CN101998455A - Test method and test system for spatial radio-frequency performance of multi-antenna system - Google Patents
Test method and test system for spatial radio-frequency performance of multi-antenna system Download PDFInfo
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- CN101998455A CN101998455A CN2009101692174A CN200910169217A CN101998455A CN 101998455 A CN101998455 A CN 101998455A CN 2009101692174 A CN2009101692174 A CN 2009101692174A CN 200910169217 A CN200910169217 A CN 200910169217A CN 101998455 A CN101998455 A CN 101998455A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
Abstract
The invention discloses a test method and a test system for the spatial radio frequency performance of a multi-antenna system. The test method comprises the following steps of: placing 6 antennas on the periphery of equipment to be tested comprising N receiving antennas; placing the equipment to be tested and all the antennas into an anechoic chamber; simulating and outputting M paths of base station transmitting signals of M base station transmitting antennas in a Long Term Evolution (LTE) base station; simulating to divide the M-path base station transmitting signals into six paths of signals passing through six main paths; transmitting the six paths of signals to the different antennas in the anechoic chamber; and transmitting the received signals to the receiving antennas of the equipment to be tested by the six antennas. The technical scheme of the invention can test the spatial radio frequency performance in the multi-antenna system.
Description
Technical field
The present invention relates to the radio frequency testing technical field of wireless communications products, be specifically related to a kind of method of testing and test macro of multiaerial system spacial radio frequency performance.
Background technology
Along with development of modern industry, all kinds of radio communication products only possess and good transmit and receive performance and could guarantee communication quality, promptly, total radiant power (Total Radiated Power, hereafter is TRP) to be higher than certain value, (Total Radiated Sensitivity TRS) will be lower than certain value in global radiation sensitivity, that is to say that spacial radio frequency performance (Over The Air, hereafter is OTA) test index is good.
CTIA (cellular based communication Association for Standardization) normally uses in network in order to ensure mobile terminal device, the testing standard of having formulated the portable terminal spacial radio frequency performance is " The test plan for mobile station OTA performance ", at present, the portable terminal spacial radio frequency performance that a lot of operations commercial city requires to enter its network will be tested according to the CTIA standard-required, and TRP, TRS will satisfy certain limit value requirement.
In the CTIA standard, be on the sphere that is the center of circle, to carry out access point testing with the equipment under test for the measurement of TRP and TRS.In order accurately to estimate the performance that transmits and receives of equipment under test, need choose abundant test point.Tested wireless communications products is positioned on first rotating shaft or second rotating shaft of a testing apparatus, and the first rotating shaft rotating range is the 0-180 degree, and the second rotating shaft rotating range is the 0-360 degree.Wherein the TRP test need be got a test point every 15 degree θ (0-180 degree) and Φ (0-360 degree), needs to test 264 points altogether.The TRS test needs to get a test point every 30 degree θ (0-180 degree) and Φ (0-360 degree), needs 60 points of test altogether.Because test point is that equal angles is chosen, so its right and wrong on sphere are equally distributed.TRP, TRS need carry out surface integral according to all test points and calculate.In integral operation, to being positioned at θ=0, two test points of θ=180, its sine value is zero, so these two points are not tested.
Multiaerial system (multiple-input and multiple-output, MIMO) testing scheme of the radio-frequency (RF) index under are not arranged in the present international standard as yet.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of testing and test macro of multiaerial system spacial radio frequency performance, can carry out the spacial radio frequency performance test under multiaerial system.
In order to address the above problem, the invention provides a kind of method of testing of multiaerial system spacial radio frequency performance, comprising:
At 6 antennas of the Devices to test placed around that comprises N root reception antenna, described Devices to test and described antenna all are placed in the full electric wave absorption darkroom;
The M roadbed station of M foundation station transmitting antenna transmits in the simulation output LTE base station;
This M roadbed station transmitted be modeled as respectively 6 road signals by 6 main footpaths;
Described 6 road signals are transferred to described full electric wave respectively to be absorbed on the described antennas different in the darkroom;
Described 6 antennas send to the signal that receives each reception antenna of described Devices to test respectively.
Further, described full electric wave absorbs 6 antennas in the darkroom, and evenly to be placed on described Devices to test be on the circumference in the center of circle, and the central angle angle in 6 antennas between any 2 adjacent antennas is 60 degree.
Further, described this M roadbed station steps that are modeled as respectively 6 road signals by 6 main footpaths that transmit are specifically comprised:
Following operation is carried out in each bar master footpath in 6 main footpaths respectively:
The signal that enters all 20 strips footpaths in this master footpath in transmitting to M roadbed station the 1 road respectively superposes, and obtains all signals directly by this master.
Further, in 6 main footpaths each bar each directly form by 20 strips; The matrix H of space channel of simulation be H (M, N, 6*20, the time length of field).
Further, described this M roadbed station steps that are modeled as respectively 6 road signals by 6 main footpaths that transmit are specifically comprised:
With the matrix element addition of the 20 strips space channel directly in each bar master footpath, obtain the channel elements in 6 main footpaths respectively;
M roadbed station transmitted multiply by the channel elements in 6 main footpaths respectively, obtain 6 road signals by 6 main footpaths.
The present invention also provides a kind of test macro of multiaerial system spacial radio frequency performance, comprising:
The full electric wave that is used to place the Devices to test that comprises N root reception antenna absorbs the darkroom, comprises that 6 are placed on described Devices to test antenna on every side;
The base station signal simulator is used for simulating the base station transmit signals of output M foundation station, LTE base station transmitting antenna, and the base station transmit signals of being exported is a M road signal;
Based on the mimo channel simulator of multipath fading, being used for described M roadbed station transmitted is modeled as respectively 6 road signals by 6 main footpaths; Described 6 road signals are transferred to described full electric wave respectively to be absorbed on the described antennas different in the darkroom;
The signal that described antenna is used for receiving sends to each reception antenna of described Devices to test.
Further, described full electric wave absorbs 6 antennas in the darkroom, and evenly to be placed on described Devices to test be on the circumference in the center of circle, and the central angle angle in 6 antennas between any 2 adjacent antennas is 60 degree.
Further, described mimo channel simulator transmits described M roadbed station to be modeled as respectively and is meant by 6 main 6 road signals directly:
Described mimo channel simulator carries out following operation respectively to each the bar master footpath in 6 main footpaths:
The signal that enters all 20 strips footpaths in this master footpath in transmitting to M roadbed station the 1 road respectively superposes, and obtains all signals directly by this master.
Further, in 6 main footpaths each bar each directly form by 20 strips; The matrix H of the space channel that described mimo channel simulator is adopted be H (M, N, 6*20, the time length of field).
Further, described mimo channel simulator transmits this M roadbed station to be modeled as respectively and is meant by 6 main 6 road signals directly:
Described mimo channel simulator obtains the channel elements in 6 main footpaths respectively with the matrix element addition of the 20 strips space channel directly in each bar master footpath; M roadbed station transmitted multiply by the channel elements in 6 main footpaths respectively, obtain 6 road signals by 6 main footpaths.
Technical scheme of the present invention provides a kind of method of testing and system that absorbs the multiaerial system spacial radio frequency performance of darkroom method based on channel simulation and full electric wave, signal conversion process is succinct, corresponding relation between signal and antenna is clear, and can effectively satisfy the requirement of carrying out the spacial radio frequency performance test under the multiaerial system.Prioritization scheme of the present invention has further disclosed sets up test environment, the realization details such as relation of antenna and signal in the full electric wave absorption darkroom.It is the signal by the son footpath to be superposeed to merge handle the signal that obtains by each bar footpath that a prioritization scheme of the present invention discloses the mimo channel simulation, has simplified sub-footpath Signal Processing process.
Description of drawings
Description of drawings is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is to be the spheric coordinate system schematic diagram of initial point foundation with tested radio communication product;
Fig. 2 is the schematic block diagram of test macro of the multiaerial system spacial radio frequency performance of embodiment two.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Embodiment one, and a kind of method of testing of multiaerial system spacial radio frequency performance comprises:
At 6 antennas of the Devices to test that comprises N root reception antenna (DUT) placed around, described Devices to test and described antenna all are placed in the full electric wave absorption darkroom;
The M roadbed station of M foundation station transmitting antenna transmits in the simulation output LTE base station;
This M roadbed station transmitted be modeled as respectively 6 road signals by 6 main footpaths;
Described 6 road signals are transferred to described full electric wave respectively to be absorbed on the described antennas different in the darkroom;
Described 6 antennas send to the signal that receives each reception antenna of described Devices to test respectively.
Wherein, described M is the base station transmit antennas number, and described N is the reception antenna number of Devices to test (DUT); Described M and N are the integer greater than 1, can be identical or different.
As seen, described 6 road signals by 6 main footpaths respectively of described mimo channel simulator output are corresponding one by one with described 6 antennas respectively, and each road signal is sent to respectively on each self-corresponding antenna; This simple signal corresponding relation has been simplified test process, can effectively finish test process.
Described full electric wave absorbs 6 antennas in the darkroom and evenly is placed on described Devices to test to be on the circumference in the center of circle, to that is to say, the central angle angle in 6 antennas between any 2 adjacent antennas is 60 degree (is the center of circle with described Devices to test); And described 6 antennas and Devices to test are on the same horizontal plane.
In the practical application, the pass of not getting rid of between 6 antennas and the Devices to test, position is other situation.
Mimo channel model commonly used is divided into two classes, and a class is based on " directly " channel model (referring to TR25.996) (path) and between the multi-antenna space of son footpath principle, and the another kind of channel model of correlation matrix that is based on is (referring to TR25.814; TR36.814).
In the present embodiment, adopt mimo channel model to come Simulation of Complex multidiameter propagation and channel environment based on multipath; The mimo channel model based on multipath that adopts during the analog channel environment directly is made up of 6 spaces, every roadbed station, described 6 footpaths transmit and every footpath between all have mapping, that is to say that all some enters every main footpath during every roadbed station transmits.
In the present embodiment, in described 6 main footpaths every can but be not limited to directly form by 20 strips.
In the present embodiment, described the M roadbed station steps that are modeled as respectively 6 road signals by 6 main footpaths that transmit specifically can be comprised:
Respectively every roadbed station being transmitted, the signal by each son footpath among 1 (path1) of footpath superposes in (the 1st roadbed station transmits signals to M roadbed station and transmits), obtain all signals by footpath 1 (path1), this transmits comprising every roadbed station and enters the signal in all the 20 strips footpaths among 1 (path1) of footpath; In like manner can obtain each road signal to footpath 6 (path6) respectively by footpath 2 (path2).
In the present embodiment, mimo channel model based on multipath directly is made up of 6 spaces, every the footpath directly is made up of 20 strips, the number of transmit antennas of base station side is M, and the reception antenna number of Devices to test (DUT) is N, so the matrix of representation space channel is 4 dimensions (can tie up more than 4) at least, the multi-dimensional matrix of channel matrix H can be expressed as H (M, N, 6*20, the time length of field).
In the present embodiment, described the M roadbed station steps that are modeled as respectively 6 road signals by 6 main footpaths that transmit also can specifically be comprised:
With the matrix element addition of the 20 strips space channel directly in each bar master footpath, obtain the channel elements in 6 main footpaths respectively;
M roadbed station transmitted multiply by the channel elements in 6 main footpaths respectively, obtain 6 road signals by 6 main footpaths.
This process is equivalent to the signal plus by the footpath of 20 strips in every footpath, thereby obtains belonging to the signal in every footpath.
At last, to export described full electric wave absorption darkroom respectively to 6 road signals of footpath 6 (path6) by footpath 1 (path1), the antenna number that full electric wave absorbs in the darkroom is 6, respectively and 6 road signals by 6 footpaths corresponding one by one, to send to the corresponding antenna in this footpath respectively to the signal of path6 by path1, what absorb that every antenna in the darkroom receives at described full electric wave is signal by a main footpath.
Embodiment two, and a kind of test macro of multiaerial system spacial radio frequency performance comprises:
The full electric wave that is used to place the Devices to test (DUT) that comprises N root reception antenna absorbs the darkroom, comprises that 6 are placed on described Devices to test antenna on every side;
Base station signal simulator (BS emulator) is used for simulating the base station transmit signals of output M foundation station, LTE base station transmitting antenna, and the base station transmit signals of being exported is a M road signal;
Mimo channel simulator (MIMO channel simulator) based on multipath fading also can be described as the mimo channel simulator, is used for the virtual space channel conditions, and described M roadbed station is transmitted to be modeled as respectively by 6 main 6 road signals directly; Described 6 road signals are transferred to described full electric wave respectively to be absorbed on the described antennas different in the darkroom;
The signal that described antenna is used for receiving sends to each reception antenna of described Devices to test.
Wherein, described M is the base station transmit antennas number, and described N is the reception antenna number of Devices to test (DUT); Described M and N are the integer greater than 1, can be identical or different.
As seen, described 6 road signals by 6 main footpaths respectively of described mimo channel simulator output are corresponding one by one with described 6 antennas respectively, and each road signal is sent to respectively on each self-corresponding antenna; This simple signal corresponding relation has been simplified test process, can effectively finish test process.
Described full electric wave absorbs 6 antennas in the darkroom and evenly is placed on described Devices to test to be on the circumference in the center of circle, to that is to say, the central angle angle in 6 antennas between any 2 adjacent antennas is 60 degree (is the center of circle with described Devices to test); And described 6 antennas and Devices to test are on the same horizontal plane.
In the present embodiment, described mimo channel simulator adopts the mimo channel model based on multipath to come Simulation of Complex multidiameter propagation and channel environment.The mimo channel model based on multipath that adopts during the analog channel environment directly is made up of 6 spaces, every roadbed station, described 6 footpaths transmit and every footpath between all have mapping, that is to say that all some enters every main footpath during every roadbed station transmits.
In the present embodiment, in described 6 main footpaths every can but be not limited to directly form by 20 strips.
In the present embodiment, described mimo channel simulator can be meant described M roadbed station 6 road signals that are modeled as respectively by 6 footpaths that transmit:
Described mimo channel simulator transmits every roadbed station respectively, and the signal by each son footpath among 1 (path1) of footpath superposes in (the 1st roadbed station transmits signals to M roadbed station and transmits), obtain all signals by footpath 1 (path1), this transmits comprising every roadbed station and enters the signal in all the 20 strips footpaths among 1 (path1) of footpath; In like manner can obtain each road signal to footpath 6 (path6) respectively by footpath 2 (path2).
In the present embodiment, mimo channel model based on multipath directly is made up of 6 spaces, every the footpath directly is made up of 20 strips, the number of transmit antennas of base station side is M, and the reception antenna number of Devices to test (DUT) is N, is (can more than 4 dimensions) of 4 dimensions at least so described mimo channel simulator is used for the matrix of representation space channel, the matrix H of this space channel can be expressed as H (M, N, 6*20, the time length of field).
In the present embodiment, described mimo channel simulator also can be meant described M roadbed station 6 road signals that are modeled as respectively by 6 footpaths that transmit:
Described mimo channel simulator obtains the channel elements in 6 main footpaths respectively with the matrix element addition of the 20 strips space channel directly in each bar master footpath; M roadbed station transmitted multiply by the channel elements in 6 main footpaths respectively, obtain 6 road signals by 6 main footpaths.
This process is equivalent to the signal plus by the footpath of 20 strips in every footpath, thereby obtains belonging to the signal in every footpath.
Described mimo channel simulator will export described full electric wave absorption darkroom respectively to 6 road signals of footpath 6 (path6) by footpath 1 (path1), the antenna number that full electric wave absorbs in the darkroom is 6, respectively and 6 road signals by 6 footpaths corresponding one by one, described mimo channel simulator will send to the corresponding antenna in this footpath respectively to the signal of path6 by path1, and what absorb that every antenna in the darkroom receives at described full electric wave is signal by a main footpath.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for testing of a multiaerial system spacial radio frequency performance comprises:
At 6 antennas of the Devices to test placed around that comprises N root reception antenna, described Devices to test and described antenna all are placed in the full electric wave absorption darkroom;
The M roadbed station of M foundation station transmitting antenna transmits in the simulation output LTE base station;
This M roadbed station transmitted be modeled as respectively 6 road signals by 6 main footpaths;
Described 6 road signals are transferred to described full electric wave respectively to be absorbed on the described antennas different in the darkroom;
Described 6 antennas send to the signal that receives each reception antenna of described Devices to test respectively.
2. method of testing as claimed in claim 1 is characterized in that:
Described full electric wave absorbs 6 antennas in the darkroom, and evenly to be placed on described Devices to test be on the circumference in the center of circle, and the central angle angle in 6 antennas between any 2 adjacent antennas is 60 degree.
3. method of testing as claimed in claim 1 or 2 is characterized in that, described this M roadbed station steps that are modeled as respectively 6 road signals by 6 main footpaths that transmit is specifically comprised:
Following operation is carried out in each bar master footpath in 6 main footpaths respectively:
The signal that enters all 20 strips footpaths in this master footpath in transmitting to M roadbed station the 1 road respectively superposes, and obtains all signals directly by this master.
4. method of testing as claimed in claim 1 or 2 is characterized in that:
Article 6, each bar respectively directly is made up of 20 strips in the main footpath; The matrix H of space channel of simulation be H (M, N, 6*20, the time length of field).
5. method of testing as claimed in claim 4 is characterized in that, described this M roadbed station steps that are modeled as respectively 6 road signals by 6 main footpaths that transmit is specifically comprised:
With the matrix element addition of the 20 strips space channel directly in each bar master footpath, obtain the channel elements in 6 main footpaths respectively;
M roadbed station transmitted multiply by the channel elements in 6 main footpaths respectively, obtain 6 road signals by 6 main footpaths.
6. the test macro of a multiaerial system spacial radio frequency performance is characterized in that, comprising:
The full electric wave that is used to place the Devices to test that comprises N root reception antenna absorbs the darkroom, comprises that 6 are placed on described Devices to test antenna on every side;
The base station signal simulator is used for simulating the base station transmit signals of output M foundation station, LTE base station transmitting antenna, and the base station transmit signals of being exported is a M road signal;
Based on the mimo channel simulator of multipath fading, being used for described M roadbed station transmitted is modeled as respectively 6 road signals by 6 main footpaths; Described 6 road signals are transferred to described full electric wave respectively to be absorbed on the described antennas different in the darkroom;
The signal that described antenna is used for receiving sends to each reception antenna of described Devices to test.
7. test macro as claimed in claim 6 is characterized in that:
Described full electric wave absorbs 6 antennas in the darkroom, and evenly to be placed on described Devices to test be on the circumference in the center of circle, and the central angle angle in 6 antennas between any 2 adjacent antennas is 60 degree.
8. as claim 6 or 7 described test macros, it is characterized in that described mimo channel simulator transmits described M roadbed station to be modeled as respectively and is meant by 6 main 6 road signals directly:
Described mimo channel simulator carries out following operation respectively to each the bar master footpath in 6 main footpaths:
The signal that enters all 20 strips footpaths in this master footpath in transmitting to M roadbed station the 1 road respectively superposes, and obtains all signals directly by this master.
9. as claim 6 or 7 described test macros, it is characterized in that:
Article 6, each bar respectively directly is made up of 20 strips in the main footpath; The matrix H of the space channel that described mimo channel simulator is adopted be H (M, N, 6*20, the time length of field).
10. test macro as claimed in claim 9 is characterized in that, described mimo channel simulator transmits this M roadbed station to be modeled as respectively and is meant by 6 main 6 road signals directly:
Described mimo channel simulator obtains the channel elements in 6 main footpaths respectively with the matrix element addition of the 20 strips space channel directly in each bar master footpath; M roadbed station transmitted multiply by the channel elements in 6 main footpaths respectively, obtain 6 road signals by 6 main footpaths.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101692174A CN101998455A (en) | 2009-08-21 | 2009-08-21 | Test method and test system for spatial radio-frequency performance of multi-antenna system |
| PCT/CN2009/075574 WO2011020268A1 (en) | 2009-08-21 | 2009-12-14 | Test method and test system for spatial radio frequency performance of a multi-antenna system |
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| CN2009101692174A CN101998455A (en) | 2009-08-21 | 2009-08-21 | Test method and test system for spatial radio-frequency performance of multi-antenna system |
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| WO (1) | WO2011020268A1 (en) |
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| CN103428746A (en) * | 2013-07-18 | 2013-12-04 | 北京邮电大学 | Space performance verification method and system of multi-antenna device |
| CN103650389A (en) * | 2011-07-06 | 2014-03-19 | 安耐特通信有限公司 | Over-the-air test |
| CN105827340A (en) * | 2016-03-17 | 2016-08-03 | 北京邮电大学 | Method and device for determining probe position in anechoic chamber |
| CN106471383A (en) * | 2014-01-30 | 2017-03-01 | 兰洛斯公司 | Method and apparatus for test and the radio communication of vehicle |
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- 2009-12-14 WO PCT/CN2009/075574 patent/WO2011020268A1/en active Application Filing
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| US20080056340A1 (en) * | 2006-07-24 | 2008-03-06 | Michael Foegelle | Systems and methods for over the air performance testing of wireless devices with multiple antennas |
| CN101299858A (en) * | 2007-04-30 | 2008-11-05 | 大唐移动通信设备有限公司 | Signal processing device, method and intelligent antenna test system using said apparatus |
| CN101387680A (en) * | 2008-11-04 | 2009-03-18 | 信息产业部通信计量中心 | Multi-mould radio installation electromagnetical disturbance test system |
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| CN103650389A (en) * | 2011-07-06 | 2014-03-19 | 安耐特通信有限公司 | Over-the-air test |
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| CN106471383A (en) * | 2014-01-30 | 2017-03-01 | 兰洛斯公司 | Method and apparatus for test and the radio communication of vehicle |
| CN105827340A (en) * | 2016-03-17 | 2016-08-03 | 北京邮电大学 | Method and device for determining probe position in anechoic chamber |
| CN105827340B (en) * | 2016-03-17 | 2018-05-08 | 北京邮电大学 | A kind of probe location for inhaling ripple darkroom determines method and device |
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| Publication number | Publication date |
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| WO2011020268A1 (en) | 2011-02-24 |
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Application publication date: 20110330 |