WO2016129244A1 - 到来方向推定装置 - Google Patents

到来方向推定装置 Download PDF

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Publication number
WO2016129244A1
WO2016129244A1 PCT/JP2016/000526 JP2016000526W WO2016129244A1 WO 2016129244 A1 WO2016129244 A1 WO 2016129244A1 JP 2016000526 W JP2016000526 W JP 2016000526W WO 2016129244 A1 WO2016129244 A1 WO 2016129244A1
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WO
WIPO (PCT)
Prior art keywords
arrival
direct wave
arrival direction
wave
antenna
Prior art date
Application number
PCT/JP2016/000526
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English (en)
French (fr)
Japanese (ja)
Inventor
正義 佐竹
達人 竹内
健一郎 三治
Original Assignee
株式会社デンソー
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 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2016129244A1 publication Critical patent/WO2016129244A1/ja

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction
    • G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems

Definitions

  • the present disclosure relates to an apparatus (Apparatus) that estimates a direction in which a transmitter exists using a wireless communication signal.
  • a radio communication signal in a high UHF band (several GHz) transmitted from a system to be measured is received by each element of an array antenna included in the measurement system, and the system to be measured is based on reception intensity and phase information of the received signal.
  • a radio communication signal in a high UHF band severe GHz
  • the system to be measured is based on reception intensity and phase information of the received signal.
  • the conventional technique needs to move the position of the measurement system (especially the array antenna), and may not be applied under conditions where the position of the measurement system is fixed.
  • This disclosure is intended to provide a technique for realizing selection of reflected waves and direct waves even when the position of the array antenna is fixed.
  • the arrival direction estimation device estimates an arrival direction of an incoming wave according to reception signals from m antenna elements (m is an integer of 3 or more) configuring an array antenna. Yes, the first direction candidate calculation unit, the direct wave selection unit, and the arrival direction determination unit are provided.
  • the first azimuth candidate calculation unit includes a plurality of partial arrays in which the array antennas are each composed of n (1 ⁇ n ⁇ m) antenna elements and the center positions of the antenna elements in the arrangement direction are different from each other. For each antenna, the arrival direction of the incoming wave is determined according to the received signal from the partial array antenna.
  • the direct wave selection unit selects the direct wave that directly arrives from the transmission source by comparing the arrival directions of the incoming waves obtained for each partial array antenna by the first direction candidate calculation unit.
  • the arrival direction determination unit determines the arrival direction estimation result using the arrival direction of the direct wave selected by the direct wave selection unit.
  • FIG. 1 It is a block diagram which shows the structure of a position estimation system. It is explanatory drawing which shows the structure of an array antenna and the setting of a partial array antenna. It is a flowchart of a direct wave arrival direction estimation process. It is a flowchart of the direct wave selection process performed in the direct wave arrival direction estimation process. It is explanatory drawing which shows each parameter used for selection of a direct wave and a reflected wave. It is explanatory drawing which shows the other setting method of a partial array antenna. It is explanatory drawing which shows the other setting method of a partial array antenna. It is explanatory drawing which shows the other setting method of a partial array antenna. It is explanatory drawing which shows the other setting method of a partial array antenna.
  • the position estimation system 1 includes a device under measurement (transmission side device) 2 and a measurement device (reception side device) 3.
  • the device under measurement 2 includes, for example, a mobile phone or a smart key, and the measurement device 3 is configured as an on-vehicle device mounted on a vehicle, for example.
  • the device under measurement 2 includes an antenna 21, a transmitter 22, and a communication controller 23.
  • the transmitter 22 transmits a wireless communication signal according to a predetermined communication standard (for example, WiFi (registered trademark) or Bluetooth® (registered trademark)) using the high UHF band (several GHz) via the antenna 21.
  • the communication controller 23 controls communication using a wireless communication signal.
  • the radio wave transmitted by the device under test 2 is also referred to as “designated wave”.
  • the measuring apparatus 3 includes a first array antenna 31, a second array antenna 32, a first receiving unit 33, a second receiving unit 34, and a position estimating unit 35.
  • the array antenna device can also be referred to as including a first array antenna 31 and a second array antenna 32.
  • the arrival direction estimation device can be referred to as including a first reception unit 33 and a second reception unit 34.
  • the first receiving unit 33 estimates the arrival direction of the received designated wave according to the received signal from the first array antenna 31, and the first estimation direction DR ⁇ b> 1 that is the estimation result is sent to the position estimating unit 35.
  • the second receiving unit 34 estimates the arrival direction of the received designated wave according to the received signal from the second array antenna 32, and supplies the second estimation direction DR2 that is the estimation result to the position estimating unit 35.
  • the first reception unit 33 includes an element switch 331, a receiver 332, and a direct wave arrival direction estimation unit 333.
  • the element switch 331 receives reception signals from the antenna elements E1 to Em constituting the first array antenna 31, and receives reception signals from the antenna elements selected in accordance with instructions from the direct wave arrival direction estimation unit 333.
  • a setting for selecting n antenna elements from the other end (right end in the figure) of the antenna is denoted as Y2.
  • the array antenna configured by the antenna elements selected by the setting Y1 or Y2 is hereinafter referred to as a partial array antenna.
  • the number of antenna elements constituting the partial array antenna (hereinafter referred to as “number of elements (also referred to as element count)”) n is the maximum number of incoming waves (total number of direct waves and reflected waves) that may be received simultaneously.
  • n is also referred to as the first specific number.
  • the second specific number is referred to as being greater than the first specific number. It can be said that m is an example of the second specific number.
  • the receiver 332 samples the received signal supplied via the element switch 331 and supplies it to the direct wave arrival direction estimation unit 333.
  • the direct wave arrival direction estimation unit 333 is also referred to as a direct wave arrival direction estimation circuit 333.
  • the direct wave arrival direction estimation unit 333 includes, as an example, a known microcomputer including a CPU, a ROM, and a RAM. A direct wave arrival direction estimation process for estimating the arrival direction of the direct wave by processing the sampled reception signal (hereinafter referred to as reception data) supplied from 332 is executed.
  • the position estimator 35 is also referred to as a position estimator circuit 35.
  • the position estimator 35 is a known microcomputer including a CPU, a ROM, and a RAM, and is estimated by the first receiver 33.
  • the first estimated azimuth DR1 the second estimated azimuth DR2 estimated by the second receiver 34, the installation interval of the first array antenna 31 and the second array antenna 32, etc.
  • the designated wave is used using a known triangulation technique.
  • the position of the device under measurement 2 that is the transmission source of is estimated.
  • the described flowchart includes a plurality of sections (or referred to as steps), and each section is expressed as, for example, S110. Further, each section can be divided into a plurality of subsections, while a plurality of sections can be combined into one section.
  • Each section can be referred to as a device, module, or proper name, for example, a calculation section can be referred to as a calculation device, a calculation module, or a calculator.
  • the section includes (i) not only a section of software combined with a hardware unit (eg, a computer) but also (ii) a section of hardware (eg, an integrated circuit, a wiring logic circuit) and related devices. It can be realized with or without the function.
  • the hardware section can be included inside the microcomputer.
  • the CPU functioning as the direct wave arrival direction estimation unit 333 initializes the setting of the element switch 331 to Y0 which is a setting for selecting all antenna elements in S110.
  • the process waits until a designated wave that is a radio wave transmitted by the device under test 2 is received. When the designated wave is received, the process proceeds to S130.
  • the arrival directions of all incoming waves are estimated by executing high-resolution azimuth estimation processing such as MUSIC (Multiple Signal Classification) using received signals from all antenna elements.
  • MUSIC Multiple Signal Classification
  • all arrival directions detected by the process in S120 are stored in the memory as orientation candidates.
  • a direct wave selection process for selecting a direct wave is executed using a partial array antenna.
  • a direct wave is selected in S280 described later.
  • S160 among the azimuth candidates stored in S140, the one closest to the arrival direction (selected azimuth) of the incoming wave selected as the direct wave in S150 is determined as the estimation result of the direct wave arrival direction, This process ends.
  • a parameter i used for switching setting of the element switch 331 is initialized to 1.
  • the element switch 331 is set to Yi.
  • the process waits until a designated wave is received.
  • the arrival directions ⁇ ia, ⁇ ib,... Of the designated wave are estimated using received signals from the respective antenna elements constituting the partial array antenna corresponding to the setting Yi in S240.
  • the difference of an incoming wave shall be represented by a, b, c, ... (refer FIG. 5).
  • step S250 the parameter i is incremented.
  • S270 calculates, for each detected incoming wave a, b,..., Angle differences ⁇ a, ⁇ b,... Of arrival directions detected by the partial array antennas (see FIG. 5). Whether or not two arrival directions detected by different switching settings are due to the same arrival wave is determined based on whether or not the angle difference between the two arrival directions is within a predetermined range.
  • the direct wave arrival direction estimation unit 333 executes S210 to S260 as a first direction candidate calculation unit, S270 to S280 as a direct wave selection unit, and S110 to S140 and S160 as an arrival direction determination unit. Further, among the arrival direction determination units, S110 to S140 are also referred to as second orientation candidate calculation units, and S160 is also referred to as a selection unit.
  • the measuring device 3 constituting the position estimation system 1 uses a single array antenna 31 as a plurality of partial antennas set so that the center positions are different from each other, thereby allowing a plurality of different positions. Since the reception signal at the point is obtained, the direct wave and the reflected wave can be selected without moving the measuring device 3.
  • the measuring apparatus 3 selects a direct wave according to the arrival direction of the low resolution estimated using the reception signal from the partial array antenna, and uses the reception signals from all the array antennas as the arrival direction of the direct wave.
  • the direction of arrival with high resolution estimated in this way is used. Thereby, a highly accurate estimation result of the direction of arrival can be obtained.
  • the functions of the direct wave arrival direction estimation unit 333 and the position estimation unit 35 are realized by processing executed by a microcomputer.
  • the realization of each of these units by software is merely an example, and as described above in the description of the flowchart, the whole or a part thereof may be realized by hardware such as a logic circuit. .
  • the partial array antenna one that selects n antenna elements from one end of m array antennas and one that selects n antenna elements from the other end are used.
  • n is increased, the position difference between the two partial array antennas is reduced, so the resolution of the angle difference is degraded.
  • the number of incoming waves is increased because the number of elements is increased. The smaller the resolution, the lower the resolution of the angle difference, but the number of detectable incoming waves decreases.
  • the partial array antennas do not necessarily need to be set at both ends, and the center positions of the partial antennas may be different. As shown in FIG. 6C, if the total number of elements of the array antenna is m and the number of elements of the partial array antenna is n, (mn + 1) types of partial array antennas can be set. More than one can be used.
  • the arrival direction obtained using the entire array antenna is set as the direct wave arrival direction.
  • the arrival direction obtained using the partial array antenna may be directly used as the direct wave arrival direction. Good.
  • the element switch 331 is switched according to the setting of the partial array antenna to be used, and the received signal is reacquired for each setting. However, reception of all antenna elements constituting the array antenna is performed. When signals are acquired in a lump and stored in a memory and a process related to a partial array antenna is executed, a stored value of a received signal from a corresponding antenna element may be read and processed. In this case, since the element switch 331 can be omitted, the apparatus configuration can be simplified.
  • a device in addition to the arrival direction estimation devices (the first reception unit 33 and the second reception unit 34), a device (measurement device 3) or a system (position estimation system 1) including the arrival direction estimation device as a constituent element It can also be realized in various forms.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
PCT/JP2016/000526 2015-02-12 2016-02-02 到来方向推定装置 WO2016129244A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-025689 2015-02-12
JP2015025689A JP6538366B2 (ja) 2015-02-12 2015-02-12 到来方向推定装置

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WO2016129244A1 true WO2016129244A1 (ja) 2016-08-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018180535A1 (ja) * 2017-03-27 2018-10-04 日本電気株式会社 アンテナ角度調整用装置、アンテナ角度調整システム、アンテナ角度調整方法、および通信装置
WO2023143562A1 (zh) * 2022-01-29 2023-08-03 维沃移动通信有限公司 来波方向估计方法、终端及网络侧设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6812955B2 (ja) 2017-02-28 2021-01-13 株式会社Ｓｏｋｅｎ 位置判定システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005001504A1 (ja) * 2003-06-25 2005-01-06 Fujitsu Limited 電波到来方向推定方法及び装置
JP2006125993A (ja) * 2004-10-28 2006-05-18 Advanced Telecommunication Research Institute International 直接波到来方向推定装置
JP2007303921A (ja) * 2006-05-10 2007-11-22 Kddi Corp 信号源位置推定方法
JP2011128088A (ja) * 2009-12-18 2011-06-30 Keio Gijuku 位置推定システム及びプログラム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005001504A1 (ja) * 2003-06-25 2005-01-06 Fujitsu Limited 電波到来方向推定方法及び装置
JP2006125993A (ja) * 2004-10-28 2006-05-18 Advanced Telecommunication Research Institute International 直接波到来方向推定装置
JP2007303921A (ja) * 2006-05-10 2007-11-22 Kddi Corp 信号源位置推定方法
JP2011128088A (ja) * 2009-12-18 2011-06-30 Keio Gijuku 位置推定システム及びプログラム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018180535A1 (ja) * 2017-03-27 2018-10-04 日本電気株式会社 アンテナ角度調整用装置、アンテナ角度調整システム、アンテナ角度調整方法、および通信装置
WO2023143562A1 (zh) * 2022-01-29 2023-08-03 维沃移动通信有限公司 来波方向估计方法、终端及网络侧设备

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JP2016148591A (ja) 2016-08-18
JP6538366B2 (ja) 2019-07-03

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