CN102917397A - Measuring device and measuring method for wireless channel on basis of phased antenna array - Google Patents
Measuring device and measuring method for wireless channel on basis of phased antenna array Download PDFInfo
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- CN102917397A CN102917397A CN2012103763068A CN201210376306A CN102917397A CN 102917397 A CN102917397 A CN 102917397A CN 2012103763068 A CN2012103763068 A CN 2012103763068A CN 201210376306 A CN201210376306 A CN 201210376306A CN 102917397 A CN102917397 A CN 102917397A
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Abstract
The invention relates to a measuring device for a wireless channel on the basis of a phased antenna array. The measuring device comprises a remote unit and a master hub unit. The remote unit comprises the phased antenna array, the master hub unit comprises a first optical transceiver, an intermediate-frequency subsystem, a base band subsystem, a GPS (global positioning system) receiver and a data management server which are sequentially communicated with one another, a disk array is further arranged in the data management server, the phased antenna array comprises antenna radiation units, a beam forming network, a radiofrequency subsystem and a second optical transceiver which are sequentially communicated with one another, and the second optical transceiver is communicated with the first optical transceiver by a cable. The invention further discloses a measuring method implemented by the measuring device for measuring the wireless channel. The measuring device and the measuring method have the advantages that beam pointing of the phased antenna array is controlled to perform spatial scanning, so that space-domain characteristics of the wireless channel can be quickly and accurately measured, and are quickly and accurately measured in a bidirectional manner in quasi-real time under the action of switching of transmitting and receiving of the measuring device for the wireless channel, and the receiving sensitivity of the measuring device is improved.
Description
Technical field
The present invention relates to a kind of means for channel measurement and method of measurement, especially relate to a kind of wireless channel measurement device and method of measurement based on the phased array antenna array, belong to wireless communication technology field.
Background technology
In wireless communication system, wireless channel is the transmission medium of information, and the propagation characteristic of wireless channel has direct impact to systematic function.When any wireless communication system of design, must understand the propagation characteristic of wireless channel in depth, with the performance of optimization system.Wireless channel measurement is the direct way of understanding radio channel characteristic, can obtain channel data in the true environment by channel measurement, what comprise path loss model, power-delay line, channel transfer functions, the expansion of root mean square time delay, coherence time, electric wave leaves angle and the angle of arrival, etc.On this basis, can carry out statistical analysis to each channel parameter, and according to the result who analyzes, use rational mathematical method, set up wireless channel model.
For realizing high data rate, spectral efficient and high power radiation efficiency etc., in IMT-Advanced and future mobile communication system, will adopt the radio MIMO transmission technology, and the actual characteristic of the actual capacity of mimo system and radio wave propagation is closely related.Development along with communication system, people thirst for further improving the transmission rate of system, except time domain, frequency domain resource to channel are carried out the more deep exploitation, begin the spatial domain is developed, especially spatial information is also paid close attention in the introducing of MIMO and smart antenna, channel measurement and modeling more.For mimo system, its channel model is except considering the parameters such as path loss and time delay expansion, also need the spatial domain characteristic of clear and definite channel, for example electric wave is at the angle of arrival on angle and the reception antenna that leaves on the transmitting antenna, sending and receiving power is in the distribution of angle domain, correlation of transmitt or receive signal etc. on the bay separated by a distance.In the wireless transmission environment of reality, the channel measurement data are most important for mimo channel modeling and capacity analysis etc.And for research and development, deployment, optimization and the system performance analysis etc. of the mobile communication system that adopts the MIMO transmission technology, the accurate estimation of channel measurement result, modeling and power system capacity all will be played basic and guiding effect.
The method of obtaining by experiment at present channel spatial domain characteristic information mainly contains gain directional antenna scanning and array in conjunction with high-resolution DOA algorithm, the former principle is visual and understandable, utilize the high-gain narrow beam antenna 0 ~ 360 ° scope interscan, thereby directly obtain the distribution of wave power on angle, it is larger that shortcoming is that the result that directly measures is affected by antenna pattern, and the size of narrow beam directional antenna can be larger, give to make and test to be with and serve inconvenience, need to adopt the mode of machinery rotation to carry out spacescan during actual measurement, limited speed descends for the obvious channel measurement result precision of time-varying characteristics; The latter's benefit is that precision is high, makes complexity but shortcoming is whole system, and algorithm is directly related with the form of test antenna array, and the calibration of whole system needs very large workload, and the subsequent treatment amount of calculation is large.
Summary of the invention
Goal of the invention: the present invention provides a kind of wireless channel measurement device and method of measurement based on the phased array antenna array for accuracy and the validity of the spatial domain angular spread feature measurement that improves wireless channel.
Technical scheme: a kind of wireless channel measurement device based on the phased array antenna array, it is characterized in that, comprise remote termination and near-end machine, described remote termination comprises a phased array antenna array, described near-end machine then comprises the first optical transceiver that order is communicated with, the intermediate frequency subsystem, baseband subsystems, GPS receiver and data management server, also be provided with disk array in the described data management server, described phased array antenna array then comprises the antenna radiation unit that order is communicated with, Wave-packet shaping network, Radio Frequency Subsystem and the second optical transceiver, described the second optical transceiver and the first optical transceiver are communicated with by cable, wherein, data management server is used for the data that record is measured, and partial parameters is carried out real-time monitored and result show, and the GPS(global positioning system) receiver is used for providing the reference frequency of high stability, benchmark timing, and the information such as current longitude and latitude and translational speed.
Further, described GPS receiver comprises GPS and tames rubidium atomic clock, for measuring system provides accurate location and timing information.
A kind ofly utilize above-mentioned method of carrying out wireless channel measurement based on the wireless channel measurement device of phased array antenna array, it is characterized in that, may further comprise the steps:
(1) beam position of the phased array antenna array of setting transmitting terminal;
(2) beam position of the phased array antenna array of setting receiving terminal;
(3) utilize the wireless channel measurement device based on the phased array antenna array to carry out wireless channel measurement, and record measuring state and data;
(4) change the described transmitting terminal of step (1) into receiving terminal, and change the described receiving terminal of step (2) into transmitting terminal, then utilize the wireless channel measurement device based on the phased array antenna array to carry out wireless channel measurement, and record measuring state and data;
(5) beam. position of the phased array antenna array of the described receiving terminal of change step (2), and repeating step (3) and step (4) are until all beam. position of the phased array antenna array of receiving terminal are measured complete;
(6) beam. position of the phased array antenna array of the described transmitting terminal of change step (1), and repeating step (3), step (4) and step (5) are until all beam. position of the phased array antenna array of transmitting terminal are measured complete.
Beneficial effect: the present invention carries out spacescan by the beam position of control phased array antenna array, can carry out accurately measuring fast to the spatial domain characteristic of wireless channel, the Transmit enable of while combining wireless means for channel measurement, can carry out quasi real time bidirectional measurement to the spatial domain characteristic of wireless channel, and owing to having adopted active phased array antenna, improved the receiving sensitivity of measurement mechanism.
Description of drawings
Fig. 1 is the structural representation of wireless channel measurement device of the present invention;
Fig. 2 is the structural representation of phased array antenna array of the present invention;
Fig. 3 is the flow chart of wireless channel measurement method of the present invention.
The main mark implication is as follows among the figure:
1, phased array antenna array 2, the first optical transceiver 3, intermediate frequency subsystem
4, GPS receiver 5, baseband subsystems 6, data management server
7, power supply 11, the second optical transceiver 12, Radio Frequency Subsystem
13, Wave-packet shaping network 14, antenna radiation unit 61, disk array.
Embodiment
The below is elaborated to technical solution of the present invention, but protection scope of the present invention is not limited to described embodiment.
Embodiment:Fig. 1 is the structural representation of wireless channel measurement device of the present invention; Fig. 2 is the structural representation of phased array antenna array of the present invention;
As depicted in figs. 1 and 2: a kind of wireless channel measurement device based on the phased array antenna array, comprise remote termination and near-end machine, described remote termination comprises a phased array antenna array 1, described near-end machine then comprises the first optical transceiver 2 that order is communicated with, intermediate frequency subsystem 3, baseband subsystems 5, GPS receiver 4 and data management server 6, and the power supply 7 that electricity is provided for near-end machine, also be provided with disk array 61 in the described data management server 6, described phased array antenna array 1 then comprises the antenna radiation unit 14 that order is communicated with, Wave-packet shaping network 13, Radio Frequency Subsystem 12 and the second optical transceiver 11, described the second optical transceiver 11 and the first optical transceiver 2 are communicated with by cable, wherein, data management server 6 is used for the data that record is measured, and partial parameters is carried out real-time monitored and result show, GPS receiver 4 then is used for providing the reference frequency of high stability, benchmark regularly, and the information such as current longitude and latitude and translational speed, and in the present embodiment, described GPS receiver 4 comprises the taming rubidium atomic clock of GPS.
In the present embodiment, described phased array antenna array 1 can arrange specific phase place to each antenna radiation unit 14 by Wave-packet shaping network 13, thereby so that the radiation beam of phased array antenna array 1 is pointed to the angle that needs, realize the function of beam scanning.When the operating state of described wireless channel measurement device based on the phased array antenna array is receiving mode, after the Radio Frequency Subsystem 12 of phased array antenna array 1 is processed the signal that receives, be converted to light signal by the second optical transceiver 11, then be sent to the first optical transceiver 2 of near-end machine through optical cable, then being transformed to the intermediate frequency subsystem 3 and the baseband subsystems 5 that enter near-end machine behind the signal of telecommunication processes, store data at last in the disk array 61 in the data management server 6, carry out extraction and the specificity analysis of wireless channel parameter for the later stage.
When the operating state of described wireless channel measurement device based on the phased array antenna array is emission state, data management server 6 in the near-end machine produces the baseband signal that needs, enter baseband subsystems 3 and intermediate frequency subsystem 5 after taming position that rubidium atomic clock provides and temporal information in conjunction with GPS, then enter the first optical transceiver 2 through baseband subsystems 3 and intermediate frequency subsystem 5, and be converted into light signal, then by second optical transceiver 11 of optical cable transmission to remote termination, again be converted to the Radio Frequency Subsystem 12 that enters behind the signal of telecommunication in the phased array antenna array, Radio Frequency Subsystem 12 arrives the frequency that needs with the signal frequency conversion of receiving, then amplify, behind Wave-packet shaping network 13, enter each antenna radiation unit 14 and radiate, form at last predetermined beam position in the space.
In addition, described wireless channel measurement device based on the phased array antenna array is supported Radio over fiber(RoF) technology, can be good at supporting the measurement scene of distributing cell.
Fig. 3 is the flow chart of wireless channel measurement method of the present invention.
As shown in Figure 3: a kind ofly utilize above-mentioned method of carrying out wireless channel measurement based on the wireless channel measurement device of phased array antenna array, may further comprise the steps:
(1) beam position of the phased array antenna array of setting transmitting terminal;
(2) beam position of the phased array antenna array of setting receiving terminal;
(3) utilize the wireless channel measurement device based on the phased array antenna array to carry out wireless channel measurement, and record measuring state and data;
(4) change the described transmitting terminal of step (1) into receiving terminal, and change the described receiving terminal of step (2) into transmitting terminal, then utilize the wireless channel measurement device based on the phased array antenna array to carry out wireless channel measurement, and record measuring state and data;
(5) beam. position of the phased array antenna array of the described receiving terminal of change step (2), and repeating step (3) and step (4) are until all beam. position of the phased array antenna array of receiving terminal are measured complete;
(6) beam. position of the phased array antenna array of the described transmitting terminal of change step (1), and repeating step (3), step (4) and step (5) are until all beam. position of the phased array antenna array of transmitting terminal are measured complete.
Wherein be specially: when utilizing the wireless channel measurement device based on the phased array antenna array of the present invention to carry out wireless channel measurement, the present invention can be set to the phase array antenna beam of transmitting terminal a preposition, then the receiving terminal phase array antenna beam scans in horizontal plane or in the vertical plane, wireless channel measurement device record is corresponding to the data of each wave beam, perhaps the beam. position of fixed reception end utilizes the transmitting terminal wave beam to scan; And carry out the transmitting-receiving two-end reciprocity when measuring, then the phased array antenna of transmitting-receiving two-end all can be set to a fixing beam. position, carry out one-shot measurement and record the result, then in the constant situation of the beam. position that keeps phased array antenna, exchange function with transmitting-receiving two-end, be that original transmitting terminal changes receiving terminal into, receiving terminal originally changes transmitting terminal into, and then carries out DATA REASONING one time.
Above-mentioned wave beam based on the phased array antenna array in the wireless channel measurement device of phased array antenna array can point to the position that needs, carry out spacescan, above-mentioned method has then been utilized the controlled scan characteristic of wave beam of phased array antenna array, has realized the spatial domain characteristic of wireless channel is measured.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make in the form and details various variations to it.
Claims (3)
1. wireless channel measurement device based on the phased array antenna array, it is characterized in that, comprise remote termination and near-end machine, described remote termination comprises a phased array antenna array, described near-end machine then comprises the first optical transceiver that order is communicated with, the intermediate frequency subsystem, baseband subsystems, GPS receiver and data management server, also be provided with disk array in the described data management server, described phased array antenna array then comprises the antenna radiation unit that order is communicated with, Wave-packet shaping network, Radio Frequency Subsystem and the second optical transceiver, described the second optical transceiver and the first optical transceiver are communicated with by cable.
2. a kind of wireless channel measurement device based on the phased array antenna array according to claim 1 is characterized in that, described GPS receiver comprises GPS and tames rubidium atomic clock.
3. one kind is utilized method of carrying out wireless channel measurement based on the wireless channel measurement device of phased array antenna array claimed in claim 1, it is characterized in that, may further comprise the steps:
(1) beam. position of the phased array antenna array of setting transmitting terminal forms specific beam position;
(2) beam. position of the phased array antenna array of setting receiving terminal forms specific beam position;
(3) utilize the wireless channel measurement device based on the phased array antenna array to carry out wireless channel measurement, and record measuring state and data;
(4) change the described transmitting terminal of step (1) into receiving terminal, and change the described receiving terminal of step (2) into transmitting terminal, then utilize the wireless channel measurement device based on the phased array antenna array to carry out wireless channel measurement, and record measuring state and data;
(5) beam. position of the phased array antenna array of the described receiving terminal of change step (2), and repeating step (3) and step (4) are until all beam. position of the phased array antenna array of receiving terminal are measured complete;
(6) beam. position of the phased array antenna array of the described transmitting terminal of change step (1), and repeating step (3), step (4) and step (5) are until all beam. position of the phased array antenna array of transmitting terminal are measured complete.
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| WO2015176316A1 (en) * | 2014-05-23 | 2015-11-26 | 华为技术有限公司 | Multi-beam forming device and base station |
| CN110999136A (en) * | 2017-05-31 | 2020-04-10 | 弗劳恩霍夫应用研究促进协会 | Device, measurement system for testing device and operation method thereof |
| CN112864624A (en) * | 2020-12-30 | 2021-05-28 | 上海擎昆信息科技有限公司 | Method and device for adjusting and controlling received wave beam and terminal antenna system |
| CN112929102A (en) * | 2019-12-06 | 2021-06-08 | 深圳市通用测试系统有限公司 | MIMO wireless terminal radio frequency performance diagnosis method, device and related equipment |
| CN113406402A (en) * | 2021-06-10 | 2021-09-17 | 北京交通大学 | Multi-path time delay angle power spectrum measuring method based on phased array |
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| WO2015176316A1 (en) * | 2014-05-23 | 2015-11-26 | 华为技术有限公司 | Multi-beam forming device and base station |
| CN110999136A (en) * | 2017-05-31 | 2020-04-10 | 弗劳恩霍夫应用研究促进协会 | Device, measurement system for testing device and operation method thereof |
| US11343002B2 (en) | 2017-05-31 | 2022-05-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus, measurement system for testing an apparatus and methods for operating the same |
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| CN112929102A (en) * | 2019-12-06 | 2021-06-08 | 深圳市通用测试系统有限公司 | MIMO wireless terminal radio frequency performance diagnosis method, device and related equipment |
| CN112864624A (en) * | 2020-12-30 | 2021-05-28 | 上海擎昆信息科技有限公司 | Method and device for adjusting and controlling received wave beam and terminal antenna system |
| CN112864624B (en) * | 2020-12-30 | 2022-12-13 | 上海擎昆信息科技有限公司 | Method and device for adjusting and controlling received wave beam and terminal antenna system |
| CN113406402A (en) * | 2021-06-10 | 2021-09-17 | 北京交通大学 | Multi-path time delay angle power spectrum measuring method based on phased array |
| CN113406402B (en) * | 2021-06-10 | 2022-07-22 | 北京交通大学 | Multi-path time delay angle power spectrum measuring method based on phased array |
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Application publication date: 20130206 |