CN108337021A - A kind of extensive MIMO performances conduction test system - Google Patents
A kind of extensive MIMO performances conduction test system Download PDFInfo
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- CN108337021A CN108337021A CN201810190539.6A CN201810190539A CN108337021A CN 108337021 A CN108337021 A CN 108337021A CN 201810190539 A CN201810190539 A CN 201810190539A CN 108337021 A CN108337021 A CN 108337021A
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- conduction test
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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
-
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The present invention proposes a kind of extensive MIMO performances conduction test system, including base station, M × N radio frequency matrixes, the base station is for sending out the roads M original signal, M × N radio frequencies matrix, which is used to receive the roads the M original signal that base station is sent out and the roads the M original signal received is converted to the roads N reception signal, is sent to terminal device, the roads M original signal and the roads N constitute M × N path channels between receiving signal, and each channel is equipped with attenuation module, phase shift block or decaying phase shift block.The present invention realizes the outfield channel circumstance of the simulation extensive antenna array base stations of 5G using the form of radio frequency matrix and channel instrument, and extensive MIMO performances conduction test system of the invention can meet the channel magnitude of thousands of streams simultaneously and phase changes simultaneously.
Description
Technical field
The present invention relates to antenna measurement technical field, especially a kind of extensive MIMO performances conduction test system.
Background technology
Extensive MIMO derives from phased array technology, and evolution becomes Cellular Networks multi-antenna communication system on this basis
System, extensive MIMO (Multiple Input Multiple Output) can utilize space multiplexing technique pole in the case where not increasing new frequency spectrum resource
Big promotion cell capacity and throughput；Extensive MIMO has networking flexibility (multipoint cooperative), anti-interference (space diversity), increases
The features such as strong covering (wave beam forming)；Extensive MIMO regards LTE, LTE+ as by industry, especially carries in the 5G epoch at present
Rise a vital method of spectrum utilization efficiency.
Extensive MIMO takes more and more important role during Communication Development, is particularly paid attention to by communication circle now,
But due to the complexity of its system and communication channel, it is always a difficult point to lead to its test method, and has many uncertainties.
The cellular communication industry in the whole world also can simulate this kind of channel without a set of ideal laboratory test environment so far.
Invention content
The present invention proposes a kind of extensive MIMO performances conduction test system, and the honeycomb for solving the existing whole world is logical
Letter industry can also simulate the problem of this kind of channel without a set of ideal laboratory test environment so far.
Realize that technical solution of the invention is：A kind of extensive MIMO performances conduction test system, including base station, M
× N radio frequency matrixes, the base station is for sending out the roads M original signal, and M × N radio frequencies matrix is for receiving the roads M that base station is sent out
Original signal and by the roads the M original signal received be converted to the roads N receive signal be sent to terminal device, the original letter in the roads M
Number the roads N receive signal between constitute M × N path channels, attenuation module or phase shift block are equipped on each channel or decaying moves
Phase module, M, N are positive integer.
Compared with prior art, the present invention its remarkable advantage is：(1) extensive MIMO performances conduction test system of the invention
System can meet channel magnitude, phase or the amplitude of thousands of streams simultaneously and phase changes simultaneously；(2) extensive MIMO of the invention
Can all can serve as independent channel unit in each channel in conduction test system, on Channel Elements the amplitude of radio-frequency information stream and
Phase can arbitrarily change.(3) current techniques product is used as T/R transceiving devices for military and satellite antenna battle array rear end,
The present invention is mainly still applied on channel simulation, extends the characteristic of its test application in addition to T/R being used as to use, this
It is that preceding technology is unexistent.(4) test 5G base stations are can be not only used for, and the following 5G mobile phones can be tested, belonged to and do not occurred
Advanced communication test set..
Further detailed description is done to the present invention below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is a kind of schematic diagram of extensive MIMO performances conduction test system of the present invention
Fig. 2 is 1 test environment schematic diagram of the embodiment of the present invention.
Fig. 3 is the schematic diagram of the embodiment of the present invention 1.
Fig. 4 is 2 test environment schematic diagram of the embodiment of the present invention.
Fig. 5 is the actual principle figure in simulation test darkroom of the present invention.
Fig. 6 is beam gain scanning figure of the M × N radio frequencies matrix of the present invention in 0~360 degree of angle.
Fig. 7 is that the present invention realizes 3D wave beam simulated effect figures.
Specific implementation mode
In conjunction with shown in Fig. 1 and Fig. 2, (Multiple Input Multiple Output, technology refer to by a kind of extensive MIMO
Multiple transmitting antennas and reception antenna are used respectively in transmitting terminal and receiving terminal) performance conduction test system, including base station, M × N
Radio frequency matrix, for sending out the roads M original signal, it is former that M × N radio frequencies matrix is used to receive the roads M that base station is sent out for the base station
Beginning signal and by the roads the M original signal received be converted to the roads N receive signal be sent to terminal device, the roads M original signal
And the roads N receive composition M × N path channels between signal, and attenuation module or phase shift block or decaying phase shift are equipped on each channel
Module, M, N are positive integer.
In further embodiment, M × N radio frequencies matrix is invertible matrix.It i.e. also can be using the ends M as output port, N
End is used as output port.
In further embodiment, M × N radio frequencies matrix includes M input port and N number of output port, each defeated
Inbound port is designed with 1/N RF Power Splitters, and for that original signal will be divided into the roads N signal all the way, each output port is designed with one
A 1/M radio frequencies combiner receives signal all the way for the roads M original signal to be combined into.
In further embodiment, the attenuation module or phase shift block or decaying phase shift block are located at 1/N radio frequency work(point
On the interface channel of device and 1/M radio frequency combiners.
In further embodiment, the attenuation module or phase shift block or decaying phase shift block are reversible module, i.e.,
1/N radio frequency work(sub-modules can be equal to 1/N radio frequencies combining module and use, and 1/M radio frequencies combining module can be equal to 1/M radio frequency work(point
Module uses.
Further include channel instrument in further embodiment, the channel instrument is located at M × N radio frequency matrixes in conjunction with shown in Fig. 4
Between terminal device.
In further embodiment, the output port of M × N radio frequencies matrix is corresponded with the input port of channel instrument
Connection.
In further embodiment, M 8,16,32,64 or 128, N 1,2,4,8,16,32,64 or 128.
In further embodiment, M 32,64, N 4,8,16,32.
In further embodiment, the attenuation module includes X radio frequency attenuator, and the phase shift block includes Y and penetrates
Frequency phase shifter, the decaying phase shift block includes X radio frequency attenuator and Y radio-frequency phase shifter, and X, Y are positive integer.
In conjunction with shown in Fig. 5, the present invention establishes the model of ideal communication channel using M × N radio frequencies matrix, i.e. each battle array
Sub and each UE antenna has channel map relationship, and the amplitude in each channel and phase can be controlled freely.
In conjunction with shown in Fig. 6, it can be seen that theoretical simulation and measured result match very much, hence it is demonstrated that utilizing M × N radio frequency squares
Battle array can meet the simulated conditions of ideal communication channel.
M × N radio frequency matrixes through the invention realize following multipath simulation：
LOS diameters：
A LOS at any angle in simulation channel model is put by the physical location of a dual-polarized probe
Diameter.
NLOS diameters：
The NLOS diameters of simulation any angle and certain extended corner are put by two dual-polarized probe physical locations.
CLUSTER：
The channel scenario for the more CLUSTER for simulating standard channel model requirement is put by the position of multiple probes.
To realize following several 5G channel tests cases：
Inside darkroom, an ideal width phase matrix of 64X2 is formed between a probe and antenna for base station battle array；For phase
For bit matrix, we can assign phasing matrix as one " virtual darkroom "；Utilize the matrix resource of 64X2 in width phase matrix
We can simulate a probe；So the 64X2 resources of width phase matrix can be with one LOS diameter of model；The 64X4's of width phase matrix
Resource can simulate a NLOS diameter；Width phase matrix is used to simulate AOA the and AS channel parameters in LOS/NLOS diameters；Channel instrument is used
In simulating the AOD in LOS/NLOS diameters, time delay decays, the parameters such as noise and Doppler.
To simulate the extensive antenna measurement scenes of following 5G：
(1) single user wave beam forming performance
Simulation antenna BF gains and throughput performance under each 3D angles, are included in black under ± 90 ° special of tower
Position, the influence of verification LOS diameters and NLOS diameters to BF gains and throughput.
(2) wave beam tracking (walking, vehicle-mounted, high ferro scene) under single user situation of movement
Single user moves BF gains and the throughput for generating relative angle and velocity variations under base station.
(3) single user multithread scrnario testing
Highest is supported to 8 current test of single user.
(4) multi-user's multithread scrnario testing
Create the effect that the special position distribution of multi-user generates multithread；The secondary lobe of different user is tested to another user
Disturbed condition；Highest supports 4 users double fluid or the test of 8 user Dan Liu.
It is described in more detail with reference to embodiment.
Embodiment 1
In conjunction with shown in Fig. 2 and Fig. 3, in the present embodiment, by taking 64X16 radio frequency matrixes as an example, the extensive MIMO of the present embodiment
1024 paths phases and attenuation parameter variation can be realized in performance conduction test system.
The test environment of the present embodiment includes the base stations 5G, 64X16 radio frequencies matrix and mobile phone terminal, and the wherein base stations 5G are to be measured
The base stations 5G, mobile phone terminal be regular handset as cooperation 5G base station testings, the base stations 5G, 64X16 radio frequencies matrix and mobile phone are whole
It is that the form conducted by RF cable is attached between end.Wherein, 64X16 radio frequencies matrix is what inside was made of power division network
To the matrix channel of composition, there be amplitude and phase mode that can be separately adjustable in each radio-frequency channel for several radio-frequency channels
Block, and be simulation passive device, in conjunction with shown in Fig. 3,64X16 radio frequency matrixes are specially：
A1-A64 is the input port of 64X16 radio frequency matrixes, and B1-B16 is delivery outlet (A1-A64 of 64X16 radio frequency matrixes
It is alternatively delivery outlet, B1-B16 is input port), each input port of A port sides 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 input ports, which can be split, is divided into 1024 stream in total, similarly, B port sides
Each input port is connected to 1/64 radio frequency combiner, can 64 stream signals be combined into 1 tunnel and receive signal, so 1024 stream signals are most
16 tunnels have just been synthesized afterwards and have received signal output, are constituted mutually independent 1024 path channels between original signal and reception signal, are led to
It crosses chip controls and control to arbitrary aggregate channel can be realized.
On each path channels, it is equipped with several radio-frequency phase shifters, radio frequency attenuator and power splitter, for changing on channel
The arbitrary amplitude and phase of radio-frequency information stream, to simulate the decay of the amplitude-phase of radiofrequency signal and terminal space in space
The variation of position.
The base stations 5G in the present embodiment are the extensive mimo antenna base station of a new generation, and antenna rf end feedback mouth has 64,128
Even more, multiple antennas can form wave beam with antenna oscillator width phase correlation space-based, therefore all be between antenna oscillator
There is strong correlation.
Embodiment 2
In conjunction with shown in Fig. 4 and Fig. 7, in the present embodiment, by taking 8X4 radio frequency matrixes as an example, the extensive MIMO of the present embodiment
32 paths phases and attenuation parameter variation can be realized in energy conduction test system.
The test environment of the present embodiment includes the base stations 5G, 8X4 radio frequencies matrix, channel instrument and mobile phone terminal, the wherein base stations 5G
Be base stations 5G to be measured, mobile phone terminal it is regular handset as cooperation 5G base station testings, the base stations 5G, 8X4 radio frequencies matrix and hand
Machine terminal room is that the form conducted by RF cable is attached.Wherein, 8X4 radio frequencies matrix is that inside is made of power division network
Several radio-frequency channels be equipped with several radio-frequency phase shifter and work(point on each path channels to the matrix channel of composition
Device, for changing the arbitrary amplitude and phase of radio-frequency information stream on channel, to simulate the amplitude-phase of radiofrequency signal in space
Decay and terminal space position variation.Channel instrument is between 8X4 radio frequencies matrix and terminal device.8X4 radio frequency matrixes
The input port of output port and channel instrument connect one to one.
It after 8X4 radio frequencies matrix is as shown in Figure 7 formed the wave beam effect simulation of base station, is transmitted to inside channel instrument, believes
Road instrument can be added many outfield channel models, i.e., further simulate our actual lives on the basis of this wave beam effect
The middle scene using mobile communication, such as mobile phone signal can pass through between building, the actual propagations situation such as tunnel, high ferro, these letters
Number propagate process completed by channel instrument, finally arrive mobile phone again, be also equivalent to mobile phone and base station communicate when, pass through me
Channel simulation realize the effect made a phone call in real life at us, reach the final purpose of test.
Claims (10)
1. a kind of extensive MIMO performances conduction test system, which is characterized in that including base station, M × N radio frequency matrixes, the base
It stands for sending out the roads M original signal, M × N radio frequencies matrix is used to receive the roads the M original signal that base station is sent out and will receive
The roads M original signal be converted to the roads N and receive signal and be sent to terminal device, the roads M original signal and the roads N receive between signal
M × N path channels are constituted, attenuation module or phase shift block or decaying phase shift block are equipped on each channel, M, N are just whole
Number.
2. extensive MIMO performances conduction test system according to claim 1, which is characterized in that M × N radio frequencies square
Battle array is invertible matrix.
3. extensive MIMO performances conduction test system according to claim 1, which is characterized in that M × N radio frequencies square
Battle array includes M input port and N number of output port, and each input port is designed with 1/N RF Power Splitters, and being used for will be original all the way
Signal is divided into the roads N signal, and each output port is designed with a 1/M radio frequency combiner, for the roads M original signal to be combined into all the way
Receive signal.
4. extensive MIMO performances conduction test system according to claim 3, which is characterized in that the attenuation module or
Phase shift block or decaying phase shift block are located on the interface channel of 1/N RF Power Splitters and 1/M radio frequency combiners.
5. extensive MIMO performances conduction test system according to claim 1 or 4, which is characterized in that the decay mode
Block or phase shift block or decaying phase shift block are reversible module.
6. extensive MIMO performances conduction test system according to claim 1, which is characterized in that further include channel instrument,
The channel instrument is between M × N radio frequencies matrix and terminal device.
7. extensive MIMO performances conduction test system according to claim 6, which is characterized in that M × N radio frequencies square
The input port of the output port and channel instrument of battle array connects one to one.
8. extensive MIMO performances conduction test system according to claim 7, which is characterized in that M 8,16,32,64
Or 128, N 1,2,4,8,16,32,64 or 128.
9. extensive MIMO performances conduction test system according to claim 1, which is characterized in that M 32,64, N 4,
8、16、32。
10. extensive MIMO performances conduction test system according to claim 1, which is characterized in that the attenuation module
Including X radio frequency attenuator, the phase shift block includes Y radio-frequency phase shifter, and the decaying phase shift block includes that X radio frequency declines
Subtract device and Y radio-frequency phase shifter, X, Y are positive integer.
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| CN201810190539.6A CN108337021A (en) | 2018-03-08 | 2018-03-08 | A kind of extensive MIMO performances conduction test system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109547128A (en) * | 2019-01-15 | 2019-03-29 | 南京捷希科技有限公司 | The method for rapidly testing of Massive MIMO end to end performance |
| CN110350965A (en) * | 2019-08-22 | 2019-10-18 | 深圳市万普拉斯科技有限公司 | Beam switching method, device and mobile terminal |
| CN110875789A (en) * | 2018-08-29 | 2020-03-10 | 大唐移动通信设备有限公司 | Multi-antenna platform capability test method and device |
| CN110873824A (en) * | 2018-08-31 | 2020-03-10 | 南京捷希科技有限公司 | Massive MIMO antenna test system and method |
| CN111181660A (en) * | 2020-01-22 | 2020-05-19 | 南京捷希科技有限公司 | Channel simulation device and method |
| CN111413553A (en) * | 2020-04-02 | 2020-07-14 | 南京捷希科技有限公司 | Antenna test system and test method |
| 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 |
| CN113162708A (en) * | 2020-01-22 | 2021-07-23 | 南京捷希科技有限公司 | Large-scale terminal simulation system and test 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072060A (en) * | 2006-05-08 | 2007-11-14 | 中兴通讯股份有限公司 | Method for simulating space transmission environment for multi-input multi-output system |
| CN104871583A (en) * | 2012-10-08 | 2015-08-26 | 网件公司 | Near-field mimo wireless test systems, structures, and processes |
| CN106034308A (en) * | 2015-01-19 | 2016-10-19 | 是德科技股份有限公司 | System and method for testing multi-user multiple-input multiple-output system |
| CN107181547A (en) * | 2017-06-15 | 2017-09-19 | 北京中科国技信息***有限公司 | The method and apparatus for obtaining MIMO OTA test system center powers |
| US9866294B1 (en) * | 2016-09-19 | 2018-01-09 | Rohde & Schwarz Gmbh & Co. Kg | Method for testing a multiple-input and multiple-output device and test system |
-
2018
- 2018-03-08 CN CN201810190539.6A patent/CN108337021A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072060A (en) * | 2006-05-08 | 2007-11-14 | 中兴通讯股份有限公司 | Method for simulating space transmission environment for multi-input multi-output system |
| CN104871583A (en) * | 2012-10-08 | 2015-08-26 | 网件公司 | Near-field mimo wireless test systems, structures, and processes |
| CN106034308A (en) * | 2015-01-19 | 2016-10-19 | 是德科技股份有限公司 | System and method for testing multi-user multiple-input multiple-output system |
| US9866294B1 (en) * | 2016-09-19 | 2018-01-09 | Rohde & Schwarz Gmbh & Co. Kg | Method for testing a multiple-input and multiple-output device and test system |
| CN107181547A (en) * | 2017-06-15 | 2017-09-19 | 北京中科国技信息***有限公司 | The method and apparatus for obtaining MIMO OTA test system center powers |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110875789A (en) * | 2018-08-29 | 2020-03-10 | 大唐移动通信设备有限公司 | Multi-antenna platform capability test method and device |
| CN110875789B (en) * | 2018-08-29 | 2021-01-26 | 大唐移动通信设备有限公司 | Multi-antenna platform capability test method and device |
| CN110873824A (en) * | 2018-08-31 | 2020-03-10 | 南京捷希科技有限公司 | Massive MIMO antenna test system and method |
| CN109547128A (en) * | 2019-01-15 | 2019-03-29 | 南京捷希科技有限公司 | The method for rapidly testing of Massive MIMO end to end performance |
| CN110350965A (en) * | 2019-08-22 | 2019-10-18 | 深圳市万普拉斯科技有限公司 | Beam switching method, device and mobile terminal |
| CN110350965B (en) * | 2019-08-22 | 2021-10-29 | 深圳市万普拉斯科技有限公司 | Beam switching method and device and mobile terminal |
| CN111181660A (en) * | 2020-01-22 | 2020-05-19 | 南京捷希科技有限公司 | Channel simulation device and method |
| 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 |
| CN113162708A (en) * | 2020-01-22 | 2021-07-23 | 南京捷希科技有限公司 | Large-scale terminal simulation system and test 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 |
| CN113162661B (en) * | 2020-01-22 | 2022-05-27 | 南京捷希科技有限公司 | Beam forming equipment and beam forming method |
| CN113162708B (en) * | 2020-01-22 | 2024-03-15 | 南京捷希科技股份有限公司 | Large-scale terminal simulation system and test method |
| CN111413553A (en) * | 2020-04-02 | 2020-07-14 | 南京捷希科技有限公司 | Antenna test system and test method |
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