passage of module and the connection between the test instrumentation;
Step C is provided with the parameter of test instrumentation, utilizes the wireless radio frequency index of test instrumentation through said lane testing multimode mobile communication terminal,
Wherein said step B may further comprise the steps:
Set up the one or more link conducting in mobile communication terminal and TCH test channel, test accessory channel, conventionally test calling passage and the performance test calling passage according to the wireless radio frequency index test item;
Set up the conducting of the test instrumentation of TCH test channel or test accessory channel and tone signal source, VSA according to the wireless radio frequency index test item; And
Set up the conducting that conventionally test is called out passage or performance test calling passage and comprehensive test instrument port according to the wireless radio frequency index test item,
Wherein, this TCH test channel is used to connect vector analysis appearance and multimode mobile communication terminal; This test accessory channel provides descending acceptance test needed interference auxiliary signal to multimode mobile communication terminal; This conventionally test is called out passage and is set up being connected of comprehensive test instrument and multimode mobile communication terminal for test up-downgoing wireless radio frequency index; It is that test performance is set up being connected of comprehensive test instrument and multimode mobile communication terminal that passage is called out in this performance test.
12. method according to claim 11 is characterized in that, said multimode mobile communication terminal is GSM, TDSCDMA bimodule mobile communication terminal.
13. method according to claim 11 is characterized in that, when said wireless radio frequency index test item is the test of the conventional wireless radio frequency index of the up emission of TDSCDMA, compares measurement simultaneously by comprehensive test instrument and VSA.
14. method according to claim 11 is characterized in that, also comprises:
The thick step of calibrating of passage is carried out in test call link commonly used, performance test call link and test or subtest link; And/or
Before device operation first, adopt the step of carrying out passage smart calibration of external network analyzer to test call link, performance test call link and test or subtest link commonly used;
Wherein, the link of smart calibration comprises all links of said test call link commonly used, performance test call link and test or subtest link; Under special operating position, a certain or some link adopts the built-in power meter of device slightly to calibrate.
15. method according to claim 14, its characteristic exists, and said thick calibration steps specifically comprises:
Step 61 according to the thick alignment requirements of link, is confirmed device to the calibration error requirement, according to the requirement of device calibration error, confirms the frequency and calibration number of thick calibration;
Step 62 according to the thick alignment requirements of this link, is set up the calibration testing link, selects corresponding passage to set up module and appropriate signal generator;
Step 63 is set up module and signal generator according to passage, and control channel is selected module, and realization signal generator, passage are set up the connection between module and the power meter;
Step 64 is tested the calibration testing link load that each signal generator, channel are set up module and power meter, compensates according to the difference of thick calibration link and calibration testing link, is slightly calibrated the calibration value of link.
16. method according to claim 15 is characterized in that, said smart calibration is specially:
Step 65 according to each frequency calibration value of thick calibration, is calculated the difference of calibration of identical frequency essence and thick calibration, and with the offset of this difference as this frequency range, smart calibration value adds the calibration of offset completion link.
17. method according to claim 11 is characterized in that,
The passage that said steps A is set up comprises with lower channel or its combination: TCH test channel, test accessory channel, conventionally test are called out passage, passage is called out in performance test.
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| CN108282233A (en) * | 2017-01-03 | 2018-07-13 | 中国移动通信有限公司研究院 | A kind of calibration matrix device that test system is calibrated |
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