CN102148885A - Method and system for testing multi-antenna terminal - Google Patents
Method and system for testing multi-antenna terminal Download PDFInfo
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- CN102148885A CN102148885A CN2010101072386A CN201010107238A CN102148885A CN 102148885 A CN102148885 A CN 102148885A CN 2010101072386 A CN2010101072386 A CN 2010101072386A CN 201010107238 A CN201010107238 A CN 201010107238A CN 102148885 A CN102148885 A CN 102148885A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W24/06—Testing, supervising or monitoring using simulated traffic
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- H—ELECTRICITY
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Abstract
The invention discloses a system for testing a multi-antenna terminal, comprising a base station simulator, a channel simulator, a mapping module and a soundproofing darkroom, wherein the soundproofing darkroom is internally provided with a device under test (DUT) and N test antennas; the base station simulator is used for outputting m paths of emission signals to the channel simulator; the channel simulator is used for adopting a channel model to simulate so as to obtain n paths of signals and outputting the n paths of signals to the mapping module in accordance with the received m paths of emission signals; the mapping module is used for mapping the received n paths of signals to the n test antennas in the soundproofing darkroom for air emission; and the DUT is used for receiving signals from the air and processing the received signals so as to finish the over the air (OTA) test. The invention also discloses a method for testing the multi-antenna terminal. By using the method and system disclosed by the invention, the OTA test and estimation for the multi-antenna terminal can be realized.
Description
Technical field
The present invention relates to the radio frequency testing technical field of Wireless Telecom Equipment, relate in particular to a kind of method of testing and system of multi-antenna terminal.
Background technology
Along with development of modern industry, all kinds of Wireless Telecom Equipments only have and good transmit and receive performance and could guarantee communication quality, promptly, total radiant power (TRP, Total Radiated Power) need be higher than a threshold value, global radiation sensitivity (TRS, Total Radiated Sensitivity) need be lower than a threshold value, it is good to that is to say that spacial radio frequency performance (OTA, Over The Air) test index requires.
In order to ensure the normal use of mobile terminal device in network, cellular based communication Association for Standardization (CTIA, Cellular Telecommunications Industry Association) has formulated the testing standard of portable terminal spacial radio frequency performance.At present, big multi-operator all requires to enter the portable terminal of its network, carries out the spacial radio frequency performance test according to the requirement of CTIA standard, and TRP, TRS will satisfy certain limit value requirement.
For traditional single antenna terminal, be the test of in traditional darkroom, carrying out indexs such as TRP, TRS.Along with present Long Term Evolution (LTE, Long Term Evolution) etc. system is about to industrialization, traditional single antenna equipment will be gradually excessively be the communication equipment of the multi-antenna technology that has multiple-input and multiple-output (MIMO, Multiple Input MultipleOutput).Yet traditional darkroom can't be tested and assess the space performance of multi-antenna terminal, and this has brought inconvenience to practical application.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of testing and system of multi-antenna terminal, to solve the problem that traditional darkroom can't be tested and assess the spacial radio frequency performance of multi-antenna terminal.
For achieving the above object, technical scheme of the present invention is achieved in that
The method of testing of a kind of multi-antenna terminal provided by the present invention, this method comprises:
Base station simulator output m road transmits to channel simulator;
Described channel simulator transmits according to the m road that receives, and adopts the channel model simulation to obtain n road signal and export to mapping block;
Described mapping block sends the n road signal map of receiving to the enterprising row space of the N root test antenna in noise elimination darkroom;
Devices to test (DUT) receives the signal from the space, and the signal that receives is handled, and finishes spacial radio frequency performance (OTA) test.
The quantity N of test antenna is more than or equal to the quantity n in the main footpath of employing channel model in the described noise elimination darkroom.
Described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be evenly distributed on described DUT in equally spaced mode be on the circumference in the center of circle.
Described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ;
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-1 size is the central angle of φ, and 1 size is the central angles of * φ of 2 π-(N-1).
Described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ, and choose φ
1And φ
2, make φ
1+ φ
2The * φ of=2 π-(N-2);
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-2 size is the central angle of φ, 1 size is φ
1Central angle, and 1 size is φ
2Central angle.
The present invention also provides a kind of test macro of multi-antenna terminal, and this system comprises: base station simulator, channel simulator, mapping block and noise elimination darkroom, be provided with Devices to test (DUT) and N root test antenna in the described noise elimination darkroom, wherein,
Described base station simulator is used to export the m road and transmits to described channel simulator;
Described channel simulator is used for transmitting according to the m road that receives, and adopts the channel model simulation to obtain n road signal and export to described mapping block;
Described mapping block, the n road signal map that is used for receiving sends to the enterprising row space of the N root test antenna in noise elimination darkroom;
Described DUT is used to receive the signal from the space, and the signal that receives is handled, and finishes the OTA test.
The quantity N of test antenna is more than or equal to the quantity n in the main footpath of employing channel model in the described noise elimination darkroom.
Described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be evenly distributed on described DUT in equally spaced mode be on the circumference in the center of circle.
Described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ;
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-1 size is the central angle of φ, and 1 size is the central angles of * φ of 2 π-(N-1).
Described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ, and choose φ
1And φ
2, make φ
1+ φ
2The * φ of=2 π-(N-2);
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-2 size is the central angle of φ, 1 size is φ
1Central angle, and 1 size is φ
2Central angle.
The method of testing of a kind of multi-antenna terminal provided by the present invention and system, base station simulator output m road transmits to channel simulator; Channel simulator transmits according to the m road that receives, and adopts the channel model simulation to obtain n road signal and export to mapping block; Mapping block sends the n road signal map of receiving to the enterprising row space of the N root test antenna in noise elimination darkroom; Devices to test (DUT) receives the signal from the space, and the signal that receives is handled, and finishes spacial radio frequency performance (OTA) test.By method and system of the present invention, realized spacial radio frequency performance test and assessment to multi-antenna terminal, satisfy the demand of MIMO OTA.
Description of drawings
Fig. 1 is the structural representation of the test macro of a kind of multi-antenna terminal of the embodiment of the invention;
Fig. 2 is the flow chart of the method for testing of a kind of multi-antenna terminal of the embodiment of the invention;
Fig. 3 is the schematic diagram that N root test antenna is symmetrically distributed in the embodiment of the invention;
Fig. 4 is the schematic diagram of N root test antenna asymmetric distribution in the embodiment of the invention.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
For realizing space performance test and the assessment to multi-antenna terminal, the embodiment of the invention provides a kind of test environment based on channel simulator and noise elimination darkroom (also claiming full electric wave to absorb the darkroom), can satisfy the demand of MIMOOTA.Wherein, the test antenna of some is arranged in the noise elimination darkroom, these test antennas are arranged in the diverse location in noise elimination darkroom, and send signal with regular hour and spatial character, in order to the test multi-antenna terminal; Devices to test (DUT, Device Under Test) is positioned at the center in noise elimination darkroom, and it is on the circumference at center that each test antenna is positioned at DUT, and this is in order to guarantee that the signal that each test antenna sends arrives DUT simultaneously.
Test macro based on the multi-antenna terminal of above-mentioned test environment as shown in Figure 1, comprising: base station simulator (BS emulator), channel simulator, mapping block and noise elimination darkroom, and be provided with DUT and N root test antenna in the noise elimination darkroom.
The method of testing of the multi-antenna terminal of being realized by test macro shown in Figure 1 as shown in Figure 2, mainly may further comprise the steps:
Base station simulator is used for transmitting of anolog base station, and output m roadbed station transmits, i.e. transmitting of m foundation station antenna, and the m value is a positive integer.
The output signal of base station simulator inputs to channel simulator, and with the situation of anolog base station signal by space channel, channel simulator simulation output n road signal is given mapping block, and the n value is a positive integer.Wherein, channel simulator is to adopt the channel model of choosing to simulate to obtain n road signal, and the main footpath quantity of channel model is n, so just can simulate and obtain n road signal.
N road signal is mapped to certain mapping relations at mapping block on the N root test antenna in noise elimination darkroom, and N root test antenna carries out the space to signal and sends, and the N value is a positive integer.
The quantity N of test antenna need be more than or equal to the quantity n in the main footpath of employing channel model in the noise elimination darkroom, and the preferred value of N selects to equate with n, behind the employed channel model of definite OTA, promptly can determine the preferred value of its test antenna quantity.For example: based on space channel model (SCM, Spatial ChannelModeling), the space channel model of expansion (SCME, Spatial Channel Modeling Extended), Winner I﹠amp; The quantity in the main footpath of the channel model of II definition is 6 or 8, and therefore preferred single polarization test antenna quantity N is 6 or 8.For the dual polarization situation, in same antenna position configuration cross-polarized two antennas are mutually arranged, be V﹠amp; The X cross polarization of H or inclination, the preferred value of needed test antenna quantity N corresponds to 6 * 2 or 8 * 2, promptly 12 or 16.Test antenna quantity in the darkroom can equal but be not limited thereto preferred value.
DUT is positioned at the center, darkroom, and to be ordered in DUT be the center of circle to N root test antenna with certain, and R is on the circumference of radius; DUT receives the signal from the space, and handles to received signal, or spreads out of by cable and to carry out subsequent treatment, verifies to the received signal, thereby finishes the OTA test.
For arranging of N root test antenna, multiple mode can be arranged.A kind of arrangement mode is: DUT is positioned at the center in noise elimination darkroom, and it is the center of circle that N root test antenna is distributed in DUT, is on the circumference of radius with R, and the central angle alpha between the test antenna is equal, is 2 π/N, as shown in Figure 3; That is to say that it is the center of circle that N root test antenna is evenly distributed on DUT in equally spaced mode, R is on the circumference of radius.
For this arrangement mode, because the preferred value commonly used of N is 6 or 8, be even number, so the central angle alpha at interval is the π of integer branch between each test antenna, test antenna is accurately symmetrical between any two.This accurate symmetry might cause the phase mutual interference between the symmetrical test antenna, therefore be necessary to design a kind of test antenna arrangement mode of asymmetry, be that N test antenna be distributed in DUT be the center of circle, R is on the circumference of radius, and the central angle between the test antenna is not exclusively equal.
A kind of test antenna arrangement mode of asymmetry is: extended corner, the angle of arrival and the simplification footpath required angle of number according to the main footpath in the channel model are at first determined an angle φ; This N root test antenna distribution on the circumference that with DUT is the center of circle so, constituting N-1 size is the central angle of φ, and 1 size is the central angles of * φ of 2 π-(N-1), promptly in N the central angle that all N root test antennas are constituted, comprising N-1 size is the central angles of * φ of 2 π-(N-1) for the central angle of φ and 1 size, and * represents to multiply each other.The arrangement mode of this asymmetry can solve the interference problem of above-mentioned symmetrical antenna, yet works as
The time, if still adopt N-1 size, will make the * φ of 2 π-(N-1), thereby cause more serious unbalancedly greater than 2 φ for the central angle of φ and 1 size are the central angles of * φ of 2 π-(N-1), might follow-up signal map be had a negative impact.
For this reason, based on the improvement of this asymmetry arrangement mode, the present invention also provides the arrangement mode of another kind of asymmetry, as shown in Figure 4, that is: at first determine an angle φ according to extended corner, the angle of arrival and the simplification footpath required angle of number in the main footpath in the channel model, and choose φ
1And φ
2, make φ
1+ φ
2The * φ of=2 π-(N-2); This N root test antenna distribution on the circumference that with DUT is the center of circle so, constituting N-2 size is the central angle of φ, 1 size is φ
1Central angle, and 1 size is φ
2Central angle, promptly in N the central angle that all N root test antennas are constituted, comprising N-2 size is φ for the central angle of φ, 1 size
1Central angle, 1 size be φ
2Central angle.Wherein, φ
1And φ
2Choose can be according to actual needs, as long as satisfy φ
1+ φ
2=2 π-(N-2) * φ gets final product, and is preferable certainly, can choose φ
1And φ
2Size more approaching.
This shows,, can well avoid the big or small unbalanced problem of above-mentioned central angle by the improvement of this asymmetry arrangement mode.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. the method for testing of a multi-antenna terminal is characterized in that, this method comprises:
Base station simulator output m road transmits to channel simulator;
Described channel simulator transmits according to the m road that receives, and adopts the channel model simulation to obtain n road signal and export to mapping block;
Described mapping block sends the n road signal map of receiving to the enterprising row space of the N root test antenna in noise elimination darkroom;
Devices to test (DUT) receives the signal from the space, and the signal that receives is handled, and finishes spacial radio frequency performance (OTA) test.
2. according to the method for testing of the described multi-antenna terminal of claim 1, it is characterized in that the quantity N of test antenna is more than or equal to the quantity n in the main footpath of employing channel model in the described noise elimination darkroom.
3. according to the method for testing of claim 1 or 2 described multi-antenna terminals, it is characterized in that described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be evenly distributed on described DUT in equally spaced mode be on the circumference in the center of circle.
4. according to the method for testing of claim 1 or 2 described multi-antenna terminals, it is characterized in that described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ;
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-1 size is the central angle of φ, and 1 size is the central angles of * φ of 2 π-(N-1).
5. according to the method for testing of claim 1 or 2 described multi-antenna terminals, it is characterized in that described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ, and choose φ
1And φ
2, make φ
1+ φ
2The * φ of=2 π-(N-2);
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-2 size is the central angle of φ, 1 size is φ
1Central angle, and 1 size is φ
2Central angle.
6. the test macro of a multi-antenna terminal is characterized in that, this system comprises: base station simulator, channel simulator, mapping block and noise elimination darkroom, be provided with Devices to test (DUT) and N root test antenna in the described noise elimination darkroom, wherein,
Described base station simulator is used to export the m road and transmits to described channel simulator;
Described channel simulator is used for transmitting according to the m road that receives, and adopts the channel model simulation to obtain n road signal and export to described mapping block;
Described mapping block, the n road signal map that is used for receiving sends to the enterprising row space of the N root test antenna in noise elimination darkroom;
Described DUT is used to receive the signal from the space, and the signal that receives is handled, and finishes the OTA test.
7. according to the test macro of the described multi-antenna terminal of claim 6, it is characterized in that the quantity N of test antenna is more than or equal to the quantity n in the main footpath of employing channel model in the described noise elimination darkroom.
8. according to the test macro of claim 6 or 7 described multi-antenna terminals, it is characterized in that described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be evenly distributed on described DUT in equally spaced mode be on the circumference in the center of circle.
9. according to the test macro of claim 6 or 7 described multi-antenna terminals, it is characterized in that described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ;
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-1 size is the central angle of φ, and 1 size is the central angles of * φ of 2 π-(N-1).
10. according to the test macro of claim 6 or 7 described multi-antenna terminals, it is characterized in that described DUT is positioned at the center in noise elimination darkroom, and described N root test antenna to be distributed in DUT in the mode of asymmetry be on the circumference in the center of circle, be specially:
Extended corner, the angle of arrival and the required angle of simplification footpath number according to the main footpath in the described channel model are determined an angle φ, and choose φ
1And φ
2, make φ
1+ φ
2The * φ of=2 π-(N-2);
The distribution of described N root test antenna on the circumference that with DUT is the center of circle, constituting N-2 size is the central angle of φ, 1 size is φ
1Central angle, and 1 size is φ
2Central angle.
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| CN2010101072386A CN102148885A (en) | 2010-02-05 | 2010-02-05 | Method and system for testing multi-antenna terminal |
| PCT/CN2010/074271 WO2011094988A1 (en) | 2010-02-05 | 2010-06-22 | Method and system for testing multi-antenna terminal |
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| CN2010101072386A CN102148885A (en) | 2010-02-05 | 2010-02-05 | Method and system for testing multi-antenna terminal |
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| CN108307421A (en) * | 2018-01-12 | 2018-07-20 | 深圳市通用测试***有限公司 | The measurement method of wireless terminal, computer readable storage medium, apparatus and system |
| CN109889239A (en) * | 2019-03-27 | 2019-06-14 | 北京邮电大学 | A kind of double darkroom structures and test method for MIMO OTA test |
| CN110708125A (en) * | 2019-10-29 | 2020-01-17 | 北京邮电大学 | Method for constructing dynamic target channel and air interface test system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107979424A (en) * | 2016-10-19 | 2018-05-01 | 罗德施瓦兹两合股份有限公司 | For testing the test system and method for measurement equipment |
| CN107979424B (en) * | 2016-10-19 | 2022-03-11 | 罗德施瓦兹两合股份有限公司 | Test system and method for testing a device under test |
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| CN109889239A (en) * | 2019-03-27 | 2019-06-14 | 北京邮电大学 | A kind of double darkroom structures and test method for MIMO OTA test |
| CN109889239B (en) * | 2019-03-27 | 2020-12-08 | 北京邮电大学 | Double-darkroom structure for MIMO OTA test and test method |
| CN110708125A (en) * | 2019-10-29 | 2020-01-17 | 北京邮电大学 | Method for constructing dynamic target channel and air interface test system |
| CN110708125B (en) * | 2019-10-29 | 2020-09-01 | 北京邮电大学 | Method for constructing dynamic target channel and air interface test system |
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| WO2011094988A1 (en) | 2011-08-11 |
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