CN102710340A - System and method for testing receiving sensitivity of data terminal - Google Patents
System and method for testing receiving sensitivity of data terminal Download PDFInfo
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- CN102710340A CN102710340A CN2011100755578A CN201110075557A CN102710340A CN 102710340 A CN102710340 A CN 102710340A CN 2011100755578 A CN2011100755578 A CN 2011100755578A CN 201110075557 A CN201110075557 A CN 201110075557A CN 102710340 A CN102710340 A CN 102710340A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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Abstract
The invention discloses a system for testing the receiving sensitivity of a data terminal. The system comprises a muffling microwave darkroom, test control equipment, a tested data terminal and a universal serial bus (USB) cable, wherein the test control equipment is put on a ground in the muffling microwave darkroom, covered by a wave absorption material and used for supplying power to the tested data terminal and controlling a working state and a working mode of the tested data terminal; the USB cable is a metal core shielding cable and used for connecting the test control equipment and the tested data terminal; and the total isotropic sensitivity (TIS) of the tested data terminal is measured. The invention also discloses a method for testing the receiving sensitivity of the data terminal. By adopting the system and the method, the influence of the test control equipment on a test result can be avoided, so that the test result is reliable; and therefore, the performance of different types of data terminals can be fairly and effectively compared according to the test result.
Description
Technical field
The present invention relates to the test and the Performance Evaluation technology of wireless communications products, be meant a kind of test macro and method of data terminal receiving sensitivity especially.
Background technology
Along with the develop rapidly of radiotechnics, the kind of wireless communications products is more and more, comprising: the notebook computer of voice-and-data wireless handheld terminal and all kinds of internal or external wireless connections equipment etc.Good receptivity is to guarantee the key of all kinds of wireless communications products communication qualities, therefore, needs to adopt spacial radio frequency performance test and through performance test index to weigh the quality of wireless communications products.Wherein, Total isotropism receiving sensitivity (TIS; Total Isotropic Sensitivity) be to eat dishes without rice or wine to reflect one of most important index that equipment under test (DUT, Device Under testing) actual reception signal performance is good and bad in (OTA, Over The Air) radio frequency testing.Performance requirement when guaranteeing that DUT can satisfy work requires the TIS value of DUT must be lower than the threshold value of regulation.
At present, the whole world has how tame normal structure all deep research to be carried out in OTA test, and has formulated corresponding standard.For example: U.S.'s radio communication and internet society (CTIA), worldwide interoperability for microwave insert forum (Worldwide Interoperability for Microwave Access), third generation partner program (3GPP; The 3rd Generation Partnership Project) and the standard formulated of China's Telecommunication's ANSI (CCSA, China Communications Standards Association).In established standard, comparatively perfect for the OTA method of testing of singly going into singly (SISO, Single-Input Single-Output) single antenna hand-held wireless communication product such as mobile phone terminal and standard.But, all still be blank about the OTA method of testing and the standard of data terminal such as data card etc.
In sum, the present technical scheme that does not also have about the OTA method of testing of data terminal.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of test macro and method of data terminal receiving sensitivity, can obtain accurate, reliable test result, and then can carry out justice, compare effectively the performance at different types of data terminal.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of test macro of data terminal receiving sensitivity, comprising: noise elimination microwave dark room, test are with control appliance and measured data terminal, and this system also comprises: USB (USB, Universal Serial Bus) cable; Wherein,
Control appliance is used in test, is positioned on the ground of noise elimination microwave dark room, and is covered by absorbing material, is used to the power supply of measured data terminal, and the operating state and the pattern at control measured data terminal;
USB cable is metal-cored shielded type cable, is used for connecting test with control appliance and measured data terminal;
The measured data terminal is used for being carried out TIS and measures.
In the such scheme, the length of said USB cable is less than 3 meters.
In the such scheme, said USB cable is on every side around inhaling the ripple foam.
In the such scheme, said measured data terminal is fixed on the support of the turntable central authorities in the said noise elimination microwave dark room.
The present invention also provides a kind of method of testing of data terminal receiving sensitivity, and this method comprises:
Test is positioned on the ground of noise elimination microwave dark room with control appliance, and covers with absorbing material; Connect test with control appliance and measured data terminal through USB cable; Wherein, said USB cable is metal-cored shielded type cable;
Test uses control appliance to be the power supply of measured data terminal through said USB cable, and the operating state and the pattern at control measured data terminal, carries out TIS afterwards and measures.
The test macro of data terminal receiving sensitivity provided by the invention and method are positioned over test on the ground of noise elimination microwave dark room with control appliance, and are covered by absorbing material; Adopt USB cable to connect test and carry out the TIS measurement with control appliance and measured data terminal.So, when carrying out the TIS measurement, can avoid test test result is exerted an influence, thereby make the test result that obtains accurate, reliable, and then can utilize test result that the performance at different types of data terminal is carried out justice, compared effectively with control appliance.
In addition, the USB cable among the application adopts metal-cored shielded type cable, can avoid extraneous noise signal that test result is caused interference; Among the application, around USB cable,, so, can further avoid the interference of USB cable, thereby further guarantee reliability of testing result noise elimination darkroom test environment around inhaling the ripple foam.
Description of drawings
Fig. 1 is the test system structure sketch map of data terminal receiving sensitivity of the present invention;
Fig. 2 is the method for testing schematic flow sheet of data terminal receiving sensitivity of the present invention;
Fig. 3 is the existing TIS spheric coordinate system sketch map when measuring.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is remake further detailed explanation.
The test macro of data terminal receiving sensitivity provided by the invention, as shown in Figure 1, this system comprises: noise elimination microwave dark room 11, test are with control appliance 12, USB cable 13 and measured data terminal 14; Wherein,
Dispose equipment such as vector net analysis appearance, spectrum analyzer, comprehensive test instrument, base station simulator, turntable in the noise elimination microwave dark room 11, for the TIS measurement at measured data terminal 14 provides environment;
Test is positioned on the ground of noise elimination microwave dark room 11 with control appliance 12, and is covered by absorbing material 15, is used to 14 power supplies of measured data terminal, and the operating state and the pattern at control measured data terminal 14; Here, test can be adopted notebook computer with control appliance 12;
Measured data terminal 14 is fixed on the support 16 of turntable central authorities, is used for being carried out TIS and measures.
Here, noise elimination microwave dark room 11 is identical with the configuration of the noise elimination microwave dark room of existing TIS measuring system, repeats no more here.Said absorbing material 15 can be any one in the existing absorbing material.
The use scene of said data terminal such as data card and hand-held type of wireless terminal such as mobile phone terminal exists than big-difference: at first, data card need be connected on the notebook computer through data-interface, thereby wireless access function is provided for notebook computer; Secondly, notebook computer is mixed with dielectric material by metal and constitutes, because notebook computer is positioned at the near-field region of the antenna of data card, and therefore can be to antenna pattern, transmitting power and the bigger influence of TIS generation of the antenna of data card; And for dissimilar notebook computers, its size and material constitute and all be not quite similar, and be corresponding, and the antenna pattern of the antenna of data card and the influence of TIS are also had nothing in common with each other; The 3rd, contain a large amount of high speed integrated circuits on the mainboard of notebook computer, the wave frequency of the operating frequency of high speed integrated circuit and the aerial radiation of data card is very approaching, and this background electromagnetic noise is also very big to the influence of the TIS of data card.
For these reasons, make configuration relation between data card and the notebook computer, such as: data card is connected to the direct relative position of different USB ports or data card and notebook computer, all can influence the test result of data card.So, to compare with a hand-held type wireless terminal, data terminal can receive the influence of more extraneous factors, makes that its TIS test result is very responsive to test environment, so, causes the repeated relatively poor of test result; In addition, because also possibly there is bigger difference in the notebook computer of same type to the influence of different pieces of information card, therefore, be difficult to the properties of product of different pieces of information card are compared effectively from the test result of TIS.Through above-mentioned analysis; In practical application through USB cable with measured data terminal 14 be connected to the test with control appliance 12 as on the notebook computer; Can make measured data terminal 14 away from the test with control appliance 12, thereby the test result of avoiding as much as possible testing with 12 pairs of measured data terminals 14 of control appliance exerts an influence.
When carrying out the signal transmission, because USB cable 13 can cause decay to signal strength signal intensity, add that the height of existing turntable is generally 1.3～1.5 meters, therefore, the length of suggestion USB cable 13 is less than 3 meters.And, impact for fear of 13 pairs of test environments of USB cable, and then influence test result, can be further around USB cable 13 around inhaling ripple foam 17, wherein, said suction ripple foam 17 can be any one in the existing suction ripple foam.
Can be in the existing metal-cored shielded type cable any one as the metal-cored shielded type cable of USB cable 13, adopt the tinfoil paper shielded type cable, so, can guarantee reliability of testing result through experiment showed, suggestion.
The fixed form that the central fixed form that is adopted of turntable can adopt equipment under test in the various TIS measuring systems is fixed at measured data terminal 14.
Based on said system, the present invention also provides a kind of method of testing of data terminal receiving sensitivity, and is as shown in Figure 2, and this method may further comprise the steps:
Step 201: will test with control appliance being positioned on the ground of noise elimination microwave dark room, and cover with absorbing material; Connect test with control appliance and measured data terminal through USB cable; Wherein, said USB cable is metal-cored shielded type cable;
Wherein, test can be a notebook computer with control appliance; The measured data terminal is fixed on the support of turntable central authorities.
Step 202: test uses control appliance to be the power supply of measured data terminal through USB cable, and the operating state and the pattern at control measured data terminal, carries out TIS afterwards and measures.
Here, the operating state and the pattern at said control measured data terminal are meant: test gets into operating state with control appliance control measured data terminal, and concrete processing procedure can adopt existing processing procedure.
When carrying out the TIS measurement, data terminal can be called out through the AT order, sets up wireless calling with base station simulator and is connected, and carries out TIS and measures.Wherein, carry out the processing procedure that concrete processing procedure that TIS measures can adopt existing TIS to measure.
When measuring, existing AT commonly used orders as follows:
At+cfun=5, expression activates SIM;
At+cfun=1, the expression registered network after base station simulator is replied OK, postpones to wait for about 10 seconds, then to base station simulator report network state.Wherein,, then show to be registered to network and to be the local user,, then show to be registered to network and to be roaming state if report creg:5 if report creg:1;
At+csg, the expression detection signal strength.
The TIS measurement is on the sphere that is the center of circle, to get a test with the equipment under test, and its spheric coordinate system is as shown in Figure 3.On first rotating shaft or second rotating shaft that equipment under test is positioned over; That is: turntable is central; Said first rotating shaft is the Z axle; The rotating range of said first rotating shaft is the 0-180 degree, representes the anglec of rotation of first rotating shaft with θ, and said second rotating shaft is the X axle; The said second rotating shaft rotating range is the 0-360 degree, the anglec of rotation of expression second rotating shaft with
.
When measuring; θ and
are whenever got a test point at a distance from fixed step size number of degrees at 0-180 degree and 0-360 degree respectively; Because Space Angle such as test point is are chosen, so its right and wrong on sphere are equally distributed.With the signal strength signal intensity of all test points according to formula:
calculates, and can obtain the TIS value of equipment under test.
Wherein, n and m represent respectively θ with
Total number of test points on the direction is by the step-length number of degrees decision of being got; (θ
i, φ
j) expression a certain specific test point, this test point θ with
Numbering on the direction is respectively i and j; EIS
θ(θ
i, φ
j) and EIS
φ(θ
i, φ
j) be illustrated respectively in test point (θ
i, φ
j) measure effectively each to receiving sensitivity the θ direction with
Component on the direction; N
LThe fixing coefficient that the surface integral computing obtains is simplified in expression.Here, for two test points of θ=0 and θ=180, because its sine value is zero, so, these two points are not measured.
When the test data terminal; Adopt identical with existing TIS measurement point mode and the computational methods of getting; When measuring; The signal strength signal intensity of detected each point is carried out record, and be transferred to next test point, after treating all to test signal strength signal intensity along all test points of θ and
direction; Calculate according to above-mentioned formula, can obtain the TIS value at measured data terminal.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (8)
1. the test macro of a data terminal receiving sensitivity comprises: noise elimination microwave dark room, test is characterized in that this system also comprises: USB (USB) cable with control appliance and measured data terminal; Wherein,
Control appliance is used in test, is positioned on the ground of noise elimination microwave dark room, and is covered by absorbing material, is used to the power supply of measured data terminal, and the operating state and the pattern at control measured data terminal;
USB cable is metal-cored shielded type cable, is used for connecting test with control appliance and measured data terminal;
The measured data terminal is used for being carried out total isotropism receiving sensitivity (TIS) and measures.
2. system according to claim 1 is characterized in that the length of said USB cable is less than 3 meters.
3. system according to claim 1 and 2 is characterized in that, said USB cable is on every side around inhaling the ripple foam.
4. system according to claim 1 is characterized in that, said measured data terminal is fixed on the support of the turntable central authorities in the said noise elimination microwave dark room.
5. the method for testing of a data terminal receiving sensitivity is characterized in that, this method comprises:
Test is positioned on the ground of noise elimination microwave dark room with control appliance, and covers with absorbing material; Connect test with control appliance and measured data terminal through USB cable; Wherein, said USB cable is metal-cored shielded type cable;
Test uses control appliance to be the power supply of measured data terminal through said USB cable, and the operating state and the pattern at control measured data terminal, carries out TIS afterwards and measures.
6. method according to claim 5 is characterized in that the length of said USB cable is less than 3 meters.
7. according to claim 5 or 6 described methods, it is characterized in that said USB cable is on every side around inhaling the ripple foam.
8. method according to claim 5 is characterized in that, said measured data terminal is fixed on the support of the turntable central authorities in the said noise elimination microwave dark room.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100755578A CN102710340A (en) | 2011-03-28 | 2011-03-28 | System and method for testing receiving sensitivity of data terminal |
| PCT/CN2011/077536 WO2012129869A1 (en) | 2011-03-28 | 2011-07-25 | System and method for testing receiving sensitivity of data terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100755578A CN102710340A (en) | 2011-03-28 | 2011-03-28 | System and method for testing receiving sensitivity of data terminal |
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|---|---|---|---|---|
| CN108599877A (en) * | 2018-04-13 | 2018-09-28 | 上海剑桥科技股份有限公司 | Total omnidirectional sensitivity performance estimating method |
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| CN105227728B (en) * | 2015-08-26 | 2018-09-04 | 努比亚技术有限公司 | Signal-testing apparatus and method |
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| CN2615674Y (en) * | 2003-04-28 | 2004-05-12 | 联想(北京)有限公司 | Detecting apparatus used for electromagnetic compatible darkroom detecting system |
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| CN101415194A (en) * | 2007-10-18 | 2009-04-22 | 中兴通讯股份有限公司 | System and method for testing network card coupling |
| CN101217323A (en) * | 2008-01-16 | 2008-07-09 | 中兴通讯股份有限公司 | A test system and test method on aerial performance of wireless USB modem |
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| CN108599877A (en) * | 2018-04-13 | 2018-09-28 | 上海剑桥科技股份有限公司 | Total omnidirectional sensitivity performance estimating method |
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Application publication date: 20121003 |