WO2013040907A1 - Procédé et dispositif de détection du taux d'ondes stationnaires - Google Patents

Procédé et dispositif de détection du taux d'ondes stationnaires Download PDF

Info

Publication number
WO2013040907A1
WO2013040907A1 PCT/CN2012/076302 CN2012076302W WO2013040907A1 WO 2013040907 A1 WO2013040907 A1 WO 2013040907A1 CN 2012076302 W CN2012076302 W CN 2012076302W WO 2013040907 A1 WO2013040907 A1 WO 2013040907A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
delay
component
reflection coefficient
incident
Prior art date
Application number
PCT/CN2012/076302
Other languages
English (en)
Chinese (zh)
Inventor
李凡龙
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013040907A1 publication Critical patent/WO2013040907A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages

Definitions

  • the present application relates to the field of communications, and in particular to a method and apparatus for detecting a standing wave ratio. Background technique
  • the standing wave ratio is called the voltage standing wave ratio (VSWR or SWR).
  • VSWR voltage standing wave ratio
  • SWR voltage standing wave ratio
  • the phase of the incident wave and the reflected wave are the same, the voltage amplitude is added to the maximum voltage amplitude to form the antinode; the incident wave and the reflected wave.
  • the voltage amplitude is reduced to the minimum voltage amplitude to form a node, and the amplitude values of other points are between the antinode and the node.
  • This composite wave becomes a standing wave.
  • the standing wave ratio is the ratio of the magnitude of the voltage at the antinode of the standing wave to the amplitude of the voltage at the node.
  • the impedance of the antenna does not match the impedance of the feeder or the impedance of the antenna does not match with the impedance of the transmitter.
  • the high-frequency energy will be reflected and folded back, and the standing wave will be merged with the forward part of the interference.
  • the concept of "standing wave ratio" has been established, and the standing wave ratio can be obtained by the formula (1).
  • standing wave ratio it is necessary to know the amplitude of the reflection coefficient to know the standing wave ratio.
  • the conventional method of obtaining the reflection coefficient generally expresses the amplitude in the form of power. This in turn derives the use of return loss to obtain the standing wave ratio. That is, using the conversion relationship between amplitude and power, re-launch
  • the expression of the standing wave ratio is briefly described as follows:
  • Return loss (RL, Return Loss) is defined as:
  • This method which is generally called scalar detection, is also widely used in the communication system.
  • the acquisition points of the incident signal and the reflected signal must all come from the point where the matching condition expressed by the standing wave ratio is desired. That is, it is necessary to use the standing wave ratio to indicate the matching of the A point, and the detection point cannot be placed at the point B different from the A point. That is, to measure the standing wave ratio of point A, it must be placed at point A, but not at point B, otherwise the test results will be inaccurate.
  • the detection path through which the incident and reflected signal power is detected must have exactly the same gain characteristics. This gain characteristic is generally measured in terms of amplitude and phase. That is, the detection paths through which the incident and the reflection pass must have exactly the same gain, and in the conventional test method, it is difficult to ensure that the detection paths of the two have exactly the same gain.
  • the block diagram for detecting the standing wave ratio in the radio remote unit (RRU) used in wireless communication is generally as shown in FIG. 1.
  • TX is a transmitting signal
  • FWD Forward
  • REV Reverse
  • the reflected signal, at this point, the point at which it is desired to detect the standing wave ratio reaction is the RRU device and the antenna system ANT.
  • PA component power amplifier
  • the power detection point of the reflected signal is placed before the component filter (Filter), so that the first point described above cannot be satisfied.
  • the inventor found in the invention process that the conventional standing wave ratio scalar detection method has at least the following problems: First, the traditional standing wave ratio scalar detection method has a large limitation, and it is difficult to obtain accurate in practice. High-precision standing wave ratio detection value; Secondly, the traditional standing wave ratio scalar detection method uses the method of calculating the return loss to reflect whether the entire radio wave transmitting station and the antenna match, and cannot test the signal transmission process. There is a problem with which part is matched, and which part is poorly matched, that is, segmentation detection is not possible. Summary of the invention
  • Embodiments of the present application provide a method and apparatus for detecting a standing wave ratio to accurately calculate a standing wave ratio, thereby accurately measuring a signal matching between components in a signal transmission path.
  • An embodiment of the present invention provides a method for determining a corresponding component of a reflected signal, where the method includes:
  • the determining the first delay between the first transmit signal and the first incident signal corresponding to the first transmit signal includes:
  • the determining, by the determining, the first delay between the first transmit signal and the first incident signal corresponding to the first transmit signal includes:
  • the determining a second delay between the first transmit signal and the first reflected signal corresponding to the first transmit signal includes:
  • the determining that the first transmit signal corresponds to the first transmit signal includes:
  • the obtaining, by the second delay and the first delay, obtaining a third delay between the first incident signal and the first reflected signal is: calculating the second delay and The difference between the first delays obtains the third delay.
  • the determining, according to the third delay and the component delay of each component of the N components, the component corresponding to the reflected signal is: the third delay and each of the N components
  • the components of the components are delayed in comparison, and the components corresponding to the same component delay as the third delay are determined as the components corresponding to the reflected signals.
  • An embodiment of the present invention further provides a method for detecting a standing wave ratio, the method comprising:: based on a first delay between an incident signal corresponding to a transmit signal and the transmit signal, and the transmit signal corresponding to the transmit signal a second delay between the reflected signals to obtain a third delay between the incident signal and the reflected signal;
  • a standing wave ratio of the Nth component is obtained based on the reflection coefficient.
  • the first delay between the incident signal corresponding to the transmit signal and the transmit signal, and the second delay between the transmit signal and the reflected signal, to obtain the incident signal and the reflected signal The third delay, including:
  • a third delay between the incident signal and the reflected signal is obtained based on the second delay and the first delay.
  • the determining the first delay between the transmit signal and the incident signal corresponding to the transmit signal includes:
  • a first delay between the transmit signal and the incident signal is obtained when there is a correlation peak between the transmit signal and the incident signal.
  • the determining a second delay between the transmit signal and the reflected signal includes:
  • the component corresponding to the reflected signal is determined to be the Nth component from the plurality of components based on the third delay and a component delay of each component of the plurality of components:
  • the third delay is compared with the component delay of each of the plurality of components, and the Nth component corresponding to the same component delay as the third delay is determined to be the component corresponding to the reflected signal.
  • the obtaining a reflection coefficient corresponding to the Nth component is: acquiring a reflection coefficient corresponding to the Nth component based on at least one complex having phase and amplitude characteristics.
  • the obtaining the reflection coefficient corresponding to the Nth component based on the at least one complex having the phase and the radiance characteristic includes:
  • first reflection coefficient m I corresponding to an open circuit
  • the first reflection coefficient m I corresponds to The value of 1 is 0, and the phase is 0.
  • the second reflection coefficient 1 1 " ⁇ 1 corresponds to -1, phase 180;
  • the third reflection coefficient mi, the third reflection coefficient mi corresponds to a value of 0, and the phase is 0;
  • An embodiment of the present invention further provides an apparatus for determining a corresponding component of a reflected signal, the apparatus comprising:
  • a first delay determining unit configured to determine a first delay between the first transmit signal and the first incident signal corresponding to the first transmit signal
  • a second delay determining unit configured to determine a second delay between the first transmit signal and the first reflected signal corresponding to the first transmit signal
  • a third delay determining unit configured to obtain a third delay between the first incident signal and the first reflected signal based on the second delay and the first delay
  • a component delay determining unit configured to determine, according to the third delay and a component delay of each component of the N components, the component corresponding to the reflected signal, the component being one of the N components, wherein, N Is an integer greater than or equal to 1.
  • An embodiment of the present invention further provides an apparatus for detecting a standing wave ratio, the apparatus comprising: a third delay determining unit, configured to perform a first delay between incident signals corresponding to the transmitted signal based on a transmit signal, and a second delay between the transmitted signal and the reflected signal corresponding to the transmitted signal, obtaining a third delay between the incident signal and the reflected signal; a reflection coefficient determining unit, configured to determine, according to the third delay and a component delay of each component of the plurality of components, a component corresponding to the reflected signal from the plurality of components as an Nth component, and acquire a reflection coefficient corresponding to the Nth component, wherein the N is an integer greater than 1; a standing wave ratio unit configured to obtain a standing wave of the Nth component based on a reflection coefficient corresponding to the Nth component ratio.
  • the reflection coefficient determining unit includes: a constant obtaining unit, configured to acquire a first reflection coefficient 11 “ ⁇ 1 corresponding to an open circuit, where the first reflection coefficient corresponds to a value of 1 and the phase is 0; obtaining a second reflection coefficient 1 ⁇ 1 corresponding to a short circuit, wherein the second reflection coefficient 11 " ⁇ 1 corresponds to a value of -1, phase 180; and obtains a third reflection coefficient mi corresponding to the exact match, The third reflection coefficient mi corresponds to a value of 0, and the phase is 0.
  • the voltage acquisition unit Based on the first reflection coefficient, the second reflection coefficient, and the third reflection coefficient, three constants ⁇ , ⁇ , and C are obtained; the voltage acquisition unit, a reflection signal VREV for obtaining an incident signal voltage V FWD corresponding to the incident signal and a reflected signal of the Nth component;
  • the segmentation detection of the standing wave ratio is realized by determining the delay between the incident signal and the reflected signal of each component in the signal transmission process;
  • FIG. 1 is a block diagram of a standing wave ratio detection used in an RRU in the prior art
  • FIG. 2 is a flowchart of a method for determining a component corresponding to a reflected signal according to Embodiment 1 of the present application
  • FIG. 3 is a flowchart of a method for detecting a standing wave ratio according to Embodiment 2 of the present application
  • FIG. 4 is a schematic structural diagram of an apparatus for determining a component corresponding to a reflected signal in Embodiment 3 of the present application;
  • Embodiment 5 is a device diagram of detecting a standing wave ratio in Embodiment 4 of the present application.
  • FIG. 6 is a schematic structural diagram of a reflection coefficient determining unit in Embodiment 4 of the present application
  • FIG. 7 is a diagram showing a dual port standing wave ratio vector model in Embodiment 4 of the present application. detailed description
  • the embodiment of the present application provides a method and a device for detecting the standing wave ratio, which can not only accurately calculate The wave ratio is settled, and the delay between the incident signal and the reflected signal of each component in the signal transmission process can be determined, that is, the signal matching of each component in the signal transmission path is accurately detected by using the standing wave ratio segmentation detection method.
  • the first embodiment of the present application provides a method for determining a corresponding component of a reflected signal, including:
  • Step 10 Determine a first delay between the first incident signal and the first incident signal corresponding to the first transmit signal
  • Step 20 Determine a second delay between the first reflected signal and the first reflected signal corresponding to the first transmit signal
  • Step 30 Obtain the first incident signal and the first delay based on the second delay and the first delay. A third delay between reflected signals.
  • Step 40 Determine, according to the third delay and a component delay of each component of the N components, a component corresponding to the reflected signal, where the component is one of N components, where N is an integer greater than or equal to 1.
  • the determining, by the step 10, the first delay between the first transmit signal and the first transmit signal corresponding to the first transmit signal may include:
  • the length of the incident signal is increased to obtain a second incident signal corresponding to the first transmit signal, where T1 is greater than TO;
  • a delay between the first transmission signal and the second incident signal is obtained as the first delay. If there is a correlation peak between the first transmitted signal and the second incident signal corresponding to the first transmitted signal at time T1, the delay between the first transmitted signal and the second incident signal at this time is taken as the first delay.
  • the determining, by the step 20, the second delay between the first reflected signal and the first reflected signal corresponding to the first transmit signal specifically includes:
  • a second delay between the first transmitted signal and the first reflected signal is obtained when there is a correlation peak between the first transmitted signal and the first reflected signal.
  • the third delay between the first incident signal and the first reflected signal is obtained based on the second delay and the first delay, specifically: calculating a difference between the second delay and the first delay, obtaining the first Three delays.
  • step 40 determining the component corresponding to the reflected signal according to the third delay and the component delay of each component of the N components, specifically: comparing the third delay with the component delay of each component of the N components, The components corresponding to the third component delay of the same delay are determined as the components corresponding to the reflected signals.
  • the second embodiment of the present application provides a method for detecting the standing wave ratio, including:
  • Step 50 Obtain a third delay between the incident signal and the reflected signal based on a first delay between the received signal corresponding to the transmitted signal and a second delay between the transmitted signal and the reflected signal corresponding to the transmitted signal;
  • Step 60 Determine, according to the third delay and the component delay of each component of the plurality of components, the component corresponding to the reflected signal from the plurality of components as the Nth component, and acquire a reflection coefficient corresponding to the Nth component, Wherein N is an integer greater than 1;
  • Step 70 Obtain a standing wave ratio of the Nth component based on a reflection coefficient corresponding to the Nth component.
  • the step 50 based on the transmitted signal and the transmitted signal pair
  • the first delay between the incident signals and the second delay between the transmitted signals and the reflected signals corresponding to the transmitted signals, and obtaining a third delay between the incident signals and the reflected signals specifically including:
  • a third delay between the incident signal and the reflected signal corresponding to the transmitted signal is obtained based on the second delay and the first delay.
  • the first delay between the incident signal corresponding to the transmit signal and the transmit signal is determined, and specifically includes:
  • a first delay between the transmitted signal and the incident signal is obtained when there is a correlation peak between the transmitted signal and the incident signal corresponding to the transmitted signal.
  • the incident signal corresponding to the transmitted signal does not have a correlation peak, increasing the length of the incident signal until the collected signal of the collected signal has a correlation peak corresponding to the incident signal;
  • determining a second delay between the transmitted signal and the reflected signal comprises:
  • the reflected signal corresponding to the transmitted signal generated by the signal source is collected; when the transmitted signal and the reflected signal corresponding to the transmitted signal have a correlation peak, a second delay between the transmitted signal and the reflected signal corresponding to the transmitted signal is obtained. Similarly, when there is no correlation peak between the transmitted signal and the reflected signal, the length of the transmitted signal is increased until the transmitted signal of the cluster and the reflected signal have a correlation peak.
  • the component corresponding to the reflected signal is determined from the plurality of components as the Nth component, specifically: the third delay and each of the plurality of components
  • the component delays of the components are compared, and the Nth component corresponding to the same component delay as the third delay is determined to be the component corresponding to the reflected signal.
  • step 60 obtaining the corresponding part of the Nth component
  • the reflection coefficient is specifically as follows:
  • first reflection coefficient m I corresponding to the open circuit, wherein the first reflection coefficient m I corresponds to a value of 1 and the phase is 0; and when the short circuit is obtained, a corresponding second reflection coefficient
  • reflection coefficient and second reflection coefficient of the third are obtained three A, B and C; ⁇
  • the third embodiment of the present application provides an apparatus for determining a component corresponding to a reflected signal, which specifically includes:
  • a first delay determining unit 301 configured to determine a first delay between the first transmit signal and the first incident signal corresponding to the first transmit signal
  • the second delay determining unit 302 is configured to determine a second delay between the first transmit signal and the first reflected signal corresponding to the first transmit signal, where
  • a third delay determining unit 303 configured to obtain a third delay between the first incident signal and the first reflected signal based on the second delay and the first delay;
  • a component delay determining unit 304 configured to determine, according to the third delay and a component delay of each component of the N components, a component corresponding to the reflected signal, the component being one of the N components, Where N is an integer greater than or equal to 1.
  • the fourth embodiment of the present application provides a device for detecting a standing wave ratio in a segment, comprising: a third delay determining unit 401, configured to: based on a first delay between an incident signal corresponding to a transmit signal and a transmit signal, And a second delay between the transmitted signal and the reflected signal to obtain a third delay between the incident signal and the reflected signal;
  • a reflection coefficient determining unit 402 configured to determine, according to the third delay and a component delay of each component of the plurality of components, a component corresponding to the reflected signal from the plurality of components as an Nth component, and acquire a reflection coefficient corresponding to the Nth component, wherein the N is an integer greater than 1;
  • the standing wave ratio unit 403 is configured to obtain a standing wave ratio of the Nth component based on a reflection coefficient corresponding to the Nth component.
  • the reflection coefficient determining unit specifically includes:
  • the constant obtaining unit 402 A is configured to acquire a first reflection coefficient corresponding to the open circuit.
  • the first reflection coefficient corresponds to a value of 1 and the phase is 0.
  • ⁇ ⁇ is obtained.
  • the second reflection coefficient 1 1 " ⁇ 1 corresponds to a value of -1, and the phase is 180; and the third reflection coefficient II corresponding to the complete matching is obtained.
  • the third reflection coefficient II corresponds to a value of 0, and the phase is 0; obtaining three constants ⁇ , ⁇ , and C based on the first reflection coefficient, the second reflection coefficient, and the third reflection coefficient;
  • the embodiment of the present application abstracts various actual standing wave ratio detecting devices into a vector model, and pushes
  • the specific process is as follows: As shown in Fig. 7, it is a two-port standing wave ratio vector model diagram, no matter how many components pass through the incident signal and the reflected signal. Transmission and each component is a dual port, which can always be represented by an S-parameter model.
  • the incident signal is a voltage signal corresponding to the incident ⁇ ⁇ WD reflected signal with the reflected signal ratio of the N-th ⁇ VREV the member;
  • the values of the three constants can be obtained by using the three cases in which the reflection coefficient is known, without loss of generality.
  • three equations are obtained by using three methods: open circuit, short circuit and matching.
  • corresponding to the open circuit the first reflection coefficient
  • the corresponding value is -1, phase 180;
  • ⁇ I obtaining three constants ⁇ , ⁇ and C;

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

L'invention concerne un procédé de détermination d'un élément correspondant à un signal réfléchi et un procédé de détection d'un taux d'ondes stationnaires. Le procédé de détection de taux d'ondes stationnaires comprend les étapes suivantes : en fonction d'un premier retard entre un signal émis et un signal incident correspondant au signal émis et d'un deuxième retard entre le signal émis et un signal réfléchi correspondant au signal émis, obtenir un troisième retard entre le signal incident et le signal réfléchi ; en fonction du troisième retard et d'un retard d'élément pour chaque élément dans une pluralité d'éléments, déterminer qu'un élément correspondant au signal réfléchi est le nième élément dans la pluralité d'éléments et obtenir un coefficient de réflexion correspondant au nième élément, n étant un entier supérieur à 1 ; et en fonction du coefficient de réflexion, obtenir un taux d'ondes stationnaires du nième élément. L'invention concerne en outre, de manière correspondante, un dispositif de détermination d'un élément correspondant à un signal réfléchi et un dispositif de détection de taux d'ondes stationnaires, dans le but de réaliser la détection segmentée du taux d'ondes stationnaires, de garantir l'exactitude du taux d'ondes stationnaires obtenu et également d'obtenir l'état du signal gui correspond parmi les éléments.
PCT/CN2012/076302 2011-09-21 2012-05-30 Procédé et dispositif de détection du taux d'ondes stationnaires WO2013040907A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110281929.2A CN102510311B (zh) 2011-09-21 2011-09-21 一种检测驻波比的方法和装置
CN201110281929.2 2011-09-21

Publications (1)

Publication Number Publication Date
WO2013040907A1 true WO2013040907A1 (fr) 2013-03-28

Family

ID=46222365

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/076302 WO2013040907A1 (fr) 2011-09-21 2012-05-30 Procédé et dispositif de détection du taux d'ondes stationnaires

Country Status (2)

Country Link
CN (1) CN102510311B (fr)
WO (1) WO2013040907A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1380730A (zh) * 2001-04-06 2002-11-20 Eni技术公司 反射系数相位检测器
US20050096860A1 (en) * 2003-10-31 2005-05-05 Hillstrom Timothy L. Using vector network analyzer for aligning of time domain data
CN101958756A (zh) * 2010-02-11 2011-01-26 华为技术有限公司 驻波检测方法、驻波检测装置及基站
CN102128986A (zh) * 2010-12-30 2011-07-20 芯通科技（成都）有限公司 检测射频前端产品驻波比的方法及装置
CN102185669A (zh) * 2011-05-05 2011-09-14 中兴通讯股份有限公司 天馈系统状态的确定方法及装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101146314B (zh) * 2007-10-22 2012-09-05 中兴通讯股份有限公司 一种时分双工通信系统的驻波比检测装置及方法
US7822579B2 (en) * 2008-01-21 2010-10-26 Agilent Technologies, Inc. Interference rejection through circle fitting
CN101814963A (zh) * 2010-02-25 2010-08-25 飞创(苏州)电讯产品有限公司 自动微波电子可调负载装置及其检测方法
CN102291192B (zh) * 2011-09-13 2016-09-14 南京中兴软件有限责任公司 驻波比获取方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1380730A (zh) * 2001-04-06 2002-11-20 Eni技术公司 反射系数相位检测器
US20050096860A1 (en) * 2003-10-31 2005-05-05 Hillstrom Timothy L. Using vector network analyzer for aligning of time domain data
CN101958756A (zh) * 2010-02-11 2011-01-26 华为技术有限公司 驻波检测方法、驻波检测装置及基站
CN102128986A (zh) * 2010-12-30 2011-07-20 芯通科技（成都）有限公司 检测射频前端产品驻波比的方法及装置
CN102185669A (zh) * 2011-05-05 2011-09-14 中兴通讯股份有限公司 天馈系统状态的确定方法及装置

Also Published As

Publication number Publication date
CN102510311A (zh) 2012-06-20
CN102510311B (zh) 2016-01-20

Similar Documents

Publication Publication Date Title
CN110168396B (zh) 到达时间（toa）测量
US10270543B2 (en) Signal generating apparatus and signal generating method
WO2011098020A1 (fr) Procédé d'essai d'ondes stationnaires, appareil d'essai d'ondes stationnaires et station de base
WO2013037217A1 (fr) Procédé et appareil d'acquisition d'un rapport d'onde stationnaire
US9768895B2 (en) Multipath time delay estimation apparatus and method and receiver
US20170343661A1 (en) Pulse radar, method of correcting transmission pulse in pulse radar, and method of correcting reception pulse in pulse radar
US20190170847A1 (en) Receiver-system
CN109031261B (zh) 一种时差估计方法及装置
WO2012151939A1 (fr) Procédé de détection de rapport d'onde stationnaire, dispositif et station de base
RU2521084C1 (ru) Разностно-дальномерный способ определения координат источника радиоизлучения
US10241188B2 (en) Method and apparatus for obtaining time of arrival TOA when mobile terminal is located
US10887008B2 (en) Apparatus and method for compensating optical transmission delay
US20210373112A1 (en) Compensating for crosstalk in determination of an angle of arrival of an electromagnetic wave at a receive antenna
JP2016142659A (ja) 故障点標定方法及び故障点標定システム
WO2013040907A1 (fr) Procédé et dispositif de détection du taux d'ondes stationnaires
WO2023150770A1 (fr) Détection de condition de charge
JPH05341039A (ja) 信号処理装置
JP5583854B2 (ja) 無線通信装置の電力を較正する方法、および電力較正のために無線通信装置により実行される方法
CN210243826U (zh) 一种雷达多通道信号预处理装置及其脉冲压缩单元
KR101905434B1 (ko) 수동상호변조왜곡 신호 측정 장치 및 방법
WO2023137604A1 (fr) Estimation de retard temporel d'intermodulation passive
JP2016195391A (ja) 非線形特性推定装置及び非線形特性推定方法
CN113132027B (zh) 无线电发射器的工作频率校正方法及其装置
WO2015186429A1 (fr) Appareil de mesurage de propriétés de câble de transfert, et procédé de mesurage de propriétés de câble de transfert
JP6850739B2 (ja) 無線端末局の位置推定方法および無線基地局

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12832938

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12832938

Country of ref document: EP

Kind code of ref document: A1