WO2011097900A1 - Method and system for spatial radio frequency performance test based on multi-antenna system - Google Patents

Method and system for spatial radio frequency performance test based on multi-antenna system Download PDF

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Publication number
WO2011097900A1
WO2011097900A1 PCT/CN2010/078213 CN2010078213W WO2011097900A1 WO 2011097900 A1 WO2011097900 A1 WO 2011097900A1 CN 2010078213 W CN2010078213 W CN 2010078213W WO 2011097900 A1 WO2011097900 A1 WO 2011097900A1
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signal
test
spatial
path
antenna
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PCT/CN2010/078213
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French (fr)
Chinese (zh)
Inventor
郭阳
郑欣宇
禹忠
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中兴通讯股份有限公司
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Publication of WO2011097900A1 publication Critical patent/WO2011097900A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
    • H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/29—Performance testing

Definitions

  • the present invention relates to radio frequency testing technology, and in particular to a spatial RF performance testing method and system based on a multi-antenna system. Background technique
  • TRP total Radiated Power
  • TRS Total Radiated Sensitivity
  • CTIA Cellular Communication Standardization Association
  • TRP and TRS should meet certain limit requirements.
  • TRP, TRS and other indicators are generally tested in traditional darkrooms.
  • MIMO multi-antenna technology communication equipment and communication terminals
  • the traditional darkroom cannot evaluate the spatial RF performance of multi-antenna terminals. Therefore, it is necessary to add new equipment to form a new darkroom test solution based on the traditional darkroom. Evaluating the spatial RF performance of MIMO systems and terminal antennas.
  • the current international standards have not specified the test methods and test procedures for radio frequency indicators under multi-antenna systems. To this end, the present invention aims to provide a multi-antenna system.
  • the space RF performance test method and system is not specified.
  • the main object of the present invention is to provide a spatial radio frequency performance testing method and system based on a multi-antenna system, which can test the radio frequency performance of a multi-antenna terminal space.
  • the present invention provides a spatial RF performance testing method based on a multi-antenna system, comprising: a channel simulator outputting a path signal according to a signal input by a base station signal simulator to a branching device; the branching device will come from the channel according to a predetermined mapping relationship The path signal of the simulator is mapped to the test antenna in the full electromagnetic wave absorption darkroom;
  • the test antenna transmits a spatial signal according to a path signal from the branching device
  • the device under test receives the spatial signal, and then the spatial RF performance analysis and display module analyzes and displays the spatial RF performance of the device under test according to the spatial signal received by the device under test.
  • the mapping relationship between the path signal from the channel simulator and the test antenna is determined as follows: According to the estimation of the angle of arrival direction and the range of the angular extension of the path signal, the mapping relationship between the path signal from the channel simulator and the test antenna is determined.
  • the mapping relationship between the path signal from the channel simulator and the test antenna is: estimating the angle of arrival of the path signal, obtaining an angle of arrival direction of the path signal and a range of corresponding angular spread; according to the arrival of the path signal Defining an angular spectrum extension range of the radial signal and determining a range of the angular expansion of the radial signal; determining that the radial signal is mapped to a test antenna within an extended range of the angular spectrum of the radial signal.
  • the number of the test antennas is not less than the number of channel simulator output paths.
  • the device to be tested is located at the center of the all-wave absorption darkroom, and the test antenna is located on the circumference centered on the device to be tested.
  • the spatial RF performance analysis and display module is implemented by a corresponding functional module in the test instrument/instrument; or the spatial RF performance analysis and display module is a separate Device.
  • the mapping the path signal to the test antenna is: combining the sub-path signals of the path signal according to the number of test antennas in the extended range of the angular signal spectrum, and transmitting the path signals to the test antenna, where the combined The number of sub-path signals corresponds to the number of test antennas within the extended range of the angular signal spectrum.
  • the invention also provides a spatial RF performance testing system based on a multi-antenna system, comprising: a base station signal simulator, a channel simulator, a branching device, an all-wave absorption darkroom, a test antenna, a device to be tested, and a spatial RF performance analysis and Display module; wherein
  • the base station signal simulator is configured to simulate a transmission signal of the base station and output the signal to the channel simulator; the channel simulator is configured to output a path signal to the branching device according to the signal input by the base station signal simulator;
  • the branching device is configured to map a path signal from the channel simulator to a test antenna in the all-wave absorption darkroom according to a predetermined mapping relationship
  • the test antenna is located in a full-wave absorption darkroom for transmitting a spatial signal according to a radial signal from the branching device;
  • the device to be tested is configured to receive a spatial signal sent by the test antenna
  • the spatial RF performance analysis and display module is configured to analyze and display spatial RF performance of the device under test according to the spatial signal received by the device under test.
  • the branching device is further configured to determine a mapping relationship between the path signal from the channel simulator and the test antenna according to an estimation of an angle of arrival direction and an angular extension range of the path signal, specifically: performing a path signal Obtaining an angle estimate, obtaining an angle of arrival direction of the radial signal and a range of corresponding angular spread; determining an angular extent of the radial signal according to an angle of arrival direction of the radial signal and a range of corresponding angular spread; determining the diameter The signal is mapped to the test antenna within the extended range of the radial signal angle.
  • the invention is based on a multi-antenna system spatial space performance test method and system, according to the letter Estimating the angle of arrival and the range of angular extension of the number, mapping the path signal output by the channel simulator to the test antenna according to a certain rule, and transmitting the spatial signal according to the mapped path signal by the test antenna, and then receiving the spatial signal according to the device under test
  • the spatial and radio frequency performance of the device under test is analyzed and displayed, thereby realizing the test of the radio frequency performance of the multi-antenna terminal space.
  • FIG. 1 is a schematic flowchart of a method for testing a spatial RF performance of a multi-antenna system according to the present invention
  • FIG. 2 is a schematic diagram of a method for randomly mapping signals between a track and a test antenna according to the present invention
  • FIG. 3 is a schematic structural diagram of a spatial RF performance test system based on a multi-antenna system according to the present invention
  • FIG. 4 is a schematic structural diagram of a spatial RF performance test system based on a multi-antenna system in the case where the number of test antennas is equal to the number of output channels of the channel simulator.
  • the basic idea of the present invention is: according to the estimation of the angle of arrival angle and the range of angular extension of the path signal, the path signal outputted by the channel simulator is mapped to the test antenna according to a certain rule, and the test antenna transmits the spatial signal according to the mapped path signal. Then, the spatial RF performance of the device to be tested is analyzed and displayed according to the spatial signal received by the device under test.
  • FIG. 1 is a schematic flowchart of a method for testing a spatial RF performance based on a multi-antenna system according to the present invention. As shown in FIG. 1, the method for testing a spatial RF performance based on a multi-antenna system generally includes the following steps:
  • Step 101 The base station signal simulator (BS emulator) simulates the transmission signal of the base station and outputs it to the channel simulator.
  • BS emulator The base station signal simulator
  • the base station signal simulator simulates the transmission signal of the base station, and outputs the transmission signal of the M base station, that is, the transmission signal of the M base station antenna.
  • Step 102 The channel simulator outputs a path signal to the branching device according to the signal input by the base station signal simulator.
  • the M-channel output signal of the base station simulator is input to the channel simulator to simulate the case where the base station signal passes through the spatial channel.
  • the channel simulator outputs the P-channel signal according to the M-channel output signal of the base station simulator, that is, each path The signal is one output signal. It should be noted that the value of P can be determined after determining the channel model used by the OTA.
  • the number N of test antennas is not less than the number of channel simulator output paths (i.e., the number of paths (main paths, clusters) of the channel model used) P, preferably, the number of test antennas N and the path of the channel model
  • the number P is equal.
  • the number of paths of the channel model defined by SCM, SCME, Winner l & II is 6 or 8, so the preferred value of the number N of single-polarized test antennas is 6 or 8, and for the case of dual polarization, the same antenna
  • the position is configured with two antennas that are mutually cross-polarized.
  • the preferred value of the number of test antennas N should be 6 X 2 or 8 X 2, that is, 12 or 16 It is noted that the number of test antennas may be equal to, but not limited to, the above preferred values.
  • test antennas are located in a full-wave absorption darkroom (such as an anechoic chamber, an anechoic chamber). These test antennas are located at different positions in the full-wave absorption darkroom.
  • the test antenna transmits signals with certain time and space characteristics.
  • Test multiple antenna devices terminals.
  • the device under test DUT
  • the test antenna is located on the circumference centered on the DUT. This is to ensure that the signals transmitted by the test antennas reach the DUT at the same time.
  • the DUT receives the signal from the space and processes the received signal, or transmits it through the cable and processes it to verify the received signal to complete the OTA test.
  • Step 103 The branching device maps the path signal from the channel simulator to the test antenna according to a predetermined mapping relationship.
  • the mapping of the path signal to the test antenna is: combining the path signals of the path signal according to the determined mapping relationship, and then mapping to the test antenna.
  • the number N of test antennas in the darkroom should be not less than (equal to or greater than) the number of paths (the same main path, the same cluster) of the channel model used.
  • the optimized number of test antennas is the path of the channel model.
  • the number of the test antenna N is not described as an example in which the number of test antennas N is not equal to the number of paths P.
  • each path is generally composed of W sub-paths.
  • the usual value of W is 20. Due to the excessive number of sub-paths, the operation of signal mapping is too complicated, so sub-path merging is required.
  • the merging can be performed by sub-path channel matrix element addition or vector addition.
  • each path contains 1 ⁇ K sub-paths, and K has a preferred value of 3. After sub-path merging, there are still P paths. , but there are 1 ⁇ K sub-paths in each path.
  • mapping relationship between the path signal from the channel simulator and the test antenna is determined as follows:
  • determining the mapping relationship between the path signal and the test antenna determines how to combine the sub-path signals of the path signal according to the number of test antennas in the extended range of the path signal angle.
  • the number and path of the combined sub-path signals The number of test antennas in the extended range of the signal angle corresponds to the number of test antennas.
  • the W sub-path signals of this path are merged into two sub-path signals and mapped into the darkroom. Test the antenna for spatial signal transmission.
  • the P-path signals can be mapped to the test antennas in the darkroom, as shown in Figure 2.
  • Step 104 The test antenna transmits a spatial signal according to a path signal from the branching device.
  • Step 105 The device under test receives a spatial signal.
  • Step 106 The spatial RF performance analysis and display module analyzes and displays the spatial RF performance of the device under test according to the spatial signal received by the device under test.
  • the signal from the space can be received by the DUT, and the received signal can be analyzed and sent to other devices for display.
  • the DUT can also transmit the received signal through the cable and analyze and display it by other devices.
  • OTA test In other words, the spatial RF performance analysis and display module sometimes needs to perform performance index analysis, sometimes only as a performance display. In practical applications, the spatial RF performance analysis and display module can be directly implemented by using the corresponding functional modules in the test instrument/instrument, ie: direct utilization Test instrument/instrument for performance analysis and performance display.
  • the spatial RF performance test based on the multi-antenna system of the present invention includes: a base station signal simulator 301, a channel simulator 302, and a point.
  • the channel simulator 302 is configured to output a path signal to the branching device 303 according to a signal input by the base station signal simulator;
  • the branching device 303 is configured to map the path signal from the channel simulator to the test antenna 305 in the all-wave absorption dark room 304 according to a predetermined mapping relationship; specifically, the path signal may be adopted by a mapping relationship similar to that shown in FIG. Map to the corresponding test antenna;
  • test antenna 305 located in the full electromagnetic wave absorption chamber 304, for transmitting a spatial signal based on a path signal from the branching device;
  • the device under test 306 is configured to receive a spatial signal sent by the test antenna.
  • the spatial RF performance analysis and display module 307 is configured to receive the space according to the device under test 306 The signal analyzes and displays the spatial RF performance of the device to be tested.
  • the branching device 303 is further configured to determine a mapping relationship between the path signal from the channel simulator and the test antenna according to the estimation of the angle of arrival and the range of the angular extension of the path signal, specifically:
  • the number of test antennas 305 is not less than the number of output paths of the channel simulator 302.
  • the device under test 306 is located at the center of the all-wave absorption darkroom 304, and the test antenna 305 is located on the circumference centered on the device under test.
  • the space RF performance analysis and display module 307 can be directly implemented using the corresponding functional modules in the test instrument/instrument, or it can be used as a separate device in the space RF performance test system.
  • FIG. 4 is a schematic structural diagram of a spatial RF performance test system based on a multi-antenna system according to an embodiment of the present invention.
  • the number of test antennas is equal to the number of output paths of the channel simulator.
  • the present invention provides a spatial RF performance test method and system based on a channel RF simulator (channel simulator) and a full-wave absorption darkroom, and how to establish a test environment to implement an OTA for a MIMO system (MIMO terminal)
  • the test and channel simulators regulate the signal processing, the relationship between the antenna and the signal in the full-wave absorption darkroom, and can effectively meet the requirements of the MIMO OTA.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

The present invention discloses a method for spatial radio frequency performance test based on a multi-antenna system. A splitting equipment maps the path signal from the channel emulator to test antennas in the fully anechoic chamber according to a predetermined mapping relationship; according to the spatial signal from the test antennas received by the device under test, the spatial radio frequency performance analysis and display module analyzes and displays the spatial radio frequency performance of the device under test, wherein the mapping relationship between the path signal from a channel emulator and the test antennas is determined based on the estimates of the arrival angel direction and angular spread scope of the path signal. The present invention also accordingly discloses a system for spatial radio frequency performance test based on the multi-antenna system. In the present invention, the path signal outputted from the channel emulator is mapped to the test antennas according to certain rules, and then the spatial radio frequency performance test is performed based on the spatial signal sent by the test antennas, thereby enabling the spatial radio performance test for the multi-antenna terminal.

Description

基于多天线***的空间射频性能测试方法及*** 技术领域  Space RF performance test method and system based on multi-antenna system
本发明涉及射频测试技术， 尤其涉及一种基于多天线***的空间射频 性能测试方法及***。 背景技术  The present invention relates to radio frequency testing technology, and in particular to a spatial RF performance testing method and system based on a multi-antenna system. Background technique
随着现代工业的发展， 各类无线通讯产品只有具备良好的发射和接收 性能才能保证通讯质量， 即总辐射功率 （Total Radiated Power, TRP )要高 于一定值、 总辐射灵敏度（Total Radiated Sensitivity, TRS )要低于一定值， 也就是说空间射频性能 （Over The Air， OTA ) 测试指标要良好。  With the development of modern industry, all kinds of wireless communication products can only guarantee the communication quality if they have good transmitting and receiving performance, that is, total Radiated Power (TRP) is higher than a certain value and total radiation sensitivity (Total Radiated Sensitivity, TRS) should be lower than a certain value, that is to say, the external radio frequency performance (Over The Air, OTA) test indicators should be good.
蜂窝通讯标准化协会（CTIA ) 为了保障移动终端设备在网络中正常使 用， 制定了移动终端空间射频性能的测试标准即 《The test plan for mobile station OTA performance)), 目前， 很多运营商都要求进入其网络的移动终端 空间射频性能要按照 CTIA标准要求进行测试， TRP、 TRS要满足一定的限 值要求。  In order to ensure the normal use of mobile terminal equipment in the network, the Cellular Communication Standardization Association (CTIA) has developed the test standard for mobile terminal space RF performance (The test plan for mobile station OTA performance). Currently, many operators require access to their networks. The radio frequency performance of the mobile terminal space should be tested in accordance with the requirements of the CTIA standard. TRP and TRS should meet certain limit requirements.
对于传统的单天线***和终端， 一般在传统暗室中进行 TRP、 TRS等 指标的测试， 随着目前 LTE等***即将产业化， 传统单天线***和设备将 会逐渐过度为带有多输入多输出（ MIMO )多天线技术的通信设备和通信终 端， 而传统暗室无法对多天线终端的空间射频性能进行性能评估， 所以， 需要在传统暗室的基础上添加新设备组成新型暗室的测试解决方案， 来评 估 MIMO***和终端天线的空间射频性能， 而目前的国际标准中尚未对多 天线***下的射频指标的测试方法和测试过程进行规定， 为此，本发明旨在 提供一种用于多天线***下的空间射频性能测试方法及***。 发明内容 For traditional single-antenna systems and terminals, TRP, TRS and other indicators are generally tested in traditional darkrooms. With the current industrialization of LTE and other systems, traditional single-antenna systems and devices will gradually become excessively multi-input and multi-output. (MIMO) multi-antenna technology communication equipment and communication terminals, while the traditional darkroom cannot evaluate the spatial RF performance of multi-antenna terminals. Therefore, it is necessary to add new equipment to form a new darkroom test solution based on the traditional darkroom. Evaluating the spatial RF performance of MIMO systems and terminal antennas. However, the current international standards have not specified the test methods and test procedures for radio frequency indicators under multi-antenna systems. To this end, the present invention aims to provide a multi-antenna system. The space RF performance test method and system. Summary of the invention
有鉴于此， 本发明的主要目的在于提供一种基于多天线***的空间射 频性能测试方法及***， 能够实现对多天线终端空间射频性能的测试。  In view of this, the main object of the present invention is to provide a spatial radio frequency performance testing method and system based on a multi-antenna system, which can test the radio frequency performance of a multi-antenna terminal space.
为达到上述目的， 本发明的技术方案是这样实现的：  In order to achieve the above object, the technical solution of the present invention is achieved as follows:
本发明提供了一种基于多天线***的空间射频性能测试方法， 包括： 信道模拟器根据基站信号模拟器输入的信号输出径信号至分路装置； 分路装置根据预先确定的映射关系将来自信道模拟器的径信号映射到 全电波吸收暗室中的测试天线；  The present invention provides a spatial RF performance testing method based on a multi-antenna system, comprising: a channel simulator outputting a path signal according to a signal input by a base station signal simulator to a branching device; the branching device will come from the channel according to a predetermined mapping relationship The path signal of the simulator is mapped to the test antenna in the full electromagnetic wave absorption darkroom;
测试天线根据来自分路装置的径信号发送空间信号；  The test antenna transmits a spatial signal according to a path signal from the branching device;
待测设备接收所述空间信号， 之后由空间射频性能分析与显示模块根 据所述待测设备接收的空间信号对所述待测设备的空间射频性能进行分析 及显示。  The device under test receives the spatial signal, and then the spatial RF performance analysis and display module analyzes and displays the spatial RF performance of the device under test according to the spatial signal received by the device under test.
其中 , 所述确定来自信道模拟器的径信号与测试天线的映射关系为： 根据对径信号的到达角方向及角扩展范围的估计， 确定来自信道模拟器的 径信号与测试天线的映射关系。  The mapping relationship between the path signal from the channel simulator and the test antenna is determined as follows: According to the estimation of the angle of arrival direction and the range of the angular extension of the path signal, the mapping relationship between the path signal from the channel simulator and the test antenna is determined.
其中， 所述确定来自信道模拟器的径信号与测试天线的映射关系为： 对径信号进行到达角估计， 得到径信号的到达角方向和相应的角扩展的范 围； 根据所述径信号的到达角方向和相应的角扩展的范围， 确定所述径信 号的角谱扩展范围； 确定所述径信号映射至所述径信号角谱扩展范围内的 测试天线。  The mapping relationship between the path signal from the channel simulator and the test antenna is: estimating the angle of arrival of the path signal, obtaining an angle of arrival direction of the path signal and a range of corresponding angular spread; according to the arrival of the path signal Defining an angular spectrum extension range of the radial signal and determining a range of the angular expansion of the radial signal; determining that the radial signal is mapped to a test antenna within an extended range of the angular spectrum of the radial signal.
上述方案中， 所述测试天线的数目不小于信道模拟器输出径的数目。 上述方案中， 待测设备位于全电波吸收暗室的中心位置、 测试天线位 于以待测设备为中心的圓周上。  In the above solution, the number of the test antennas is not less than the number of channel simulator output paths. In the above solution, the device to be tested is located at the center of the all-wave absorption darkroom, and the test antenna is located on the circumference centered on the device to be tested.
上述方案中， 所述空间射频性能分析与显示模块通过测试仪器 /仪表中 相应功能模块实现； 或者， 所述空间射频性能分析与显示模块为一单独的 装置。 In the above solution, the spatial RF performance analysis and display module is implemented by a corresponding functional module in the test instrument/instrument; or the spatial RF performance analysis and display module is a separate Device.
上述方案中， 所述将径信号映射到测试天线为： 根据所述径信号角谱 扩展范围内的测试天线数对径信号的子径信号进行合并， 再发送到测试天 线， 所述合并后的子径信号数目与所述径信号角谱扩展范围内的测试天线 数相对应。  In the above solution, the mapping the path signal to the test antenna is: combining the sub-path signals of the path signal according to the number of test antennas in the extended range of the angular signal spectrum, and transmitting the path signals to the test antenna, where the combined The number of sub-path signals corresponds to the number of test antennas within the extended range of the angular signal spectrum.
本发明还提供了一种基于多天线***的空间射频性能测试***， 包括： 基站信号模拟器、 信道模拟器、 分路装置、 全电波吸收暗室、 测试天线、 待测设备和空间射频性能分析与显示模块； 其中，  The invention also provides a spatial RF performance testing system based on a multi-antenna system, comprising: a base station signal simulator, a channel simulator, a branching device, an all-wave absorption darkroom, a test antenna, a device to be tested, and a spatial RF performance analysis and Display module; wherein
所述基站信号模拟器， 用于模拟基站的发射信号并输出至信道模拟器； 所述信道模拟器， 用于根据基站信号模拟器输入的信号输出径信号至 分路装置；  The base station signal simulator is configured to simulate a transmission signal of the base station and output the signal to the channel simulator; the channel simulator is configured to output a path signal to the branching device according to the signal input by the base station signal simulator;
所述分路装置， 用于根据预先确定的映射关系将来自信道模拟器的径 信号映射到全电波吸收暗室中的测试天线；  The branching device is configured to map a path signal from the channel simulator to a test antenna in the all-wave absorption darkroom according to a predetermined mapping relationship;
所述测试天线， 位于全电波吸收暗室中， 用于根据来自分路装置的径 信号发送空间信号；  The test antenna is located in a full-wave absorption darkroom for transmitting a spatial signal according to a radial signal from the branching device;
所述待测设备， 用于接收所述测试天线发送的空间信号；  The device to be tested is configured to receive a spatial signal sent by the test antenna;
所述空间射频性能分析与显示模块， 用于根据所述待测设备接收的空 间信号对所述待测设备的空间射频性能进行分析及显示。  The spatial RF performance analysis and display module is configured to analyze and display spatial RF performance of the device under test according to the spatial signal received by the device under test.
上述方案中， 所述分路装置， 还用于根据对径信号的到达角方向及角 扩展范围的估计， 确定来自信道模拟器的径信号与测试天线的映射关系， 具体为： 对径信号进行到达角估计， 得到径信号的到达角方向和相应的角 扩展的范围； 根据所述径信号的到达角方向和相应的角扩展的范围， 确定 所述径信号的角 扩展范围； 确定所述径信号映射至所述径信号角 "扩展 范围内的测试天线。  In the above solution, the branching device is further configured to determine a mapping relationship between the path signal from the channel simulator and the test antenna according to an estimation of an angle of arrival direction and an angular extension range of the path signal, specifically: performing a path signal Obtaining an angle estimate, obtaining an angle of arrival direction of the radial signal and a range of corresponding angular spread; determining an angular extent of the radial signal according to an angle of arrival direction of the radial signal and a range of corresponding angular spread; determining the diameter The signal is mapped to the test antenna within the extended range of the radial signal angle.
本发明基于多天线***的空间射频性能测试方法及***， 根据对径信 号的到达角方向及角扩展范围的估计， 按照一定规则将信道模拟器输出的 径信号映射到测试天线， 由测试天线根据映射后的径信号发送空间信号， 之后根据待测设备接收的空间信号对所述待测设备的空间射频性能进行分 析及显示， 从而实现对多天线终端空间射频性能的测试。 附图说明 The invention is based on a multi-antenna system spatial space performance test method and system, according to the letter Estimating the angle of arrival and the range of angular extension of the number, mapping the path signal output by the channel simulator to the test antenna according to a certain rule, and transmitting the spatial signal according to the mapped path signal by the test antenna, and then receiving the spatial signal according to the device under test The spatial and radio frequency performance of the device under test is analyzed and displayed, thereby realizing the test of the radio frequency performance of the multi-antenna terminal space. DRAWINGS
图 1为本发明基于多天线***的空间射频性能测试方法流程示意图； 图 2为本发明径与测试天线间信号随机映射方法示意图；  1 is a schematic flowchart of a method for testing a spatial RF performance of a multi-antenna system according to the present invention; FIG. 2 is a schematic diagram of a method for randomly mapping signals between a track and a test antenna according to the present invention;
图 3为本发明基于多天线***的空间射频性能测试***结构示意图； 图 4为测试天线的数目等于信道模拟器输出径的数目的情况下， 基于 多天线***的空间射频性能测试***结构示意图。 具体实施方式  3 is a schematic structural diagram of a spatial RF performance test system based on a multi-antenna system according to the present invention; FIG. 4 is a schematic structural diagram of a spatial RF performance test system based on a multi-antenna system in the case where the number of test antennas is equal to the number of output channels of the channel simulator. detailed description
本发明的基本思想是： 根据对径信号的到达角方向及角扩展范围的估 计， 按照一定规则将信道模拟器输出的径信号映射到测试天线， 由测试天 线根据映射后的径信号发送空间信号， 之后根据待测设备接收的空间信号 对所述待测设备的空间射频性能进行分析及显示。  The basic idea of the present invention is: according to the estimation of the angle of arrival angle and the range of angular extension of the path signal, the path signal outputted by the channel simulator is mapped to the test antenna according to a certain rule, and the test antenna transmits the spatial signal according to the mapped path signal. Then, the spatial RF performance of the device to be tested is analyzed and displayed according to the spatial signal received by the device under test.
图 1 为本发明基于多天线***的空间射频性能测试方法流程示意图， 如图 1 所示， 本发明基于多天线***的空间射频性能测试方法一般包括以 下步骤：  FIG. 1 is a schematic flowchart of a method for testing a spatial RF performance based on a multi-antenna system according to the present invention. As shown in FIG. 1, the method for testing a spatial RF performance based on a multi-antenna system generally includes the following steps:
步骤 101 : 基站信号模拟器（ BS emulator )模拟基站的发射信号并输出 至信道模拟器。  Step 101: The base station signal simulator (BS emulator) simulates the transmission signal of the base station and outputs it to the channel simulator.
例如，基站信号模拟器模拟基站的发射信号，输出 M路基站发射信号， 即 M根基站天线的发射信号。  For example, the base station signal simulator simulates the transmission signal of the base station, and outputs the transmission signal of the M base station, that is, the transmission signal of the M base station antenna.
步骤 102:信道模拟器根据基站信号模拟器输入的信号输出径信号至分 路装置。 这里， 基站模拟器的 M路输出信号输入至信道模拟器， 以模拟基站信 号通过空间信道的情况， 例如， 信道模拟器根据基站模拟器的 M路输出信 号输出 P路信号， 即每条径的信号为一路输出信号。 需要说明的是， 当确 定 OTA所使用的信道模型后即可以确定 P的取值。 Step 102: The channel simulator outputs a path signal to the branching device according to the signal input by the base station signal simulator. Here, the M-channel output signal of the base station simulator is input to the channel simulator to simulate the case where the base station signal passes through the spatial channel. For example, the channel simulator outputs the P-channel signal according to the M-channel output signal of the base station simulator, that is, each path The signal is one output signal. It should be noted that the value of P can be determined after determining the channel model used by the OTA.
本发明中， 测试天线的数目 N不小于信道模拟器输出径的数目 （即所 使用的信道模型的径（主径， 簇）的数目 ） P, 优选的， 测试天线数目 N与 信道模型的径的数目 P相等。 例如， 基于 SCM、 SCME、 Winner l & II定义 的信道模型的径的数目为 6或 8, 所以， 单极化测试天线数目 N的优选值 为 6或 8, 对于双极化情况， 在同一天线位置配置有相互交叉极化的 2根天 线， 为 V&H或倾斜的 X交叉极化， 所需要的测试天线数 N的优选值应为 6 X 2或 8 X 2根， 即 12或 16根， 需要说明的是， 测试天线数目可以等于但 不限于上述优选值。  In the present invention, the number N of test antennas is not less than the number of channel simulator output paths (i.e., the number of paths (main paths, clusters) of the channel model used) P, preferably, the number of test antennas N and the path of the channel model The number P is equal. For example, the number of paths of the channel model defined by SCM, SCME, Winner l & II is 6 or 8, so the preferred value of the number N of single-polarized test antennas is 6 or 8, and for the case of dual polarization, the same antenna The position is configured with two antennas that are mutually cross-polarized. For V&H or oblique X-cross polarization, the preferred value of the number of test antennas N should be 6 X 2 or 8 X 2, that is, 12 or 16 It is noted that the number of test antennas may be equal to, but not limited to, the above preferred values.
这里， 所有测试天线均位于全电波吸收暗室 （如消声暗室、 吸波暗室） 中， 这些测试天线位于全电波吸收暗室中的不同位置， 测试天线以一定的 时间和空间特性发送信号， 用以测试多天线设备（终端）。 具体的， 待测设 备（ device under test, DUT )一般位于全电波吸收暗室的中心位置， 测试天 线位于以 DUT为中心的圓周上， 这是为了保证各个测试天线所发送的信号 同时到达 DUT, 由 DUT接收来自空间的信号， 并对接收信号进行处理， 或 者，通过电缆线传出后进行处理，对接收到的信号进行验证，从而完成 OTA 测试。  Here, all test antennas are located in a full-wave absorption darkroom (such as an anechoic chamber, an anechoic chamber). These test antennas are located at different positions in the full-wave absorption darkroom. The test antenna transmits signals with certain time and space characteristics. Test multiple antenna devices (terminals). Specifically, the device under test (DUT) is generally located at the center of the all-wave absorption darkroom, and the test antenna is located on the circumference centered on the DUT. This is to ensure that the signals transmitted by the test antennas reach the DUT at the same time. The DUT receives the signal from the space and processes the received signal, or transmits it through the cable and processes it to verify the received signal to complete the OTA test.
步骤 103:分路装置根据预先确定的映射关系将来自信道模拟器的径信 号映射到测试天线。  Step 103: The branching device maps the path signal from the channel simulator to the test antenna according to a predetermined mapping relationship.
所述将径信号映射到测试天线为： 根据确定的映射关系对径信号的子 径信号进行合并， 再映射到测试天线。  The mapping of the path signal to the test antenna is: combining the path signals of the path signal according to the determined mapping relationship, and then mapping to the test antenna.
需要说明的是， 一般根据对径信号的到达角方向及角扩展范围的估计， 确定来自信道模拟器的径信号与测试天线的映射关系。 It should be noted that, generally, based on the estimation of the angle of arrival angle and the range of angular extension of the radial signal, The mapping relationship between the path signal from the channel simulator and the test antenna is determined.
根据前面所述， 暗室中测试天线的数目 N应该不小于 （等于或大于） 所使用的信道模型的径（同主径， 同簇）的数目 P, 测试天线数目的优化值 为信道模型的径的数目， 下面以测试天线 N的数目不等于径的数目 P为例 进行说明。  According to the foregoing, the number N of test antennas in the darkroom should be not less than (equal to or greater than) the number of paths (the same main path, the same cluster) of the channel model used. The optimized number of test antennas is the path of the channel model. The number of the test antenna N is not described as an example in which the number of test antennas N is not equal to the number of paths P.
多天线***中， 每条径一般由 W条子径组成， W通常的取值是 20, 由 于子径数目过多， 信号映射的操作过于复杂， 所以需要进行子径合并的处 理。 合并可以通过子径信道矩阵元素相加或矢量相加等方式进行， 合并处 理后每条径中含有 1 ~ K条子径， K的优选值为 3 , 进行子径合并后， 仍共 有 P条径， 但每条径中有 1 ~ K条子径。  In a multi-antenna system, each path is generally composed of W sub-paths. The usual value of W is 20. Due to the excessive number of sub-paths, the operation of signal mapping is too complicated, so sub-path merging is required. The merging can be performed by sub-path channel matrix element addition or vector addition. After the combination process, each path contains 1 ~ K sub-paths, and K has a preferred value of 3. After sub-path merging, there are still P paths. , but there are 1 ~ K sub-paths in each path.
本发明中， 所述确定来自信道模拟器的径信号与测试天线的映射关系 为：  In the present invention, the mapping relationship between the path signal from the channel simulator and the test antenna is determined as follows:
对径信号进行到达角估计， 得到径信号的到达角方向和相应的角扩展 的范围；  Estimating the angle of arrival of the radial signal, obtaining the direction of arrival angle of the radial signal and the range of corresponding angular expansion;
根据所述径信号的到达角方向和相应的角扩展的范围， 确定所述径信 号的角讲扩展范围；  Determining an angular extension range of the path signal according to an angle of arrival direction of the radial signal and a range of corresponding angular spread;
确定所述径信号映射至所述径信号角借扩展范围内的测试天线。  Determining that the path signal is mapped to the test antenna within the extended range of the path signal angle.
可以看出， 确定径信号与测试天线的映射关系即根据径信号角豫扩展 范围内的测试天线数确定如何对径信号的子径信号进行合并， 一般的， 合 并后的子径信号数目与径信号角傳扩展范围内的测试天线数相对应。  It can be seen that determining the mapping relationship between the path signal and the test antenna determines how to combine the sub-path signals of the path signal according to the number of test antennas in the extended range of the path signal angle. Generally, the number and path of the combined sub-path signals The number of test antennas in the extended range of the signal angle corresponds to the number of test antennas.
例如， 某条径的角语扩展范围为 20度〜 80度， 在这个范围内共有 2根 测试天线， 那么即将这条径的 W条子径信号合并为 2条子径信号， 并映射 至暗室中的测试天线进行空间信号传送。  For example, if the angle of a certain path extends from 20 degrees to 80 degrees, there are two test antennas in this range, then the W sub-path signals of this path are merged into two sub-path signals and mapped into the darkroom. Test the antenna for spatial signal transmission.
依据此方法可以对 P条径的信号分别映射至暗室中的测试天线，如图 2 所示。 步骤 104: 测试天线根据来自分路装置的径信号发送空间信号。 According to this method, the P-path signals can be mapped to the test antennas in the darkroom, as shown in Figure 2. Step 104: The test antenna transmits a spatial signal according to a path signal from the branching device.
步骤 105: 待测设备接收空间信号。  Step 105: The device under test receives a spatial signal.
步骤 106:空间射频性能分析与显示模块根据所述待测设备接收的空间 信号对所述待测设备的空间射频性能进行分析及显示。  Step 106: The spatial RF performance analysis and display module analyzes and displays the spatial RF performance of the device under test according to the spatial signal received by the device under test.
这里， 可以由 DUT接收来自空间的信号， 对接收信号进行分析后将分 析结果发送至其他设备进行显示， 也可以由 DUT通过电缆线将接收信号传 出后由其他设备进行分析及显示， 从而完成 OTA测试。 换言之， 空间射频 性能分析与显示模块有时需要进行性能指标分析， 有时仅仅作为性能显示； 实际应用中 , 空间射频性能分析与显示模块可以直接采用测试仪器 /仪表中 相应功能模块完成， 即： 直接利用测试仪器 /仪表进行性能分析及性能显示。  Here, the signal from the space can be received by the DUT, and the received signal can be analyzed and sent to other devices for display. The DUT can also transmit the received signal through the cable and analyze and display it by other devices. OTA test. In other words, the spatial RF performance analysis and display module sometimes needs to perform performance index analysis, sometimes only as a performance display. In practical applications, the spatial RF performance analysis and display module can be directly implemented by using the corresponding functional modules in the test instrument/instrument, ie: direct utilization Test instrument/instrument for performance analysis and performance display.
图 3 为本发明基于多天线***的空间射频性能测试***结构示意图， 如图 3 所示， 本发明基于多天线***的空间射频性能测试系包括： 基站信 号模拟器 301、 信道模拟器 302、 分路装置 303、 全电波吸收暗室 304、 测 试天线 305、 待测设备 306和空间射频性能分析与显示模块 307; 其中， 基站信号模拟器 301， 用于模拟基站的发射信号并输出至信道模拟器 3 is a schematic structural diagram of a spatial RF performance test system based on a multi-antenna system according to the present invention. As shown in FIG. 3, the spatial RF performance test based on the multi-antenna system of the present invention includes: a base station signal simulator 301, a channel simulator 302, and a point. The circuit device 303, the full-wave absorption darkroom 304, the test antenna 305, the device under test 306, and the spatial RF performance analysis and display module 307; wherein the base station signal simulator 301 is configured to simulate the transmit signal of the base station and output to the channel simulator
302; 302;
信道模拟器 302,用于根据基站信号模拟器输入的信号输出径信号至分 路装置 303;  The channel simulator 302 is configured to output a path signal to the branching device 303 according to a signal input by the base station signal simulator;
分路装置 303 ,用于根据预先确定的映射关系将来自信道模拟器的径信 号映射到全电波吸收暗室 304中的测试天线 305； 具体的， 可以采用类似图 2所示的映射关系将径信号映射到相应的测试天线上；  The branching device 303 is configured to map the path signal from the channel simulator to the test antenna 305 in the all-wave absorption dark room 304 according to a predetermined mapping relationship; specifically, the path signal may be adopted by a mapping relationship similar to that shown in FIG. Map to the corresponding test antenna;
测试天线 305 , 位于全电波吸收暗室 304中， 用于根据来自分路装置的 径信号发送空间信号；  a test antenna 305, located in the full electromagnetic wave absorption chamber 304, for transmitting a spatial signal based on a path signal from the branching device;
待测设备 306， 用于接收所述测试天线发送的空间信号；  The device under test 306 is configured to receive a spatial signal sent by the test antenna.
空间射频性能分析与显示模块 307，用于根据待测设备 306接收的空间 信号对所述待测设备的空间射频性能进行分析及显示。 The spatial RF performance analysis and display module 307 is configured to receive the space according to the device under test 306 The signal analyzes and displays the spatial RF performance of the device to be tested.
分路装置 303 , 还用于根据对径信号的到达角方向及角扩展范围的估 计， 确定来自信道模拟器的径信号与测试天线的映射关系， 具体为：  The branching device 303 is further configured to determine a mapping relationship between the path signal from the channel simulator and the test antenna according to the estimation of the angle of arrival and the range of the angular extension of the path signal, specifically:
对径信号进行到达角估计， 得到径信号的到达角方向和相应的角扩展 的范围；  Estimating the angle of arrival of the radial signal, obtaining the direction of arrival angle of the radial signal and the range of corresponding angular expansion;
根据所述径信号的到达角方向和相应的角扩展的范围， 确定所述径信 号的角语扩展范围；  Determining a range of the angular extent of the path signal according to an angle of arrival direction of the path signal and a range of corresponding angular spread;
确定所述径信号映射至所述径信号角谱扩展范围内的测试天线。  Determining that the path signal is mapped to a test antenna within an extended range of the angular range of the path signal.
测试天线 305的数目不小于信道模拟器 302输出径的数目。  The number of test antennas 305 is not less than the number of output paths of the channel simulator 302.
待测设备 306位于全电波吸收暗室 304的中心位置、 测试天线 305位 于以待测设备为中心的圓周上。  The device under test 306 is located at the center of the all-wave absorption darkroom 304, and the test antenna 305 is located on the circumference centered on the device under test.
空间射频性能分析与显示模块 307可以直接采用测试仪器 /仪表中相应 功能模块完成， 也可以作为一个单独的装置位于空间射频性能测试***中。  The space RF performance analysis and display module 307 can be directly implemented using the corresponding functional modules in the test instrument/instrument, or it can be used as a separate device in the space RF performance test system.
图 4为本发明一实施例基于多天线***的空间射频性能测试***结构 示意图， 在该实施例中， 测试天线的数目等于信道模拟器输出径的数目。  4 is a schematic structural diagram of a spatial RF performance test system based on a multi-antenna system according to an embodiment of the present invention. In this embodiment, the number of test antennas is equal to the number of output paths of the channel simulator.
可以看出， 本发明提供了一种基于信道射频模拟器 （信道模拟器） 与 全电波吸收暗室的空间射频性能测试方法及***， 对于如何建立测试环境， 实现对于 MIMO***（ MIMO终端）的 OTA测试、信道模拟器对于信号的 处理、 全电波吸收暗室中天线与信号的关系等问题进行了规定， 能够有效 地满足 MIMO OTA的需求。  It can be seen that the present invention provides a spatial RF performance test method and system based on a channel RF simulator (channel simulator) and a full-wave absorption darkroom, and how to establish a test environment to implement an OTA for a MIMO system (MIMO terminal) The test and channel simulators regulate the signal processing, the relationship between the antenna and the signal in the full-wave absorption darkroom, and can effectively meet the requirements of the MIMO OTA.
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。  The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

权利要求书 Claim
1、 一种基于多天线***的空间射频性能测试方法， 其特征在于， 该方 法包括：  A spatial RF performance testing method based on a multi-antenna system, characterized in that the method comprises:
信道模拟器根据基站信号模拟器输入的信号输出径信号至分路装置； 所述分路装置根据预先确定的映射关系将来自所述信道模拟器的径信 号映射到全电波吸收暗室中的测试天线；  The channel simulator outputs a path signal to the branching device according to the signal input by the base station signal simulator; the branching device maps the path signal from the channel simulator to the test antenna in the all-wave absorption darkroom according to a predetermined mapping relationship ;
所述测试天线根据来自所述分路装置的径信号发送空间信号； 待测设备接收所述空间信号， 之后由空间射频性能分析与显示模块根 据所述待测设备接收的空间信号对所述待测设备的空间射频性能进行分析 及显示。  The test antenna transmits a spatial signal according to a path signal from the branching device; the device under test receives the spatial signal, and then the spatial RF performance analysis and display module pairs the space signal according to the space signal received by the device under test The spatial RF performance of the test equipment is analyzed and displayed.
2、 根据权利要求 1所述的方法， 其特征在于， 所述确定来自信道模拟 器的径信号与测试天线的映射关系为： 根据对径信号的到达角方向及角扩 展范围的估计， 确定来自信道模拟器的径信号与测试天线的映射关系。  2. The method according to claim 1, wherein the determining a mapping relationship between the path signal from the channel simulator and the test antenna is: determining, based on an estimate of an angle of arrival direction and an angular extension range of the path signal, The mapping relationship between the path signal of the channel simulator and the test antenna.
3、 根据权利要求 2所述的方法， 其特征在于， 所述确定来自信道模拟 器的径信号与测试天线的映射关系具体为：  The method according to claim 2, wherein the determining the mapping relationship between the path signal from the channel simulator and the test antenna is specifically:
对径信号进行到达角估计， 得到径信号的到达角方向和相应的角扩展 的范围；  Estimating the angle of arrival of the radial signal, obtaining the direction of arrival angle of the radial signal and the range of corresponding angular expansion;
根据所述径信号的到达角方向和相应的角扩展的范围， 确定所述径信 号的角语扩展范围；  Determining a range of the angular extent of the path signal according to an angle of arrival direction of the path signal and a range of corresponding angular spread;
确定所述径信号映射至所述径信号角譜扩展范围内的测试天线。  Determining that the path signal is mapped to a test antenna within an extended range of the angular range of the path signal.
4、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 所述测试天 线的数目不小于信道模拟器输出径的数目。  The method according to any one of claims 1 to 3, characterized in that the number of test antennas is not less than the number of channel simulator output paths.
5、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 所述待测设 备位于全电波吸收暗室的中心位置、 所述测试天线位于以所述待测设备为 中心的圆周上。 The method according to any one of claims 1 to 3, wherein the device to be tested is located at a central position of the all-wave absorption darkroom, and the test antenna is located on a circumference centered on the device to be tested. .
6、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 所述空间射 频性能分析与显示模块通过测试仪器 /仪表中相应功能模块实现； 或者， 所 述空间射频性能分析与显示模块为一单独的装置。 The method according to any one of claims 1 to 3, wherein the spatial RF performance analysis and display module is implemented by a corresponding functional module in the test instrument/instrument; or the spatial RF performance analysis and display The module is a separate device.
7、 根据权利要求 3所述的方法， 其特征在于， 所述将径信号映射到测 试天线为： 根据所述径信号角谱扩展范围内的测试天线数对径信号的子径 信号进行合并， 再发送到测试天线， 所述合并后的子径信号数目与所述径 信号角语扩展范围内的测试天线数相对应。  The method according to claim 3, wherein the mapping the path signal to the test antenna is: combining the sub-path signals of the path signal according to the number of test antennas in the extended range of the angular signal spectrum, And sending to the test antenna, the number of the combined sub-path signals corresponding to the number of test antennas in the extended range of the path signal.
8、 一种基于多天线***的空间射频性能测试***， 其特征在于， 该系 统包括： 基站信号模拟器、 信道模拟器、 分路装置、 全电波吸收暗室、 测 试天线、 待测设备和空间射频性能分析与显示模块； 其中，  8. A spatial RF performance test system based on a multi-antenna system, the system comprising: a base station signal simulator, a channel simulator, a splitting device, an all-wave absorption darkroom, a test antenna, a device to be tested, and a space RF Performance analysis and display module;
所述基站信号模拟器， 用于模拟基站的发射信号并输出至信道模拟器； 所述信道模拟器， 用于根据基站信号模拟器输入的信号输出径信号至 分路装置；  The base station signal simulator is configured to simulate a transmission signal of the base station and output the signal to the channel simulator; the channel simulator is configured to output a path signal to the branching device according to the signal input by the base station signal simulator;
所述分路装置， 用于根据预先确定的映射关系将来自信道模拟器的径 信号映射到全电波吸收暗室中的测试天线；  The branching device is configured to map a path signal from the channel simulator to a test antenna in the all-wave absorption darkroom according to a predetermined mapping relationship;
所述测试天线， 位于全电波吸收暗室中， 用于根据来自分路装置的径 信号发送空间信号；  The test antenna is located in a full-wave absorption darkroom for transmitting a spatial signal according to a radial signal from the branching device;
所述待测设备， 用于接收所述测试天线发送的空间信号；  The device to be tested is configured to receive a spatial signal sent by the test antenna;
所述空间射频性能分析与显示模块， 用于根据所述待测设备接收的空 间信号对所述待测设备的空间射频性能进行分析及显示。  The spatial RF performance analysis and display module is configured to analyze and display spatial RF performance of the device under test according to the spatial signal received by the device under test.
9、 根据权利要求 8所述的***， 其特征在于， 所述分路装置， 还用于 根据对径信号的到达角方向及角扩展范围的估计， 确定来自信道模拟器的 径信号与测试天线的映射关系， 具体为：  The system according to claim 8, wherein the branching device is further configured to determine a path signal and a test antenna from the channel simulator according to an estimation of an angle of arrival direction and an angular extension range of the path signal. The mapping relationship is specifically as follows:
对径信号进行到达角估计， 得到径信号的到达角方向和相应的角扩展 的范围； 根据所述径信号的到达角方向和相应的角扩展的范围， 确定所述径信 号的角讲 展范围； Estimating the angle of arrival of the radial signal, obtaining the direction of arrival angle of the radial signal and the range of corresponding angular expansion; Determining an angular spread range of the radial signal according to an angle of arrival direction of the radial signal and a range of corresponding angular spread;
确定所述径信号映射至所述径信号角谱扩展范围内的测试天线。  Determining that the path signal is mapped to a test antenna within an extended range of the angular range of the path signal.
10、 根据权利要求 8或 9所述的***， 其特征在于， 所述测试天线的 数目不小于信道模拟器输出径的数目。  10. System according to claim 8 or 9, characterized in that the number of test antennas is not less than the number of channel simulator output paths.
11、 根据权利要求 8或 9所述的***， 其特征在于， 所述待测设备位 于全电波吸收暗室的中心位置、 所述测试天线位于以待测设备为中心的圓 周上。  The system according to claim 8 or 9, wherein the device to be tested is located at a central position of the all-wave absorption darkroom, and the test antenna is located on a circumference centered on the device to be tested.
12、 根据权利要求 8或 9所述的***， 其特征在于， 所述空间射频性 能分析与显示模块通过测试仪器 /仪表中相应功能模块实现； 或者， 所述空 间射频性能分析与显示模块为一单独的装置。  The system according to claim 8 or 9, wherein the spatial RF performance analysis and display module is implemented by a corresponding functional module in the test instrument/instrument; or the spatial RF performance analysis and display module is Separate device.
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