CN101848045B - Method for measuring reference direction of dual-polarization intelligent antenna business beam - Google Patents
Method for measuring reference direction of dual-polarization intelligent antenna business beam Download PDFInfo
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Abstract
本发明提供了一种测量双极化智能天线业务波束的基准方向的方法，包括步骤：选取以待测双极化智能天线阵列所在的地理位置为圆心，以一定距离为半径的均匀分布在圆上的N个测试点，测得圆心及N个测试点的地理位置信息；扫频仪分别外接与待测双极化智能天线的某一极化方式相同的接收天线，在待测点测量，分别获取待测智能天线系统在不同极化方式下的波束幅度方向图；将获得的两张方向图合成获得新的方向图；新的方向图上主波束的两个半功率点之间的中线即对应业务波束的基准方向。本方法克服了现有的依靠工程师目测和经验确定基准方向的缺陷，为双极化智能天线的外场测试中准确测量移动终端的方位和业务波束的波达角提供了有利条件。
The invention provides a method for measuring the reference direction of a dual-polarized smart antenna service beam, comprising the steps of: selecting the geographical location where the dual-polarized smart antenna array to be measured is located as the center of the circle, and taking a certain distance as the radius to be evenly distributed in a circle N test points on the network, the center of the circle and the geographic location information of the N test points are measured; the frequency scanner is respectively externally connected to a receiving antenna with the same polarization mode as the dual-polarized smart antenna to be tested, and measured at the point to be tested, Obtain the beam amplitude patterns of the smart antenna system to be tested under different polarization modes; synthesize the obtained two patterns to obtain a new pattern; the midline between the two half-power points of the main beam on the new pattern That is, it corresponds to the reference direction of the service beam. This method overcomes the existing defect of relying on engineers' visual inspection and experience to determine the reference direction, and provides favorable conditions for accurately measuring the orientation of the mobile terminal and the angle of arrival of the service beam in the field test of the dual-polarization smart antenna.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to dual polarization 4 row 8 dual-four channel intelligent antennas that TD SDMA (TD-SCDMA) system adopts are judged the reference direction of business beam under the test condition of outfield method.
Background technology
Smart antenna is a key technology for PHY that adopts in the TD-SCDMA system, it adopts space division multiple access (SDMA) technology, utilize the difference of signal in transmission direction, with same frequency or same time slot, come with the signal distinguishing of code channel, maximally utilise limited channel resource.The core of smart antenna is beamforming algorithm and digital signal processor, produce in real time the weights of aerial array by adaptive algorithm, and utilize beam-forming network dynamically to adjust business beam, so that aiming at the useful signal upgoing wave, main beam reaches angle (DOA) direction, secondary lobe and zero falls into aims at other interference user directions, reaches the purpose that strengthens useful signal, suppresses interference signal.
In the field testing process of smart antenna, the reference direction of business beam is the necessary data that the ripple of measuring the orientation of portable terminal and business beam reaches the angle.The method that tradition is obtained professional wave beam reference direction is the experience that relies on the engineer, utilizes simple range estimation mode, with the direction of the indication of the intelligent antenna array reference direction as business beam own.Yet, because before smart antenna work, must carry out array calibration to it first, the unpredictability of the factor such as environment, weather will cause the amplitude of array element and phase place to change after calibration, the reference direction of the business beam by the range estimation acquisition will and the reference direction of practical business wave beam between have deviation.In addition, compare the single polarization intelligent antenna array, the intelligent bipolar antenna array row are comprised of the radiating element of mutually orthogonal polarised direction, and business beam has different propagation characteristics in different polarised directions, and this has further improved the difficulty of the reference direction of obtaining business beam.
The TD-SCDMA system adopts the time-division simultaneous techniques, the frequency range of uplink and downlink signals is identical, this is so that can directly apply to the figuration of downlink business wave beam according to the generation weights of uplink receiving signal, for the reference direction that adopts the present invention to measure intelligent antenna business beam under external field environment provides condition.
Summary of the invention
In order further to measure the DOA estimated value precision of business beam in the TD-SCDMA system, the invention provides a kind of method of measuring the reference direction of dual-polarization intelligent antenna business beam.
The present invention measures the method for the reference direction of dual-polarization intelligent antenna business beam, may further comprise the steps:
First step disposes the relevant parameter of dual-polarized smart antenna system to be measured, makes described dual-polarized smart antenna system be in normal operating conditions;
Second step take the geographical position of the aerial array of described dual-polarized smart antenna system as the center of circle, is radius at a certain distance, chooses N equally distributed test point on circular arc, obtains the geographical location information of a center of circle and N test point;
Third step, the external reception antenna of sweep generator makes the polarization mode of described reception antenna identical with a certain polarization mode of described dual-polarized smart antenna system;
The 4th step on the physical location of some points, is used the described average power intensity that sweep generator is measured described dual-polarized smart antenna system generation business beam to be measured within a period of time of stating in a described N test point,
The 5th step is measured the average power intensity of the dual-polarized smart antenna system generation business beam described to be measured on all N test point with the same method of the 4th step,
The 6th step, according to the azimuth of the relatively described aerial array of above-mentioned each test point, and average power intensity corresponding to each test point, describe the first polarised direction wave beam amplitude pattern A;
The 7th step is replaced the external reception antenna of this sweep generator, and the polarization mode of the antenna that adopts after replacing is identical with another polarization mode of described dual-polarized smart antenna system; Again according to the method for the 4th step to the six steps, draw the second polarised direction wave beam amplitude pattern B;
The 8th step is done synthetic calculating with the wave beam amplitude point that has the same orientation angle among directional diagram A and the directional diagram B, draws synthetic wave beam amplitude pattern C;
The 9th step obtains two azimuths that half-power point is corresponding of main beam among the directional diagram C, calculates the center line of these two azimuthal angles, and the azimuth that this center line is corresponding is the reference direction of business beam.
Preferably, described relevant parameter in the described first step comprises: access frequency point, access slot are that 3 time slots, public physic channel (PCCPCH) maximum transmission power 30dBm, Traffic Channel single-code channel transmitting power-18 ~+1, cell load are 0, close the control of inner and outer ring power, correction parameter, business beam weights, wherein the business beam weights are 8 one group of parameters of 8 array elements of the corresponding dual-polarization intelligent antenna of difference, and this group parameter is given business beam and pointed to reference direction.
Preferably, in described second step, the geographical location information of the N on the annulus that obtains point is the GPS positional information.
Preferably, in described third step, the external antenna of sweep generator is single-polarized antenna.
Preferably, in described the 8th step, when calculating the composite value of these two records, at first the unit of two records is converted into watt (Watt) or a milliwatt (MilliWatt) from the value of dBm (dBm), then two record value additions behind the conversion unit, then the unit of the value after the addition is converted into dBm from watt or milliwatt.
This method has proposed a kind of method of measuring the reference direction of dual-polarization intelligent antenna business beam, overcome existing dependence engineer range estimation and experience and determined the defective of reference direction, for the orientation of Measurement accuracy portable terminal in the field testing of dual-polarization intelligent antenna and the Bo Dajiao of business beam provide advantage.
Description of drawings
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is further described in detail.
Fig. 1 is the flow chart of method of judging the reference direction of business beam during according to the measurement dual-polarization intelligent antenna of the embodiment of the invention.
Fig. 2 shows the required concrete test environment schematic diagram of reference transmit direction of judging the business beam of dual-polarization intelligent antenna under condition of external field based on an example of the present invention.
Fig. 3 shows the first polarised direction amplitude pattern A according to the business beam of the weights sequence generation of setting based on an example of the present invention.
Fig. 4 shows the second polarised direction amplitude pattern B according to the business beam of the weights sequence generation of setting based on an example of the present invention.
Fig. 5 shows net amplitude directional diagram C according to the business beam of the weights sequence generation of setting based on an example of the present invention.
Embodiment
In the following description, provided some detail so that fully understanding a plurality of embodiment of the present invention.But, those skilled in the art do not have these details can realize the present invention as can be known yet.In other cases, there is not the known configurations of the device-dependents such as detailed expression or description and computer, transmission medium, measuring equipment, recording equipment, to avoid unnecessary interference to the description of the embodiment of the invention.
Unless content needs, otherwise in specification and claims, word " comprises " and change the meaning of " comprising " of being understood as that evolution, namely " includes, but are not limited to ".
The present invention proposes the method for a kind of combining with theoretical analysis and actual test, Effective Raise the accuracy of data analysis and the accuracy of conclusion.As shown in Figure 1, the method according to the reference direction of the business beam of the measurement dual-polarization intelligent antenna of present embodiment may further comprise the steps:
Step S01: the setup test system, test environment and the relevant parameter of configuration dual-polarization intelligent antenna make system be in normal operating conditions; Described relevant parameter comprises: access frequency point, access slot are that 3 time slots, public physic channel (PCCPCH) maximum transmission power 30dBm, Traffic Channel single-code channel transmitting power-18 ~+1, cell load are 0, close the control of inner and outer ring power, correction parameter, business beam weights, wherein the business beam weights are 8 one group of parameters of 8 array elements of the corresponding dual-polarization intelligent antenna of difference, this group parameter is given business beam and is pointed to reference direction, in this embodiment, these group weights are:
Wherein, weights 1 to 4 correspondence+45
04 bays of polarization mode, weights 5 to 8 correspondences-45
04 bays of polarization mode.
Judge the required concrete test environment of reference direction of business beam when wherein Fig. 2 shows the measurement smart antenna based on one embodiment of the present of invention;
Wherein, test macro comprises the test terminal, comprises driver test system one cover, the sweep generator of gps system, and the test terminal all directly links to each other with driver test system with sweep generator.
Preferably, the ground of test zone is more smooth, does not have the obstacles such as building, trees, pedestrian or vehicle in test specification.
Preferably, in the situation of base station system, in certain propagation distance, for example 300 meters, the signal of measuring in the angular region in the communications band that covers of business beam disturb, and require the certain hour section, for example 3 minutes, the time assembly average of interior noise fluctuations requires variance less than 3dBm less than-75dBm.
Preferably, in the parameter configuration of finishing the base station and open the base station, in the abundant preheating of system and the stable situation, require the received power of public physic channel signal of the antenna system emission that testing mobile phone measures greater than-63dBm.
Preferably, lock communications band and the time slot of above-mentioned base station by sweep generator, the propagation path number of measurement target residential quarter and the received power of every propagation path, require the propagation path number be 1 or the received power of article one propagation path than the received power of other propagation path greater than 10dBm.
Step S02: the antenna geographical position that examining system is treated in acquisition, take the antenna geographical position for the treatment of examining system as the center of circle, take fixing distance as radius, obtain the geographical position of N tested point on the corresponding annulus, this N tested point equidistantly distributes at annulus, and azimuthal angle in any two relative centers of circle of consecutive points is all identical.Present embodiment N=12, this moment, this angle was 30
0
Step S03: the external reception antenna of sweep generator, the polarization mode of this antenna and dual-polarized antenna array to be measured+45
0Polarization mode identical;
Step S04: obtain respectively one group of test data by the N of this sweep generator on an above-mentioned annulus point, every group of test data all includes from the power level value record of information within a period of time corresponding to base station prearranged signals, each described test data records to schedule interval record, can sweep generator be arranged with handing when mobile, and after moving to the target tested point, need to place sweep generator at a level altitude, for example 1 meter, then make the automatic record test data of this sweep generator, what sweep generator was tested is more than 2 minutes;
Step S05: for each tested point, the time point T1 that moves away of record hand, and T1 added the preceding paragraph regular time, for example 30 seconds, consequent new time point TS was as the zero-time of obtaining one group of test data record corresponding to this test point; TS is added the preceding paragraph regular time, for example 120 seconds, consequent new time point TE is as the concluding time of obtaining one group of test data record corresponding to this test point, for the above-mentioned log file of respectively organizing test data, find respectively data record time all data record between TS and TE, and these test datas are carried out respectively time statistical average according to different test points, and the time statistical average result who establishes any one group of test data of acquisition is P, unit is dBm;
Step S06: according to the azimuth of the relative base station of above-mentioned test point, and P value corresponding to each test point, describe wave beam amplitude pattern A according to standard method, as shown in Figure 3, this figure is based at the weights 1 to 4 described in the step S01, and wherein positive 90
0The positive north of azimuth representative, this curve is described to form by N corresponding azimuth and the assembly average of tested point, and [1] represents the azimuth that any one tested point is corresponding, and [2] represent the assembly average that this tested point is corresponding;
Step S07: replace the external reception antenna of this sweep generator, the polarization mode of the antenna that adopts after replacing is-45
0By this sweep generator, repeating step S04 to S06, wherein the wave beam amplitude pattern A that describes of step S06 replaces with wave beam amplitude pattern B, as shown in Figure 4, this figure is based at the weights 5 to 8 described in the step S01, showed treat examining system business beam in a certain polarization (for example-45
0) theory characteristic on the mode, wherein positive 90
0The positive north of azimuth representative, this curve is described to form by N corresponding azimuth and the assembly average of tested point, and [3] represent the azimuth that any one tested point is corresponding, and [4] represent the assembly average that this tested point is corresponding.
Step S8: wave beam amplitude pattern A and wave beam amplitude pattern B are merged, to produce final wave beam amplitude pattern C.The method of above-mentioned merging is as follows, any two measuring points that the azimuth is identical on correspondence direction figure A and the B, calculate this synthetic power of 2, as the wave beam amplitude pattern C performance number measuring point corresponding at above-mentioned azimuth, wherein synthetic power calculation adopts following formula with this synthetic power:
Wherein, the log10 function calculation be take 10 as base, the logarithm of the value in its bracket; V
DBm1Represent the performance number of a certain measuring point of amplitude pattern A, V
DBm2Represent the performance number of the identical measuring point of amplitude pattern B top parallactic angle, V
DBm3Represent the performance number of the identical measuring point of amplitude pattern C top parallactic angle, their unit all is dBm (dBm).
Step S09: obtain two half-power points of the main beam that directional diagram C describes, obtain these two half-power points each self-corresponding azimuth A1 and A2, unit is
0, when the absolute value of A1-A2 less than 180
0The time, the reference direction of the business beam of this antenna system is
When the absolute value of A1-A2 greater than 180
0The time, the reference direction of the business beam of this antenna system is
Wherein, in step S01, test macro comprises test terminal, driver test system (containing a gps system) cover, sweep generator, and the test terminal directly links to each other with driver test system, and sweep generator directly links to each other with driver test system.
As shown in Figure 5, the corresponding wave beam amplitude pattern of this figure C has showed the synthetic effect of the beam pattern of two kinds of different polarization modes, and wherein positive 90
0The positive north of azimuth representative, curve represent by the received power of describing according to azimuth corresponding to N tested point and composite value bent, and [5] and [6] represent respectively two half-power points, and [7] represent the reference direction angle of business beam.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. a method of measuring the reference direction of dual-polarization intelligent antenna business beam is characterized in that, may further comprise the steps:
First step disposes the relevant parameter of dual-polarized smart antenna system to be measured, makes described dual-polarized smart antenna system be in normal operating conditions;
Second step take the geographical position of the aerial array of described dual-polarized smart antenna system as the center of circle, is radius at a certain distance, chooses N equally distributed test point at circular arc, obtains the geographical location information of a center of circle and N test point;
Third step, the external reception antenna of sweep generator makes the polarization mode of described reception antenna identical with a certain polarization mode of described dual-polarized smart antenna system;
The 4th step on the physical location of some points, uses described sweep generator to measure the average power intensity of described dual-polarized smart antenna system generation business beam to be measured within a period of time in a described N test point,
The 5th step is measured the average power intensity of the dual-polarized smart antenna system generation business beam described to be measured on all N test point with the same method of the 4th step,
The 6th step, according to the azimuth of the relatively described aerial array of above-mentioned each test point, and average power intensity corresponding to each test point, describe the first polarised direction wave beam amplitude pattern A;
The 7th step is replaced the external reception antenna of this sweep generator, and the polarization mode of the antenna that adopts after replacing is identical with another polarization mode of described dual-polarized smart antenna system; Again according to the method for the 4th step to the six steps, draw the second polarised direction wave beam amplitude pattern B;
The 8th step is done synthetic calculating with the wave beam amplitude point that has the same orientation angle among directional diagram A and the directional diagram B, draws synthetic wave beam amplitude pattern C;
The 9th step obtains two azimuths that half-power point is corresponding of main beam among the directional diagram C, calculates the center line of these two azimuthal angles, and the azimuth that this center line is corresponding is the reference direction of business beam.
2. judge the method for the reference direction of business beam during measurement dual-polarization intelligent antenna according to claim 1, it is characterized in that, described relevant parameter in the first step comprises: access frequency point, access slot is 3 time slots, Primary Common Control Physical Channel maximum transmission power 30dBm, Traffic Channel single-code channel transmitting power-18 ~+1, cell load is 0, close the control of inner and outer ring power, correction parameter, the business beam weights, wherein the business beam weights are 8 one group of parameters of 8 array elements of the corresponding dual-polarization intelligent antenna of difference, and this group parameter is given business beam and pointed to reference direction.
3. judge the method for the reference direction of business beam during measurement dual-polarization intelligent antenna according to claim 1, it is characterized in that in described second step, the N on the annulus that obtains the geographical location information of putting is the GPS positional information.
4. judge the method for the reference direction of business beam during measurement dual-polarization intelligent antenna according to claim 1, it is characterized in that in described third step, the external antenna of sweep generator is single-polarized antenna.
5. judge the method for the reference direction of business beam during measurement dual-polarization intelligent antenna according to claim 1, it is characterized in that, in described the 8th step, when having the composite value of wave beam amplitude point at same orientation angle among calculated direction figure A and the directional diagram B, at first the unit of the wave beam amplitude point that has the same orientation angle among directional diagram A and the directional diagram B is converted into watt (Watt) or a milliwatt (Milliwatt) from the value of dBm (dBm), then two values addition behind the conversion unit, then the unit of the value after the addition is converted into dBm from watt or milliwatt.
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| CN102546049B (en) * | 2010-12-30 | 2014-10-01 | 中国移动通信集团湖北有限公司 | Antenna index calculation method and device |
| CN103634798B (en) * | 2012-08-22 | 2017-04-05 | 中兴通讯股份有限公司 | A kind of method and system is allocated by downlink traffic channel resource |
| CN103809042B (en) * | 2012-11-07 | 2016-12-21 | 中国移动通信集团湖北有限公司 | A kind of smart antenna field testing method and system |
| CN104053229B (en) | 2013-03-14 | 2018-09-28 | 南京中兴软件有限责任公司 | Mobile terminal, localization method and device |
| CN106712864B (en) * | 2017-01-20 | 2020-04-14 | 京信通信系统（中国）有限公司 | Method and device for testing and optimizing performance of intelligent antenna |
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| CN1700801A (en) * | 2005-07-08 | 2005-11-23 | 中兴通讯股份有限公司 | Downlink beamforming method in mobile communication intelligent antenna system |
| CN101069446A (en) * | 2005-09-13 | 2007-11-07 | 京瓷无线公司 | System and method for controlling antenna pattern |
| CN101084605A (en) * | 2004-09-10 | 2007-12-05 | 美商内数位科技公司 | Measurement support for a smart antenna in a wireless communication system |
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| CN101084605A (en) * | 2004-09-10 | 2007-12-05 | 美商内数位科技公司 | Measurement support for a smart antenna in a wireless communication system |
| CN1700801A (en) * | 2005-07-08 | 2005-11-23 | 中兴通讯股份有限公司 | Downlink beamforming method in mobile communication intelligent antenna system |
| CN101069446A (en) * | 2005-09-13 | 2007-11-07 | 京瓷无线公司 | System and method for controlling antenna pattern |
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