CN109547128A - The method for rapidly testing of Massive MIMO end to end performance - Google Patents
The method for rapidly testing of Massive MIMO end to end performance Download PDFInfo
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- CN109547128A CN109547128A CN201910036357.8A CN201910036357A CN109547128A CN 109547128 A CN109547128 A CN 109547128A CN 201910036357 A CN201910036357 A CN 201910036357A CN 109547128 A CN109547128 A CN 109547128A
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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
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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
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
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- Spectroscopy & Molecular Physics (AREA)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention proposes a kind of Massive MIMO end to end performance method for rapidly testing, if every road original signal that base station issues all is divided into main line radiofrequency signal first, determine the phase and amplitude of every road radiofrequency signal；Then every road radiofrequency signal is controlled according to the phase and amplitude of determining every road radiofrequency signal；If output is to mobile terminal after finally merging above-mentioned main line radiofrequency signal, to realize that the spatial position change between simulating mobile terminal and base station forms MU-MIMO and 3D-Beamforming.The present invention replaces OTA using conduction regime, the test of end to end performance simple terms can be rapidly completed, and easy to operate.
Description
Technical field
The invention belongs to antenna measurement technical field, specially a kind of quick test of Massive MIMO end to end performance
Method.
Background technique
There are two key technologies in 5G Massive MIMO: MU-MIMO (multi-user) and 3D-Beamforming (3D wave
Beam figuration), network capacity can be promoted by multiple-user space division multiplexing gain, the latter can realize the covering requirement of several scenes.Institute
With in the development phase of base station or terminal, performance test end to end is often also based on the two key technologies test user
Rate and handling capacity, but the channel scenario of 3GPP is complicated, development phase generally requires the performance under fast verification wave beam forming,
So a kind of easily and rapidly method is needed to be tested.
As shown in Figure 1, the MIMO performance test methods of mainstream are to pass through the cloth in darkroom using MIMO OTA scheme at present
Multiple dual polarized antenna probes, cooperate the rotation of measured piece, simulate real space environment, but have its defect:
1, in order to realize 3D channel model, it is enough quantity need to be planted on entire spherical surface or horizontal plane and vertical plane
Probe, it is expensive；
2, OTA system building is complicated, and test is not flexible, and more to research and development and emergency task test, which is brought, greatly chooses
War.
Summary of the invention
It is an object of the invention to propose a kind of method for rapidly testing of Massive MIMO end to end performance.
Realize technical solution of the invention are as follows: a kind of Massive MIMO end to end performance method for rapidly testing leads to
Cross the spatial position change changed in conductive link between the amplitude and phase simulating mobile terminal and base station of radiofrequency signal to be measured
Form MU-MIMO and 3D-Beamforming, specific steps are as follows:
If every road original signal that base station issues all is divided into main line radiofrequency signal by step 1, every road radiofrequency signal is determined
Phase and amplitude, specifically: the phase difference between every road is calculated according to beam angle and phase difference relationship, so that it is determined that every road is penetrated
The phase of frequency signal, mobile terminal as needed calculate free space loss with respect to the distance of base station to obtain every road radio frequency letter
Number amplitude；
Step 2 controls every road radiofrequency signal according to the phase and amplitude of determining every road radiofrequency signal；
If step 3 exports after merging above-mentioned main line radiofrequency signal to mobile terminal.
Preferably, if every road original signal that step 1 issues base station is all divided into main line radiofrequency signal method particularly includes:
1/N radio frequency function sub-module is respectively provided on the every road output channel in base station, the module will be for that will be divided into the road N, N per original signal all the way
For the receiving port quantity of mobile terminal.
Preferably, step 1 calculates the calculation formula of the phase difference between every road according to beam angle and phase difference relationship are as follows:
Wherein, Δ Phase indicates inter-channel phase difference, and d indicates base station a period of time spacing, and θ indicates that beam angle, λ indicate wave
It is long.
Preferably, the mobile terminal that step 1 is simulated as needed calculates the meter of free space loss with respect to the distance of base station
Calculate formula are as follows:
Loss=32.4+20log (f)+20log (D)
Wherein, Loss indicates free space loss, and f indicates frequency, and D indicates distance of the mobile terminal with respect to base station.
Preferably, the tool of every road radiofrequency signal is controlled in step 2 according to the phase and amplitude of determining every road radiofrequency signal
Body method are as follows: phase shift and attenuation module are set in every road radio frequency signal channel, and radiofrequency signal is carried out by computer bus
Phase and amplitude control.
Preferably, if step 3 exports after merging main line radiofrequency signal to mobile terminal method particularly includes: in each shifting
The receiving port setting 1/M radio frequency of dynamic terminal is combined module, which is used to the road the M original signal that base station issues being combined into 1 tunnel
Flow signal.
Preferably, connect again with mobile terminal if first accessing channel simulator instrument after merging main line radiofrequency signal in step 3
It connects.
Compared with prior art, the present invention its remarkable advantage are as follows: 1) present invention replaces OTA using conduction regime, can be fast
Speed completes the test of end to end performance simple terms, and easy to operate；2) present invention by computer directly control phase and amplitude with
MU-MIMO and 3D-Beamforming is simulated, it is low in cost.
Further detailed description is done to the present invention with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is current MIMO OTA performance test scheme schematic diagram.
Fig. 2 is specific implementation system schematic of the invention.
Fig. 3 is the equipment inner topology figure of specific implementation system of the invention.
Fig. 4 is the specific implementation system schematic that channel simulator instrument is added in the present invention.
Specific embodiment
A kind of Massive MIMO end to end performance method for rapidly testing, by changing radiofrequency signal to be measured in conductive link
Amplitude and phase simulating mobile terminal and base station between spatial position change formed MU-MIMO and 3D-Beamforming.
Specific steps are as follows:
If every road original signal that base station issues all is divided into main line radiofrequency signal by step 1, every road radiofrequency signal is determined
Phase and amplitude；
If there be M emission port in base station, for emitting the road M original signal, the road the M road Zhong Mei is provided with 1/N radio frequency function point
Module, the module will all be divided into the road N per original signal all the way, i.e., original signal is divided into N stream signal all the way, then the road M original signal
It is divided into the road M × N, constitutes the radio-frequency channel of the road M × N；N flows in signal, and every one stream signal represents a mobile terminal or mobile terminal
An antenna (user may correspond to mutiple antennas), N stream signal represents the N root day of N number of mobile terminal or mobile terminal
Line or multiple mobile terminals, each there is more antennas, the quantity of the receiving port of the mobile terminal of N, that is, total so as to form
Multi-user's condition of MU-MIMO.
In certain embodiments, the range of M × N be no more than 256 × 256, it is preferable that the range of M × N be no more than 64 ×
64。
With phase difference relationship calculate the phase difference between every road according to beam angle so that it is determined that every road radiofrequency signal phase
, the calculation formula of the phase difference between every road are as follows:
Wherein, Δ Phase indicates inter-channel phase difference, and d indicates base station a period of time spacing, and θ indicates beam angle.With antenna array
Sub- spacing isFor, with the direction mobile terminal sighting distance AOA, it is desirable to form 15 ° of level, vertical 0 ° of azimuth, substitute into respectively θ=
15 ° and θ=0 °, calculating horizontal direction phase difference is 46.58 °, and vertical direction phase difference is 0 °.
Mobile terminal as needed calculates free space loss with respect to the distance of base station to obtain every road radiofrequency signal
Amplitude, the calculation formula of free space loss are as follows:
Loss=32.4+20log (f)+20log (D)
Wherein, Loss indicates free space loss, and f indicates frequency, and D indicates distance of the mobile terminal with respect to base station.With
For 3.5GHz, it is assumed that base station and terminal are apart from being 40 meters, then free space loss between the two is 75.36dB.
Step 2 controls every road radiofrequency signal according to the phase and amplitude of determining every road radiofrequency signal；In some embodiments
In, specific practice are as follows: phase shift and attenuation module are set in every road radio frequency signal channel, and radio frequency letter is carried out by computer bus
Number phase and amplitude control.
If step 3, will above-mentioned main line radiofrequency signal merge after output to mobile terminal, in some embodiments, in each shifting
The receiving port setting 1/M radio frequency of dynamic terminal is combined module, and the road the M original signal that base station issues is combined into 1 road stream signal.
In other embodiments, connect again with mobile terminal if first accessing channel simulator instrument after main line radiofrequency signal is merged
It connects.By the way that channel model, simulating mobile terminal usage scenario is added to channel simulator instrument.
The present invention replaces OTA by the method for conduction, by establishing Multi-channel matrix, is simulated using matrix output port more
User, then by changing radiofrequency signal to be measured in the amplitude and phase simulating mobile terminal in conductive link and the sky between base station
Between change in location formed MU-MIMO and 3D-Beamforming scene.
Crucial parameter is receiving end angle of arrival (θ there are two in the test of Massive MIMO end to end performanceAOA) and
Transmitting terminal leaves angle (θAOD), the former is the direction sighting distance AOD relative to base station array direction between the base station and the mobile terminal,
The latter is the direction sighting distance AOA between base station and mobile terminal relative to mobile terminal array direction.The deflection of AOD and AOA
Available formula calculates:
Under normal circumstances, there is the output of M (M >=16, M are even number) road radiofrequency signal in base station, and mobile terminal has N (0≤N≤4, N
For even number) road signal receives, in order to realize wave beam forming, needs the M road port of base station generating letter according to certain phase difference
Number be irradiated to the road N receive in all the way, this is a wave beam, in order to realize multi-beam, it is necessary to according to identical or different phase
Potential difference generates signal and is almost irradiated to the road N simultaneously.In this regard, using matrixing, make in the road the M radiofrequency signal of base station per all the way into
Enter 1/N radio frequency function sub-module, which will all be divided into the road N per original signal all the way, then the road M original signal is divided into the road M × N, structure
At the radio-frequency channel of the road M × N, each port setting 1/M radio frequency of mobile terminal is combined module, which can close the road M original signal
For 1 stream signal, the road M × N signal is merged into N stream signal, while being often provided with adjustable damping and Adjustable Phase Shift mould on the way
Block or adjustable damping phase shift block realize multi-user beam by bus marco phase shift and decaying.According still further to the row of antenna for base station
Arrangement and column arrangement, setting port phase is poor, realizes the wave beam forming angle under 3D.
Embodiment 1
As shown in Figure 2 to 3, the specific implementation of Massive MIMO end to end performance method for rapidly testing of the invention
Are as follows:
The test environment of the present embodiment includes base station, mobile phone terminal, and wherein base station has 64 emission ports, for emitting
64 tunnel original signals, mobile phone terminal share 16, each emission port A of base station is connected to 1/16 RF Power Splitter, will be first-class
Original signal, which is split, is divided into 16 streams, and 64 stream original signals of 64 output ports, which can be split, is divided into 1024 stream in total, similarly, each
The input port mobile phone terminal B is all connected to 1/64 radio frequency combiner, 64 stream signals can be combined into 1 tunnel and receive signal, original signal and connect
Mutually independent 1024 path channels are constituted between the collection of letters number, the control to any combination channel can be realized by computer control
System.
Phase shift and attenuation module are set in every road radio frequency signal channel, and carry out the phase of radiofrequency signal by computer bus
Position and amplitude control, by change the amplitude and phase simulating mobile terminal and base station of radiofrequency signal to be measured in conductive link it
Between spatial position change formed MU-MIMO and 3D-Beamforming scene.
Embodiment 2
On the basis of embodiment 1, after 64 stream signals are combined into 1 tunnel reception signal by 1/64 radio frequency combiner, by the road
Signal inputs to channel simulator instrument, by the way that channel model, analogue mobile phone terminal usage scenario is added to channel simulator instrument.
Claims (7)
1. a kind of Massive MIMO end to end performance method for rapidly testing, which is characterized in that by change conductive link on to
The spatial position change surveyed between the amplitude and phase simulating mobile terminal and base station of radiofrequency signal forms MU-MIMO and 3D-
Beamforming, specific steps are as follows:
If every road original signal that base station issues all is divided into main line radiofrequency signal by step 1, the phase of every road radiofrequency signal is determined
And amplitude, specifically: the phase difference between every road is calculated according to beam angle and phase difference relationship, so that it is determined that every road radio frequency is believed
Number phase, mobile terminal as needed with respect to the distance of base station calculate free space loss to obtain every road radiofrequency signal
Amplitude；
Step 2 controls every road radiofrequency signal according to the phase and amplitude of determining every road radiofrequency signal；
If step 3 exports after merging above-mentioned main line radiofrequency signal to mobile terminal.
2. Massive MIMO end to end performance method for rapidly testing according to claim 1, which is characterized in that step 1
If every road original signal that base station issues all is divided into main line radiofrequency signal method particularly includes: on the every road output channel in base station
It is respectively provided with 1/N radio frequency function sub-module, which is the receiving port of mobile terminal for that will be divided into the road N, N per original signal all the way
Quantity.
3. Massive MIMO end to end performance method for rapidly testing according to claim 1, which is characterized in that step 1
The calculation formula of the phase difference between every road is calculated according to beam angle and phase difference relationship are as follows:
Wherein, Δ Phase indicates inter-channel phase difference, and d indicates base station a period of time spacing, and θ indicates that beam angle, λ indicate wavelength.
4. Massive MIMO end to end performance method for rapidly testing according to claim 1, which is characterized in that step 1
The mobile terminal simulated as needed calculates the calculation formula of free space loss with respect to the distance of base station are as follows:
Loss=32.4+20log (f)+20log (D)
Wherein, Loss indicates free space loss, and f indicates frequency, and D indicates distance of the mobile terminal with respect to base station.
5. Massive MIMO end to end performance method for rapidly testing according to claim 1, which is characterized in that step 2
According to the phase and amplitude of determining every road radiofrequency signal control every road radiofrequency signal method particularly includes: believe in every road radio frequency
The setting phase shift of number channel and attenuation module, and carry out by computer bus the phase and amplitude control of radiofrequency signal.
6. Massive MIMO end to end performance method for rapidly testing according to claim 1, which is characterized in that step 3
If output is to mobile terminal after main line radiofrequency signal is merged method particularly includes: be arranged in the receiving port of each mobile terminal
1/M radio frequency is combined module, which is used to for the road the M original signal that base station issues being combined into 1 road stream signal.
7. Massive MIMO end to end performance method for rapidly testing according to claim 1, which is characterized in that step 3
If first accessing channel simulator instrument after the middle merging by main line radiofrequency signal to connect with mobile terminal again.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133386A (en) * | 2019-05-05 | 2019-08-16 | 中国信息通信研究院 | A kind of antenna test method and equipment |
| CN111447017A (en) * | 2020-04-09 | 2020-07-24 | 广州通则康威智能科技有限公司 | Array antenna beam forming rapid test device and test method thereof |
| CN111551796A (en) * | 2020-04-15 | 2020-08-18 | 广州杰赛科技股份有限公司 | Testing device and method for 5G millimeter wave microstrip array antenna |
| CN112039608A (en) * | 2020-08-24 | 2020-12-04 | ***通信集团终端有限公司 | Method, device and equipment for evaluating multi-antenna terminal and computer storage medium |
| CN113162661A (en) * | 2020-01-22 | 2021-07-23 | 南京捷希科技有限公司 | Beam forming equipment and beam forming method |
| WO2021147250A1 (en) * | 2020-01-22 | 2021-07-29 | 南京捷希科技有限公司 | Radio frequency matrix and test system |
| CN113242062A (en) * | 2020-01-22 | 2021-08-10 | 南京捷希科技有限公司 | Method, device, equipment and medium for testing multi-input multi-output performance |
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| CN110133386A (en) * | 2019-05-05 | 2019-08-16 | 中国信息通信研究院 | A kind of antenna test method and equipment |
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| CN113242062A (en) * | 2020-01-22 | 2021-08-10 | 南京捷希科技有限公司 | Method, device, equipment and medium for testing multi-input multi-output performance |
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| CN111447017B (en) * | 2020-04-09 | 2021-04-30 | 广州通则康威智能科技有限公司 | Array antenna beam forming rapid test device and test method thereof |
| CN111551796A (en) * | 2020-04-15 | 2020-08-18 | 广州杰赛科技股份有限公司 | Testing device and method for 5G millimeter wave microstrip array antenna |
| CN111551796B (en) * | 2020-04-15 | 2022-04-12 | 广州杰赛科技股份有限公司 | Testing device and method for 5G millimeter wave microstrip array antenna |
| CN112039608A (en) * | 2020-08-24 | 2020-12-04 | ***通信集团终端有限公司 | Method, device and equipment for evaluating multi-antenna terminal and computer storage medium |
| CN112039608B (en) * | 2020-08-24 | 2022-10-04 | ***通信集团终端有限公司 | Method, device and equipment for evaluating multi-antenna terminal and computer storage medium |
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