CN102695198B - The radio test method of a kind of mobile terminal GPS and system - Google Patents
The radio test method of a kind of mobile terminal GPS and system Download PDFInfo
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Abstract
The present invention discloses radio test method and the system of a kind of mobile terminal GPS.The present invention obtains the average background noise value of mobile terminal in advance, again by carrying out OTA test in a hardware environment with low cost, according to the GPS that test obtains? NMEA? the anglec of rotation in log information and each moment of mobile terminal obtains the average signal-to-noise ratio value of mobile terminal, and after calibration by average background noise value, the final radio sensitivity obtaining tested mobile terminal.The present invention gets final product the simple hardware test environment of building structure by a small amount of input, and obtains the radio sensitivity of mobile terminal by a series of step, thus assesses mobile terminal GPS receptivity and true serviceability quantitatively.
Description
Technical field
The present invention relates to mobile terminal field of GPS test, particularly relate to radio test method and the system of a kind of mobile terminal GPS.
Background technology
Nowadays increasing mobile phone is with GPS/AGPS (AssistedGPS, assistant GPS) function, and also constantly increases based on the application and service of this function.Therefore, the method for testing that can quantize the true serviceability of mobile terminal GPS/AGPS is urgently found in mobile operator and device fabrication commercial city.But up to date, 3GPP (the3rdGenerationPartnershipProject, third generation partner program) its emphasis of method of testing of defining or the conductive performance of GPS/AGPS, and do not comprise antenna, this the method for testing paying close attention to conductive performance can not truly reflect GPS/AGPS serviceability, because mobile phone terminal GPS in use, its gps antenna also directly can have influence on the GPS receptivity of this mobile terminal.Desirable GPS/AGPS performance test must comprise terminal all component, and wireless (OverTheAir, hereinafter referred to as OTA) test is exactly solution best at present.The testing standard " CTIATestP1anforMobileStationOvertheAirPerformance " that CTIA (U.S.'s radio communication and internet society) issues adds the test definition of GPS/AGPOTA from 3.0 versions (issue on April 30th, 2009), but set up this test environment, need very high input, test process is complicated, the mechanism for testing of minority is only had to build the test environment meeting up-to-date " CTIATestPlanforMobileStationOvertheAirPerformance3.1 " (in January, 2011 issue) at present, and the manufacturer terminals such as general mobile phone can not select to build this test environment, but wish again the GPS receptivity quantizing oneself product of test.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide radio test method and the system of a kind of mobile terminal GPS, the problem such as the wireless test cost being intended to solve existing mobile terminal GPS is high, test process is complicated.
Technical scheme of the present invention is as follows:
A radio test method of mobile terminal GPS, for obtaining the radio sensitivity of mobile terminal, wherein, comprises step:
A, in advance conduction test is carried out to mobile terminal, obtain the average background noise value of this mobile terminal;
B, described mobile terminal is placed on the wireless test carrying out different rotary angle in microwave dark room, and the GPS communications protocol information that Real-time Obtaining mobile terminal generates when receiving gps signal under different rotary angle case, and the anglec of rotation in each moment of record move terminal;
C, according to described GPS communications protocol information and the anglec of rotation in each moment of mobile terminal, generate the average signal-to-noise ratio value of mobile terminal, and by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result.
Described radio test method, wherein, described steps A specifically comprises:
The antenna feed point of A1, described mobile terminal and a gps signal generator wired connection;
The correspondence relationship information of A2, the signal strength signal intensity of acquisition gps signal generator and the snr value at antenna feed point place;
A3, obtain the average background noise value of mobile terminal according to the correspondence relationship information of described signal strength signal intensity and snr value.
Described radio test method, wherein, in described steps A, is connected the antenna feed point of mobile terminal with the cable line of gps signal generator by 50 Ω.
Described radio test method, wherein, the GPS communications protocol information in described step B comprises: GPS locating information and visible satellite information; Described GPS locating information comprises the UTC time of the time synchronized for making time in GPS communications protocol information and wireless test, and described visible satellite information comprises the snr value that mobile terminal receives.
Described radio test method, wherein, during the GPS communications protocol information generated when Real-time Obtaining mobile terminal receives gps signal under different rotary angle case, resetting the UTC time is zero point, and is stepping timing with second.
Described radio test method, wherein, in described step B, the anglec of rotation in each moment of mobile terminal comprises mobile terminal and arrives a test position to Phi, Theta angle value corresponding to the time period and described time period of leaving this test position.
Described radio test method, wherein, the time of staying of described mobile terminal on a test position is 10 seconds.
Described radio test method, wherein, described step C specifically comprises:
C1, snr value when to obtain mobile terminal different rotary angle according to described GPS communications protocol information and the anglec of rotation in each moment of mobile terminal;
C2, obtain the average signal-to-noise ratio value of mobile terminal according to snr value during mobile terminal different rotary angle, and by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result.
Described radio test method, wherein, described step C2 specifically comprises:
C21, obtain the average signal-to-noise ratio value in mobile terminal Phi=0 degree face and Theta=90 degree face according to snr value during mobile terminal different rotary angle;
C22, obtain the average signal-to-noise ratio value of mobile terminal according to the average signal-to-noise ratio value in mobile terminal Phi=0 degree face and Theta=90 degree face;
C23, by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result.
A wireless test system of mobile terminal GPS, for obtaining the radio sensitivity of mobile terminal, wherein, comprising:
Microwave dark room, for carrying out the wireless test of different rotary angle to mobile terminal;
Gps signal generator, for sending gps signal continuously in microwave dark room, also for carrying out the average background noise value that conduction test obtains this mobile terminal to mobile terminal;
PC holds, the GPS communications protocol information generated when receiving gps signal for Real-time Obtaining mobile terminal under different rotary angle case, and the anglec of rotation in each moment of record move terminal, generate the average signal-to-noise ratio value of mobile terminal, and by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result;
Described microwave dark room, gps signal generator are held with PC respectively and are connected.
Described wireless test system, wherein, comprises a quadrature dualpolarized antenna for being propagated with circularly polarised wave form by gps signal in described microwave dark room.
Described wireless test system, wherein, described quadrature dualpolarized antenna connects a phase shifter and the second attenuator, and described phase shifter and the second attenuator are also connected with a power splitter, described power splitter connects one first attenuator, and described first attenuator connects described gps signal generator; Described gps signal generator, the first attenuator, the second attenuator and quadrature dualpolarized antenna control by described PC end, and described PC end controls the anglec of rotation of mobile terminal by a revolving table position controller;
Gps signal is sent to the first attenuator by described gps signal generator, adjustment through described first attenuator is sent to power splitter, described power splitter is divided into the first via and the second road gps signal through gps signal, first via gps signal produces 90 degree of phase shifts through phase shifter, and the second road gps signal is fed into quadrature dualpolarized antenna after the adjustment of the second attenuator together with first via gps signal.
The radio test method of a kind of mobile terminal GPS provided by the invention and system, obtain the average background noise value of mobile terminal in advance, again by carrying out OTA test in a hardware environment with low cost, the GPSNMEAlog information obtained according to test and testing time and mobile terminal locations correspondence relationship information obtain the average signal-to-noise ratio value of mobile terminal, and after calibration by average background noise value, the final radio sensitivity obtaining tested mobile terminal.The present invention gets final product the simple hardware test environment of building structure by a small amount of input, and obtains the radio sensitivity of mobile terminal by a series of simple and easy step, thus assesses mobile terminal GPS receptivity and true serviceability quantitatively.
Accompanying drawing explanation
Fig. 1 is the flow chart of the radio test method preferred embodiment of mobile terminal GPS of the present invention.
Fig. 2 is the structure chart of conduction test in method shown in Fig. 1.
Fig. 3 is the structure chart of the wireless test system preferred embodiment of mobile terminal GPS of the present invention.
Fig. 4 is the test setting information in the present invention in csv file.
Fig. 5 is the synchronous signal information in the present invention in csv file.
Fig. 6 is for obtaining the flow chart of mobile terminal radio sensitivity in method shown in Fig. 1.
Embodiment
The invention provides radio test method and the system of a kind of mobile terminal GPS, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The radio test method of mobile terminal GPS of the present invention and system, in microwave dark room, gps signal is received by making mobile terminal, and the GPSNMEAlog information (NMEA that extract real-time record move terminal generates, NationMarineElectronicsAssociation, the widely used consensus standard of GPS before feeling the pulse with the finger-tip, hereinafter referred to as GPSNMEAlog information), and, the anglec of rotation in each moment of mobile terminal, according to described GPSNMEAlog information and the anglec of rotation in each moment of mobile terminal, obtain the average signal-to-noise ratio value of mobile terminal, and calibrated by the mobile terminal average background noise value obtained in advance, thus calculate mobile terminal radio sensitivity TIS, reach the object of quantitative evaluation mobile terminal GPS receptivity.
The radio test method of mobile terminal GPS of the present invention, as shown in Figure 1, it comprises step:
S101, in advance conduction test is carried out to mobile terminal, obtain the average background noise value of this mobile terminal;
S102, described mobile terminal is placed on the wireless test carrying out different rotary angle in microwave dark room, and the GPSNMEAlog information that Real-time Obtaining mobile terminal generates when receiving gps signal under different rotary angle case, and the anglec of rotation in each moment of record move terminal;
S103, according to described GPSNMEAlog information and the anglec of rotation in each moment of mobile terminal, generate the average signal-to-noise ratio value of mobile terminal, and by obtaining test result after the calibration of described average background noise value, according to the radio sensitivity of this test result mobile terminal.
In step S101, the average background noise value of mobile terminal obtains by conduction test, its objective is the C/N in order to calibration testing obtains
0(snr value) value.Embodiment can be: as shown in Figure 2, gps signal generator 170 is connected in the antenna feed point of mobile terminal 120, such as utilize the Cable line (electric wire) of 50 Ω, one end connects in the antenna feed point of mobile terminal 120 mainboard, the other end connects on gps signal generator 170, to carry out conduction test to mobile terminal.
As shown in Table 1, first row signal strength signal intensity is wherein gps signal generator power output, secondary series C/N in test result citing
0the snr value of value for obtaining at antenna feed point conduction test, comparatively it is suitable that, this C/N
0the mean value that value obtains for 10 conduction tests, the 3rd row are wherein then for signal strength signal intensity deducts C/N
0value gained difference, finally counts signal strength signal intensity and deducts C/N
0value obtain the mean value of difference, the mean value of this difference is the average background noise value of mobile terminal, test result as shown in Table 1, and its average background noise value is-174.098dBm.
Table one
In step s 102, need the hardware environment of the wireless test building a GPS, and current testing hardware environment, need the quite high input of cost to set up, in order to reduce expense and cost, the invention provides the wireless test system of a kind of lower-cost mobile terminal GPS.As shown in Figure 3, the capital equipment forming this wireless test system has: gps signal generator 170, first attenuator 130, power splitter 140, phase shifter 150, second attenuator 160, quadrature dualpolarized antenna 110, microwave dark room 100, PC end 180.
Annexation and the effect of the said equipment are: described gps signal generator 170 connects the first attenuator 130, described first attenuator 130 connects described power splitter 140, described power splitter 140 connects phase shifter 150 and the second attenuator 160, described phase shifter 150 and the second attenuator 160 connect again described quadrature dualpolarized antenna 110, and described gps signal generator 170, first attenuator 130, second attenuator 160, quadrature dualpolarized antenna 110 and mobile terminal 120 control by PC end 180, such as, quadrature dualpolarized antenna 110 holds 180 to control by a RF switch control rule matrix 200 by described PC.Described gps signal generator 170 sends single satellite gps signal continuously, and its frequency can be 1575.42MHz.Gps signal is adjusted to suitable intensity after the first attenuator 130, two-way gps signal is being divided into by power splitter 140, wherein a road gps signal is through phase shifter 150, produce 90 degree of phase shifts, because this phase shifter 150 exists certain differential loss, in order to make two-way gps signal intensity equal, on an other road, one second attenuator 160 is set, utilize described second attenuator 160 to adjust the intensity of another road gps signal, thus guarantee that the intensity of two-way gps signal before feed-in quadrature dualpolarized antenna 110 is equal.The perpendicular polarization gps signal that the horizontal polarization analog signal exported by the second attenuator 160 like this and phase shifter 150 export is fed into quadrature dualpolarized antenna 110 together, horizontal direction and the vertical direction path of described quadrature dualpolarized antenna 110 are opened simultaneously, and now gps signal just can be transmitted in the space of microwave dark room 100 with the form of circularly polarised wave.In actual test process, can be positioned in microwave dark room 100 by quadrature dualpolarized antenna 110 and tested mobile terminal 120, the mobile terminal 120 in microwave dark room 100 just can receive gps signal, and can start to carry out wireless test to mobile terminal 120GPS.
In test process, the loss situation of the system that can form according to the said equipment, 180 (as computers) are held to adjust the pad value of the first attenuator 130 by PC, to control the power output of gps signal generator 170, intensity when making gps signal arrive tested mobile terminal 120 is about-130dBm, and-130dBm is close to the real gps signal intensity in outdoor, therefore, the result that tests out of the gps signal of this intensity is closest to the mobile terminal GPS receptivity under true environment.
After putting up the hardware environment needed for test, need the GPSNMEAlog information produced by mobile terminal in software extract real-time test process.The GPS chip of mobile terminal is when GPS function is opened, and the meeting of GPS chip generates GPSNMEAlog information automatically in real time, and described GPSNMEAlog information is transferred to PC end by modes such as bluetooth, WiFi or data wires, and carries out record by PC end; Or described GPSNMEAlog information can also be saved to mobile terminal internal memory with the form of document or be built in storage card by mobile terminal.Described GPSNMEAlog information for stepping, it have recorded the situation of the gps signal that mobile terminal receives with one second.
In described GPSNMEAlog information, conventional the widest compatible in other words statement has $ GPGGA (GlobalPositioningSystemFixData, GPS locating information), $ GPGSA (GPSDOPandActiveSatellites, present satellites information), $ GPGSV (GPSSatellitesinView, visible satellite information), $ GPRMC (RecommendedMinimumSpecificGPS/TRANSITData, recommend minimum locating information), $ GPVTG (TrackMadeGoodandGroundSpeed, ground speed information), $ GPGLL (GeographicPosition, geo-localisation information).And have two frame statements to need to use in the present invention: $ GPGGA and $ GPGSV, for above-mentioned two frame statements, it specifically defines and is explained as follows:
1), GlobalPositioningSystemFixData (GGA) GPS locating information;
$GPGGA，hhmmss.ss，llll.ll，a，yyyyy.yy，a，x，xx，x.x，x.x，M，x.x，M，x.x，xxxx*hh<CR><LF>；
<1>，<2>，<3>，<3>，<4>，<4>，<5>，<6>，<7>，<8>，<9>，<10>，<11>，<12>；
<1> statement identifies;
The <2>UTC time, hhmmss.ss (Hour Minute Second) form;
<3> latitude ddmm.mmmm (degree point) form, a: latitude hemisphere N (Northern Hemisphere) or S (Southern Hemisphere);
<4> longitude dddmm.mmmm (degree point) form, a: longitude hemisphere E (east longitude) or W (west longitude);
<5>GPS state: 0=no-fix, 1=non-differential is located, 2=Differential positioning, and 6=estimates;
<6> is using the number of satellite (00 ~ 12) resolving position;
<7>HDOP Horizontal Dilution of Precision (0.5 ~ 99.9);
<8> height above sea level, unit: rice;
The height of <9> earth ellipsoid face level surface relative to the earth, unit: rice;
<10> Differential time;
No. ID 0000 ~ 1023, <11> difference station;
<12> check code.
2), GPSSatellitesinView (GSV) visible satellite information;
$GPGSV，x，x，xx，xx，xx，xxx，xx..............，xx，xx，xxx，xx*CC<CR><LF>
<1>，<2>，<3>，<4>，<5>，<6>，<7>，<8>；
<1> statement identifies;
The quantity of the statement of the total GSV of <2>;
The numbering of this GSV of <3>;
The sum (00 ~ 12) of <4> visible satellite;
<5> satellite number (01 ~ 32);
<6> satellite elevation angle (00 ~ 90 degree);
<7> satellite aximuth (000 ~ 359 degree);
<8> signal to noise ratio (00 ~ 99dB).
Note: <5>, <6>, <7>, <8> information will carry out Circulating fibrocytes according to every satellite, and every bar GSV statement can show at most the information of 4 satellites.Other satellite informations will export in next GSV statement.
Below for the actual GPSNMEAlog information recorded, the two row information extracting a certain moment are as follows:
$GPGGA，
000114.00，，，，，0，00，999.9，，M，，M，，*66；
$GPGSV，1，1，01，27，01，000，
36*49；
" 000114.00 " wherein in $ GPGGA frame is UTC (coordinateduniversaltime, Coordinated Universal Time(UTC)) time, the form of described UTC time is hhmmss.ss, the UTC time is all reset for " 000000.00 " when each test starts, and start timing, the time of record is designated as t1, by being converted into first row (Time) information that can obtain in seconds in table three.The object that the present invention arranges this time is to make GPSNMEAlog information synchronous with the testing time, to carry out following step.Synchronous specific implementation is: when extracting the $ GPGGA frame statement in the GPSNMEAlog information of mobile terminal output at every turn, mobile terminal passes through the software real time modifying UTC time, and with the moment of testing beginning for zero point, when taking second as stepping.
Wherein 27 in $ GPGGA frame (after the 4th comma of this frame) is satellite number SID, the i.e. satellite number of gps signal generator setting, the snr value (C/N of " 27 " number satellite of 36 in this $ GPGGA frame (after the 7th comma of this frame) for receiving
0).
In test process, mobile terminal changes in the not anglec of rotation in the same time, and namely the self-position of mobile terminal needs to change, with testing mobile terminal diverse location GPS serviceability.In specific implementation process, can arrange the anglec of rotation that a revolving table position controller 190 adjusts mobile terminal, as shown in Figure 3, described revolving table position controller 190 one end connects the turntable being used for holding movable terminal, the other end connects PC end 180, is placed on turntable by mobile terminal 120.Thus, namely PC end 180 controls revolving table position, to adjust the position of mobile terminal 120 by revolving table position controller.Described PC end 180 also have recorded the spatial positional information that each moment tested rotation of mobile terminal arrives automatically, and generate the correspondence relationship information of testing time and mobile terminal locations, such as testing time and mobile terminal locations form one to one, saves as a csv file by described correspondence relationship information.The information that described csv file comprises mainly contains test setting information (as shown in Figure 4), synchronous signal information (as shown in Figure 5), test process information (as shown in Table 2).In Fig. 4, Phi and Theta represents two components of spheric coordinate system, and the start angle that it illustrates Phi is 0 degree, and step angle is 90 degree, and stop angle is 90 degree; The start angle of Theta is 0 degree, and step angle is 15 degree, and stop angle is 345 degree.In Fig. 5, Time1 and Time2 represents the time that mobile terminal arrives and leaves test position respectively, generally can set mobile terminal in the time of staying of a certain position is 10s, to guarantee that the gps signal that mobile terminal receives is stable, the pad value of " Attenuation " value first attenuator wherein.Synchronizing signal is formed by the pad value cyclic variation of the first attenuator, and its effect is using the square wave in two cycles as mark, determines the starting point of testing.Concrete test process information as shown in Table 2.
Table two
In step s 103, as shown in Figure 6, it specifically comprises step:
S201, snr value when to obtain mobile terminal different rotary angle according to described GPSNMEAlog information and the anglec of rotation in each moment of mobile terminal;
S202, obtain the average signal-to-noise ratio value of mobile terminal according to snr value during mobile terminal different rotary angle, and by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result.
Such as, specifically can utilize the macroefficiency of Excel, from described GPSNMEAlog information, extract the C/N of each second
0value, as moblilemeasurements (mobile terminal test) row in table three; And extract csv file, as the Position (test position in table three, the i.e. anglec of rotation) and Synchronisation (mobile terminal synchronization information) row, Time1 represents that mobile terminal arrives the time of this test position, and Time2 represents that mobile terminal leaves the time of this test position) row.Because GPSNMEAlog information is synchronous with the time of csv file, so, by testing time-test position-C/N
0relation one to one, just finally can obtain C/N
0the form that value is corresponding with test position (test position shows as the value of Phi and Theta).With Phi=90 degree, Theta=345 degree is example, check that Position and Synchronisation arranges, the testing time of this test position known is the 1014th second to the 1024th second, the corresponding time is found at moblilemeasurements according to this testing time, and get intermediate time value, namely the 1019th second time C/N
0value: 34dBm, fills out 34dBm in Result and correspondence position goes.According to the method described above, the snr value of other test positions can being asked, afterwards through asking the mean value in all Phi=0 degree faces and the mean value in Phi=90 degree face, the average C/N in Phi=0 degree face and Phi=90 degree face can be obtained respectively
0value: 34.84dBm, 33.46dBm, and the average C/N of all test positions on the mean value of both and sphere
0value 34.21dBm.By this average C/N
0value 34.21dBm adds that the average background noise value of mobile terminal is the radio sensitivity of tested mobile terminal :-174.098+34.21=-139.89dBm.
Table three
In sum, the radio test method of mobile terminal GPS of the present invention and system, obtain the average background noise value of mobile terminal in advance, again by carrying out OTA test in a hardware environment with low cost, the GPSNMEAlog information obtained according to test and the anglec of rotation in each moment of mobile terminal obtain the average signal-to-noise ratio value of mobile terminal, and after calibration by average background noise value, the final radio sensitivity obtaining tested mobile terminal.The present invention gets final product the simple hardware test environment of building structure by a small amount of input, and obtains the radio sensitivity of mobile terminal by a series of step, thus assesses mobile terminal GPS receptivity and true serviceability quantitatively.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (8)
1. a radio test method of mobile terminal GPS, for obtaining the radio sensitivity of mobile terminal, is characterized in that, comprising step:
A, in advance conduction test is carried out to mobile terminal, obtain the average background noise value of this mobile terminal;
B, described mobile terminal is placed on the wireless test carrying out different rotary angle in microwave dark room, and the GPS communications protocol information that Real-time Obtaining mobile terminal generates when receiving gps signal under different rotary angle case, and the anglec of rotation in each moment of record move terminal;
C, according to described GPS communications protocol information and the anglec of rotation in each moment of mobile terminal, generate the average signal-to-noise ratio value of mobile terminal, and by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result;
Described steps A specifically comprises:
The antenna feed point of A1, described mobile terminal and a gps signal generator wired connection;
The correspondence relationship information of A2, the signal strength signal intensity of acquisition gps signal generator and the snr value at antenna feed point place;
A3, obtain the average background noise value of mobile terminal according to the correspondence relationship information of described signal strength signal intensity and snr value;
The mean value that the snr value at described antenna feed point place obtains for 10 conduction tests, described signal strength signal intensity deduct the snr value at described antenna feed point place obtain difference mean value be the average background noise value of mobile terminal;
Control the power output of gps signal generator in described step B, intensity when making gps signal arrive tested mobile terminal is about-130dBm;
In described step B, the anglec of rotation in each moment of mobile terminal comprises mobile terminal and arrives a test position to Phi, Theta angle value corresponding to the time period and described time period of leaving this test position;
The time of staying of described mobile terminal on a test position is 10 seconds;
Described step C specifically comprises:
C1, snr value when to obtain mobile terminal different rotary angle according to described GPS communications protocol information and the anglec of rotation in each moment of mobile terminal;
C2, obtain the average signal-to-noise ratio value of mobile terminal according to snr value during mobile terminal different rotary angle, and by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result.
2. radio test method according to claim 1, is characterized in that, in described steps A, the antenna feed point of mobile terminal is connected with the cable line of gps signal generator by 50 Ω.
3. radio test method according to claim 1, is characterized in that, the GPS communications protocol information in described step B comprises: GPS locating information and visible satellite information; Described GPS locating information comprises the UTC time of the time synchronized for making time in GPS communications protocol information and wireless test, and described visible satellite information comprises the snr value that mobile terminal receives.
4. radio test method according to claim 3, is characterized in that, during the GPS communications protocol information generated when Real-time Obtaining mobile terminal receives gps signal under different rotary angle case, resetting the UTC time is zero point, and is stepping timing with second.
5. radio test method according to claim 1, is characterized in that, described step C2 specifically comprises:
C21, obtain the average signal-to-noise ratio value in mobile terminal Phi=0 degree face and Theta=90 degree face according to snr value during mobile terminal different rotary angle;
C22, obtain the average signal-to-noise ratio value of mobile terminal according to the average signal-to-noise ratio value in mobile terminal Phi=0 degree face and Theta=90 degree face;
C23, by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result.
6. a wireless test system of mobile terminal GPS, for obtaining the radio sensitivity of mobile terminal, is characterized in that, comprising:
Microwave dark room, for carrying out the wireless test of different rotary angle to mobile terminal;
Gps signal generator, for sending gps signal continuously in microwave dark room, also for carrying out the average background noise value that conduction test obtains this mobile terminal to mobile terminal;
The antenna feed point of described mobile terminal and a gps signal generator wired connection;
Obtain the correspondence relationship information of the signal strength signal intensity of gps signal generator and the snr value at antenna feed point place;
The average background noise value of mobile terminal is obtained according to the correspondence relationship information of described signal strength signal intensity and snr value;
The mean value that the snr value at described antenna feed point place obtains for 10 conduction tests, described signal strength signal intensity deduct the snr value at described antenna feed point place obtain difference mean value be the average background noise value of mobile terminal;
Control the power output of gps signal generator, intensity when making gps signal arrive tested mobile terminal is about-130dBm;
PC holds, the GPS communications protocol information generated when receiving gps signal for Real-time Obtaining mobile terminal under different rotary angle case, and the anglec of rotation in each moment of record move terminal, generate the average signal-to-noise ratio value of mobile terminal, and by obtaining test result after the calibration of described average background noise value, obtain the radio sensitivity of mobile terminal according to this test result;
Described microwave dark room, gps signal generator are held with PC respectively and are connected;
The anglec of rotation in each moment of mobile terminal comprises mobile terminal and arrives a test position to Phi, Theta angle value corresponding to the time period and described time period of leaving this test position;
The time of staying of described mobile terminal on a test position is 10 seconds.
7. wireless test system according to claim 6, is characterized in that, comprises a quadrature dualpolarized antenna for being propagated with circularly polarised wave form by gps signal in described microwave dark room.
8. wireless test system according to claim 7, it is characterized in that, described quadrature dualpolarized antenna connects a phase shifter and the second attenuator, described phase shifter and the second attenuator are also connected with a power splitter, described power splitter connects one first attenuator, and described first attenuator connects described gps signal generator; Described gps signal generator, the first attenuator, the second attenuator and quadrature dualpolarized antenna control by described PC end, and described PC end controls the anglec of rotation of mobile terminal by a revolving table position controller;
Gps signal is sent to the first attenuator by described gps signal generator, adjustment through described first attenuator is sent to power splitter, described power splitter is divided into the first via and the second road gps signal through gps signal, first via gps signal produces 90 degree of phase shifts through phase shifter, and the second road gps signal is fed into quadrature dualpolarized antenna after the adjustment of the second attenuator together with first via gps signal.
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| CN103336181B (en) | 2013-05-28 | 2015-10-07 | 惠州Tcl移动通信有限公司 | A kind of GPS OTA method of testing and system |
| CN104062666B (en) * | 2014-06-25 | 2016-08-24 | 广东欧珀移动通信有限公司 | A kind of method and device testing mobile terminal GPS function |
| CN105182370A (en) * | 2015-06-25 | 2015-12-23 | 工业和信息化部电信研究院 | Beidou equipment inter-module electromagnetic interference test method |
| CN105158776A (en) * | 2015-06-25 | 2015-12-16 | 工业和信息化部电信研究院 | Method for testing OTA of Beidou equipment assisted by communication network |
| CN105044739A (en) * | 2015-06-29 | 2015-11-11 | 中国电建集团成都勘测设计研究院有限公司 | GPS speed signal analyzing method |
| CN106209276A (en) * | 2016-07-05 | 2016-12-07 | 北京小米移动软件有限公司 | Radio frequency test method, device and terminal unit |
| CN106908808A (en) * | 2017-02-24 | 2017-06-30 | 深圳市金立通信设备有限公司 | A kind of GPS interference signals method of testing, test terminal and test device |
| CN109752734B (en) * | 2018-12-18 | 2023-11-10 | 联合汽车电子有限公司 | GPS test system and method for microwave darkroom |
| CN109828160B (en) * | 2019-03-13 | 2021-02-26 | 北京遥感设备研究所 | Automatic test system and method based on DSP high-frequency phase shift |
| CN110027954B (en) * | 2019-04-18 | 2020-09-01 | 广州广日电梯工业有限公司 | Elevator well communication device of changeable circuit |
| CN116772838B (en) * | 2023-08-21 | 2023-10-20 | 成都时代宇辰科技有限公司 | Inertial navigation error compensation method for mechanical phased array antenna |
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