WO2010058818A1 - Appareil et procédé de simulation de la propagation d'ondes radio - Google Patents

Appareil et procédé de simulation de la propagation d'ondes radio Download PDF

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Publication number
WO2010058818A1
WO2010058818A1 PCT/JP2009/069639 JP2009069639W WO2010058818A1 WO 2010058818 A1 WO2010058818 A1 WO 2010058818A1 JP 2009069639 W JP2009069639 W JP 2009069639W WO 2010058818 A1 WO2010058818 A1 WO 2010058818A1
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WIPO (PCT)
Prior art keywords
antenna
signal
radio wave
vehicle
wireless communication
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PCT/JP2009/069639
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English (en)
Japanese (ja)
Inventor
秀一 尾林
裕樹 庄木
崇文 大石
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株式会社 東芝
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Publication of WO2010058818A1 publication Critical patent/WO2010058818A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks

Definitions

  • the present invention relates to a test technique for a wireless communication device, and more particularly, to a radio wave propagation simulation apparatus and method for simulating an in-vehicle field test such as a wireless communication apparatus indoors or at an open site.
  • Non-Patent Document 1 A fading simulator that generates fading at a position where a slave unit is fixed has been proposed (see Non-Patent Document 1, for example). More specifically, the transmission signal from the base station is distributed, each signal has a different strength, and a phase shift variation corresponding to the fading speed is added, and the signal is radiated from a different antenna into the measurement box. By reflecting and scattering radio waves, fading occurs at a position where the slave unit is fixed.
  • a radio wave absorber is attached only to the wall surface in the direction from the wave source to the portable terminal so that the multiple reflected waves are attenuated after an appropriate number of reflections in a narrow measurement box.
  • the receiving antenna is necessary for receiving the information signal retransmitted from the mobile terminal, and the transmission characteristics under fading of the mobile terminal cannot be measured.
  • the present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a radio wave propagation simulation apparatus and method capable of reproducing a reception situation caused by the arrival direction of radio waves to a terminal in a vehicle.
  • a radio wave propagation simulation apparatus transmits an antenna simulating an incoming wave source of a radio wave arriving at a wireless communication device arranged in a vehicle at a field test site and transmitted from the antenna.
  • Level adjustment means for adjusting the signal level of the first signal wherein the level adjustment means adjusts the signal level of the first signal to match the signal level of the radio wave.
  • the radio wave propagation simulation apparatus includes an antenna that simulates an incoming wave source of radio waves that are transmitted and received by a wireless communication device that is arranged in a vehicle in a field test field, and a signal level of a first signal transmitted from the antenna.
  • level adjusting means for adjusting the signal level of the second signal received by the antenna, wherein the level adjusting means sets the signal level of the first signal and the signal level of the second signal to the radio wave. It adjusts so that it may match with the signal level of this.
  • the radio wave propagation simulation apparatus of the present invention is an antenna for simulating an incoming wave source of radio waves transmitted and received by the wireless communication device arranged in a vehicle in a field test field, and for checking an incoming call of the wireless communication device.
  • a base station simulator that transmits a transmission signal via the antenna and receives a reception signal for inspecting a call of the wireless communication apparatus via the antenna, and a signal level of the first signal transmitted from the antenna
  • level adjusting means for adjusting the signal level of the second signal received by the antenna, wherein the level adjusting means converts the signal level of the first signal to the signal level of the radio wave from the incoming wave source.
  • the signal level of the second signal is matched with the signal level of the radio wave reaching the incoming wave source.
  • the wireless communication device is configured to measure each arrival direction and each level of the multiplexed wave component to the wireless communication device at the site where the in-vehicle field test is performed, and to be disposed at an evaluation place different from the site.
  • Antennas are installed at one or more positions that represent the directions of arrival of the multiple wave components, and when the transmission signal from each antenna is transmitted, the multiple wave components at the position of the wireless communication device are transmitted.
  • Each arrival direction and each level is measured, and the difference between each arrival direction and each level of the multiwave component measured at the site where the in-vehicle field test is performed and each arrival direction and each level of the multiwave component measured at the evaluation location is To transmit a transmission signal for inspecting an incoming call of the wireless communication device or to inspect an outgoing call of the wireless communication device when smaller than a threshold value
  • the antenna connected to the base station simulator for receiving a received signal, characterized in that to examine the transmission and reception performance of the wireless communication device.
  • the radio wave propagation simulation apparatus and method of the present invention it is possible to reproduce the reception situation resulting from the arrival direction of the radio wave to the terminal in the vehicle.
  • FIG. 1 is a diagram illustrating an example of a situation of arrival of multiple waves and propagation of intrusion into a vehicle.
  • the first arrival wave 103 and the second arrival wave 104 out of multiple waves are strong and arrive at the position of the measurement vehicle 161 that measures the wireless communication device from the arrival directions 101 and 102, respectively. Indicates. Further, the radio wave is reflected, diffracted, scattered, and the like by the structure of the measurement vehicle 161 and arrives at the wireless communication device in the vehicle. Although there are a large number of multiplexed waves arriving at the wireless communication device, a component having a high level (for example, the signal strength of the received signal received by the wireless communication device) has a great influence on the transmission / reception characteristics. Therefore, the arrival direction of each component of the high-level multiplexed wave is identified, and as shown in FIG. 2, the position corresponding to the arrival direction (from 1 in the figure) to the wireless communication device placed in the anechoic chamber. An antenna that simulates the radio wave source is placed in 6).
  • the radio wave propagation simulation apparatus of the present embodiment is provided with a transmission / reception antenna that simulates an incoming wave source at a position corresponding to the arrival direction of the radio wave to the wireless communication apparatus in the vehicle, and the signal level of the transmission / reception signal at the antenna is set to this arrival level.
  • intensity adjusting means such as an attenuator is used.
  • the radio wave propagation simulation apparatus of the first example of the embodiment will be described with reference to FIG.
  • the radio wave propagation simulation apparatus of the first example includes a base station simulator 201, a distribution synthesizer 202, one or more variable phase shifters 203, one or more variable attenuators 204, and one or more antennas 205.
  • the base station simulator 201 simulates the transmission / reception function of the base station.
  • the base station simulator 201 has a function that can check outgoing and incoming calls.
  • the distribution synthesizer 202 distributes signals from the base station simulator 201 and synthesizes signals from a plurality of variable phase shifters 203.
  • the variable phase shifter 203 changes the relative phases of a plurality of signals.
  • the variable attenuator 204 adjusts to weaken the signal level. That is, the variable attenuator 204 receives the signal level of a plurality of signals, the signal level when the wireless communication device receives the signal (first signal) transmitted from the antenna 205, and the wireless communication device has arrived from the incoming wave source. Adjust to the signal level when receiving radio waves.
  • the phase shift and amplitude difference between the direct wave and the diffracted wave generated from the plane wave for each incoming wave. can be simulated. Therefore, the radio wave coming from the incoming wave source can be simulated by the signal (first signal) transmitted from the antenna 205.
  • the antenna 205 simulates a radio wave source and is generally arranged in a plurality.
  • the antenna 205 transmits a signal (first signal) for checking whether or not the wireless communication apparatus at the terminal position 271 receives an incoming call, and the base station receives a call from the wireless communication apparatus at the terminal position 271. This is for receiving a signal (second signal) for checking whether or not it is possible. That is, the plurality of antennas 205 perform signal transmission / reception with the wireless communication device to be tested.
  • a part of the measurement vehicle 161 is illustrated at the same time as the antenna 205 only for convenience in order to indicate where the antenna 205 is arranged on the measurement vehicle 161.
  • the field test is not performed by attaching the antenna 205 to the measurement vehicle 161. That is, when performing a field test, it is not necessary to install the measurement vehicle 161, and it is only necessary to install the antenna 205.
  • variable attenuator 204 is changed to two circulators 1401 and 1402 and two variable gain amplifiers 1403 and 1404 as shown in FIG.
  • the signal from the variable phase shifter 203 is output to the antenna 205 through the variable gain amplifier 1403 via the circulator 1401, and the signal from the antenna passes through the variable gain amplifier 1404 via the circulator 1402 to the circulator 1401.
  • the variable phase shifter 203 To the variable phase shifter 203.
  • the antenna 205 and the terminal position 271 are preferably disposed in the radio wave anechoic chamber 251.
  • the antenna 205 and the terminal position 271 are more susceptible to reflection, scattering, and diffraction than signals from an antenna that simulates a radio wave source.
  • the signal may be placed in an open site or an indoor / outdoor environment corresponding thereto.
  • the radio wave anechoic chamber 251 is a room in which, for example, a radio wave absorber 252 is provided on the inner wall and an electromagnetic wave shield is provided on the outer wall.
  • the radio wave propagation simulation apparatus of the first example described above it is possible to reproduce the transmission / reception situation resulting from the arrival direction of the radio wave to the wireless communication apparatus in the vehicle.
  • the downlink signal has been described.
  • the signal levels of a plurality of signals (second signals) are matched with the signal level of the radio wave reaching the incoming wave source.
  • the variable phase shifter 203 and the variable phase shifter 203 are variable so that the downlink signal (first signal) transmitted from the antenna 205 and the signal level of the uplink signal (second signal) received by the antenna 205 have the same value. Adjust the attenuator 204.
  • radio wave propagation simulation apparatus uses a horn antenna 301 and a dipole antenna 302 instead of the antenna 205.
  • the horn antenna 301 is for approximating a transmitted wave that passes through the glass and arrives in the vehicle with a plane wave.
  • the horn antenna 301 approximates radio waves coming from the directions of the antenna 2 and the antenna 6. Since the horn antenna 301 emits radio waves having substantially the same phase from the area of the front surface of the horn, it can easily simulate a plane wave.
  • an array antenna including a signal distributor / combiner 401 and a plurality of antennas 402 is used, and is in phase with the direction of the wireless communication device at the terminal position 271. It can be considered that the radio wave is radiated.
  • the array may be a two-dimensional or higher array in addition to a one-dimensional array.
  • the dipole antenna 302 is arranged at the apex (stop point) of the Keller cone, for example, in order to approximate the diffraction from the edge of the vehicle with a point wave source.
  • the edge is a boundary between a car glass (for example, window glass) and a portion made of another material.
  • the diffraction phenomenon due to the edge of an object is that when the size of the edge 501 is sufficiently large, the edge 501 is set as the center line Z, and two sets of cones (the transmission point 502 and the reception point 503 are on the side of the same cone) Can be expressed as a local phenomenon with the vertex O of the wave source as a wave source (see, for example, the supervising method of the electromagnetic wave problem, supervised by Eiyoshi Yamashita, IEICE (1987)).
  • One vertex of the Keller cone is always found on the edge 501.
  • requires the vertex of this Keller cone from the arrival direction of a multiwave, the position of the indoor radio
  • the antenna 302 is placed.
  • the direction of arrival at the wireless communication device can be simulated if an antenna is placed at a position approximately on the line connecting the position where the wireless communication device is placed and the top of the Keller cone.
  • the variable phase shifter 203 that adjusts the phase according to the distance and the variable attenuator 204 that adjusts the signal level, it is not always necessary to place it at the top of the Keller cone.
  • the arrival of the radio wave at the position of the wireless communication apparatus is achieved by using an appropriate antenna to simulate the diffracted wave due to the edge or the incoming wave that passes through the glass. The situation can be simulated correctly.
  • a radio wave propagation simulation apparatus according to a third example of the embodiment will be described with reference to FIG.
  • the number of sets of the variable phase shifter 203 and the variable attenuator 204 is twice as many as that in FIG.
  • a delay time adjustment unit and a distribution synthesizer are installed between the phase shifter 203.
  • the first delay time adjustment unit 601 and the second delay time adjustment unit 601 are connected to the distribution synthesizer 202, the first distribution synthesizer 602 is connected to the first delay time adjustment unit 601, and the second delay time.
  • a second distribution synthesizer 602 is connected to the adjustment unit 601, and the number of variable phase shifters 203 of the number in FIG. 2 is connected to each of the first distribution synthesizer 602 and the second distribution synthesizer 602.
  • a distribution synthesizer 603 is connected between the plurality of variable attenuators 204 and the antenna 205.
  • the antenna disposed at a position corresponding to the edge of the vehicle body is connected to the distribution synthesizer 603.
  • the distribution synthesizer 603 is connected to the variable attenuator 204 connected to the first delay time adjustment unit 601 and the variable attenuator 204 connected to the second delay time adjustment unit 601.
  • the first delay time adjustment unit 601 and the second delay time adjustment unit 601 include delay elements and digital filters, and simulate arrival delay time differences between a plurality of incoming waves.
  • the antenna 2 and the antenna 6 simulate the transmitted wave of glass, but components arriving from the left or the right are dominant, and in this case, only a single delay time adjusting device is used. To the antenna. In addition, since both edge diffracted waves contain both left and right arriving wave components, a plurality of phase differences and amplitudes are adjusted by input / output from both delay time adjusting devices. A signal system bundled by a distribution synthesizer is connected to an antenna.
  • the propagation time, passing phase and signal of each incoming wave can be set. It is conceivable to use a measurement value obtained by a device capable of measuring the level (sometimes called a channel sounder). Further, as shown in FIG. 7, after measuring the arrival directions 701 and 702 of the multiwave near the point where the measurement vehicle 703 is placed, the structure of the measurement vehicle and the arrival of the multiwave are obtained using a method such as the ray tracing method. It is also conceivable to estimate the propagation time, passage phase and signal level using the direction or position of the measurer in the vehicle as input conditions and set the estimated value to the phase difference and amplitude of each incoming wave.
  • the radio wave propagation simulation apparatus of the fourth example is one in which a Doppler modulator 801 is installed corresponding to each antenna 205 of the radio wave propagation simulation apparatus of FIG.
  • the Doppler modulator 801 is installed for each antenna, and in the example of FIG. 8, six of fd1 to fd6 are installed.
  • the Doppler modulator 801 uses a Doppler modulator and applies Doppler fading corresponding to the arrival direction to the signal in order to simulate an environment during movement on a straight line in a short section.
  • the control unit 802 controls how much Doppler fading is applied to each Doppler modulator 801 according to the vehicle speed to be simulated.
  • the controller 802 may not be provided, and Doppler fading corresponding to the vehicle speed to be simulated may be set for each Doppler modulator 801 in advance.
  • the frequency radiated from the antenna 1 and the antenna 6 positioned behind the terminal position 271 is lower and the frequency radiated from the terminal position 271 is lower.
  • the frequency radiated from the antenna 3 and the antenna 4 which are located at is set high.
  • the antenna 1 to the antenna 6 may be a horn antenna 301, a dipole antenna 302, or an antenna array including a distribution synthesizer 401 and a plurality of antennas 402, as in the above-described example.
  • control unit 802 adjusts the plurality of variable phase shifters 203 and the plurality of variable attenuators 204, so that the level and the relative phase amount of the radio wave correspond to the antenna, respectively. May be varied with time to simulate level fluctuation and phase fluctuation due to fading.
  • the spectrum of the signal on the frequency axis when simulating wideband signal transmission will be described with reference to FIG.
  • the RF signal (center frequency fc) exchanged by a plurality of antennas is changed to the traveling direction of the moving body and the DoA (Direction of Arrival) of each component of the multiplexed wave.
  • DoA Direction of Arrival
  • the Doppler shift indicated by the angle between the direction of the incoming wave and the traveling direction is given.
  • FIG. 11 shows a spectrum of a signal on the frequency axis of a single incoming wave when a broadband signal transmission time is simulated. Note that a Doppler shift can be directly applied to the RF signal, or equivalent modulation can be performed at an intermediate frequency or baseband using a device using frequency conversion.
  • a Doppler modulator 801 connected to an antenna (eg, a dipole antenna 302) that simulates a point wave source that simulates diffraction from an edge (Corresponding to a call), by using inputs and outputs from a variable attenuator 204 or a variable phase shifter 203 connected to a plurality of delay time adjustment units 601, a plurality of incoming waves diffracted at a single diffraction point are simulated
  • the transmission / reception performance can be simulated more accurately.
  • the Doppler modulator 801 has a function of making each Doppler shift amount variable in time, and the control unit 802 controls the time variable function.
  • the antenna that simulates the plane wave shown in FIG. 3 and the like uses an array antenna, and passes through the element antenna included in the array antenna according to the direction of arrival to be simulated.
  • a function of making the amount of phase shift to be variable may be provided. That is, you may change the relative phase between the signals which pass a some element antenna according to an arrival direction.
  • a dummy human body for simulating the operator's body may be provided at a position corresponding to the terminal operator in the vicinity of the terminal in the car on the site where the field test is performed.
  • antennas that radiate orthogonally polarized waves are placed in each wave source, and a variable attenuator for simulating the cross-polarization ratio in a plurality of signal lines connected to them. May be connected.
  • the radio wave propagation simulation apparatus of the fourth example described above even when the measurement vehicle is moving, it is possible to reproduce the reception situation caused by the arrival direction of the radio wave to the wireless communication device in the vehicle.
  • the antenna position, the number of antennas, the variable phase shifter, and the variable attenuator of the radio wave propagation simulation apparatus of the present embodiment are adjusted. This is merely an example, and procedures can be added, omitted, or changed in order within the range where there is no problem.
  • the measuring instrument and the base station simulator 201 are directly connected through a cable and an attenuator.
  • the measuring device measures a received signal and is, for example, a tester.
  • the fluctuation characteristic of the received signal at the ultra-weak electric field level is measured (step S1201).
  • the measuring instrument is ideal, fluctuations should not be seen when receiving a reception signal with an ultra-weak electric field level, but in actual measuring instruments, fluctuations may be seen. .
  • threshold values (first threshold value, second threshold value) indicating whether or not the levels used in the subsequent steps are the same. , The third threshold value, etc.) is set to the above fluctuation range or a value exceeding it.
  • steps S1202 to S1205 below, measurement is performed at an outdoor field test site.
  • the arrival direction of the received signal outside the vehicle is measured using a measuring instrument (step S1202).
  • the incoming wave direction of the received signal in a state in which the person in the vehicle does not sit is measured (step S1203).
  • the direction of the incoming wave of the received signal with the measurer in the vehicle sitting is measured (step S1204).
  • the reception level distribution of the reception signal is measured by the omnidirectional antenna in a state where the measurement person in the vehicle does not sit (step S1205). From step S1202 to step S1205, the situation of the arrival of multiple waves and the invasion propagation into the vehicle of FIG. 1 is measured.
  • Step S1206 The wave source corresponding to the incoming wave of the received signal in a state where the measurer in the vehicle does not sit is estimated from the measurement results of Step S1202 and Step S1203.
  • the signal level from each element antenna is determined so that the wave source of the incoming wave from outside the vehicle is simulated using an array antenna in which a plurality of element antennas are arranged in parallel.
  • the signal level from each element antenna or the shape of the reflected scattering object model is determined so that the source of the incoming wave due to reflected scattering in the car is simulated using a model of a single element antenna or reflected scattering object. To do.
  • step S1207 the direction of the incoming wave of the received signal when the measurer is not sitting is measured.
  • step S1203 and the arrival direction measured in step S1207 can be regarded as matching. If they can be regarded as matching, the process proceeds to step S1210, where they match. If it cannot be considered, the process proceeds to step S1209 (step S1208).
  • Whether the arrival directions match can be determined by, for example, determining whether the difference between the arrival directions is smaller than the first threshold value. When it is smaller than the first threshold, it is considered that the arrival directions coincide.
  • step S1207 the level and phase of the signal from each element antenna are adjusted, or an element antenna to be a wave source is added, and the process returns to step S1207 (step S1209).
  • the reception level distribution of the reception signal is measured by the omnidirectional antenna in a state where the measurer in the vehicle does not sit (step S1210). Thereafter, it is determined whether or not the reception level distribution in step S1205 and the reception level distribution in step S1210 can be regarded as matching (step S1211).
  • reception level distributions can be regarded as being coincident is, for example, (the size of the area of the coincident portion in the distribution) / (the sum of the sizes of the areas of both reception level distributions) from the second threshold value. Is also large, it is considered that the reception level distributions match.
  • step S1209 If it cannot be considered that the reception level distributions match, the level and phase of the signal from each element antenna are adjusted or an element antenna to be a wave source is added as in step S1209, and the process returns to step S1210. If it can be assumed that the reception level distributions match, the incoming / outgoing call test is performed with the measurer sitting while using the radio wave propagation simulation apparatus of the embodiment (step S1213). This incoming / outgoing call test is also called indoor simulation of field test. However, in step S1213, when it is desired to examine the state where the measurer does not sit, an incoming / outgoing call test is performed without the measurer sitting.
  • step S1213 If there is an outdoor field test incoming / outgoing call test result, it is compared with the incoming / outgoing call test result in step S1213. If the difference between the two results is greater than the third threshold, the field test indoor simulation is accurate. If not, the process returns to step S1209 or step S1212 (step S1214). If the difference between the results is less than or equal to the third threshold value, perform the required number of incoming / outgoing call tests to determine whether or not the test has been completed. Returning to step S1213, if the necessary number of incoming / outgoing call tests are being performed, the process is terminated (step S1215).
  • steps S1210, S1211, and S1212 may be omitted. If these steps are omitted, the process proceeds to step S1213 when the arrival directions can be regarded as matching in step S1208, and if it is determined in step S1214 that the indoor simulation of the field test is not accurate, the process proceeds to step S1209. move on.
  • the direction of arrival and the signal level are determined by using the structure of the measurement vehicle and the direction of arrival of multiple waves or the position of the measurer in the vehicle as input conditions.
  • the procedure in step S1206 in the flow shown in FIG. 12 can be changed as shown in FIG.
  • Step S1301 In addition to the arrival direction of the reception signal outside the vehicle measured in Step S1202, the structure of the measurement vehicle and the arrival direction of the multiplexed wave, or the position of the measurer in the vehicle, the measurement is performed in the vehicle, and is carried in the vehicle. The arrival direction and signal level of each incoming wave to the telephone are identified. Instead of in-vehicle measurements, the ray tracing method is used to calculate incoming waves from the outside of the car and reflected waves from the inside of the car, and the arrival direction of each incoming wave to the mobile phone in the car. The signal level may be estimated.
  • Step S1302 The wave source corresponding to the incoming wave of the received signal when the in-vehicle measurer is not sitting is identified mainly from the measurement results of Step S1202 and Step S1203 and the estimation result by the ray tracing method.
  • the signal level from each element antenna is determined so that the wave source of the incoming wave from outside the vehicle is simulated using an array antenna in which a plurality of element antennas are arranged in parallel.
  • the signal level from each element antenna or the shape of the reflected scattering object model is determined so that the source of the incoming wave due to reflected scattering in the car is simulated using a model of a single element antenna or reflected scattering object. To do.
  • a transmission / reception antenna that simulates the arrival wave source is provided at a position corresponding to the arrival direction of the radio wave to the terminal in the vehicle, and the signal level of the transmission / reception signal at the antenna is determined from the arrival direction.
  • the radio wave propagation simulation device of this embodiment it is possible to simulate the accurate radio wave condition in the vehicle in the ultra-low electric field region, so that the field test is repeated many times to the actual ultra-low electric field region. There is no need to go out and the test time can be shortened.
  • the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage.
  • various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.
  • constituent elements over different embodiments may be appropriately combined.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

Selon l'invention, l'état de réception dû à la direction d'arrivée d'ondes radio sur un terminal dans un véhicule est reproduit. L'invention porte sur un appareil de simulation de la propagation d'ondes qui est pourvu d’une antenne (205) qui simule la source d'ondes d'arrivée des ondes radio arrivant sur un dispositif de communication sans fil disposé dans le véhicule, dans un champ dans lequel un essai de champ est effectué, et d’un moyen de réglage de niveau (204) qui règle le premier niveau de signal des premiers signaux transmis à partir de l'antenne. Le moyen de réglage de niveau règle le premier niveau de signal de telle sorte que le premier niveau de signal correspond au niveau de signal des ondes radio.
PCT/JP2009/069639 2008-11-21 2009-11-19 Appareil et procédé de simulation de la propagation d'ondes radio WO2010058818A1 (fr)

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JP2008-298535 2008-11-21
JP2008298535A JP2010124415A (ja) 2008-11-21 2008-11-21 電波伝搬模擬装置および方法

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CN107592145A (zh) * 2017-09-14 2018-01-16 中国电子科技集团公司第四十研究所 一种衰减移相矩阵的级联实现装置及方法
WO2020185186A1 (fr) * 2019-03-11 2020-09-17 Istanbul Medipol Universitesi Procédé d'émulation de canal
CN113533876A (zh) * 2020-04-15 2021-10-22 百度（美国）有限责任公司 用于执行自主驾驶车辆的电磁兼容性测试的方法和系统
CN114285497A (zh) * 2021-12-18 2022-04-05 安徽江淮汽车集团股份有限公司 一种车载收音机性能测试方法及系统

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JP5844396B2 (ja) * 2014-01-30 2016-01-13 アンリツ株式会社 移動体端末試験装置および試験方法
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07162376A (ja) * 1993-12-10 1995-06-23 Hitachi Ltd 端末通信状態試験装置
JPH11340930A (ja) * 1998-05-27 1999-12-10 Mitsubishi Electric Corp 無線端末試験装置
JP2000151499A (ja) * 1998-11-12 2000-05-30 Mitsubishi Electric Corp 無線通信端末評価装置
JP2001004499A (ja) * 1999-06-18 2001-01-12 Mitsubishi Electric Corp 試験装置
US20050085223A1 (en) * 2003-10-20 2005-04-21 Accton Technology Corporation System and method for multi-path simulation
JP2006128748A (ja) * 2004-10-26 2006-05-18 Nissan Motor Co Ltd 車載用無線通信装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07162376A (ja) * 1993-12-10 1995-06-23 Hitachi Ltd 端末通信状態試験装置
JPH11340930A (ja) * 1998-05-27 1999-12-10 Mitsubishi Electric Corp 無線端末試験装置
JP2000151499A (ja) * 1998-11-12 2000-05-30 Mitsubishi Electric Corp 無線通信端末評価装置
JP2001004499A (ja) * 1999-06-18 2001-01-12 Mitsubishi Electric Corp 試験装置
US20050085223A1 (en) * 2003-10-20 2005-04-21 Accton Technology Corporation System and method for multi-path simulation
JP2006128748A (ja) * 2004-10-26 2006-05-18 Nissan Motor Co Ltd 車載用無線通信装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015113667A1 (fr) * 2014-01-30 2015-08-06 Per-Simon Kildal Procedes et appareils pour tester une communication sans fil par voie hertzienne vers des vehicules
CN106471383A (zh) * 2014-01-30 2017-03-01 兰洛斯公司 用于测试与车辆的无线通信的方法和装置
CN107592145A (zh) * 2017-09-14 2018-01-16 中国电子科技集团公司第四十研究所 一种衰减移相矩阵的级联实现装置及方法
CN107592145B (zh) * 2017-09-14 2020-06-09 中国电子科技集团公司第四十一研究所 一种衰减移相矩阵的级联实现装置及方法
WO2020185186A1 (fr) * 2019-03-11 2020-09-17 Istanbul Medipol Universitesi Procédé d'émulation de canal
CN113533876A (zh) * 2020-04-15 2021-10-22 百度（美国）有限责任公司 用于执行自主驾驶车辆的电磁兼容性测试的方法和系统
CN114285497A (zh) * 2021-12-18 2022-04-05 安徽江淮汽车集团股份有限公司 一种车载收音机性能测试方法及系统

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