WO2001052446A1 - Array antenna radio communication apparatus and calibration method - Google Patents
Array antenna radio communication apparatus and calibration method Download PDFInfo
- Publication number
- WO2001052446A1 WO2001052446A1 PCT/JP2001/000204 JP0100204W WO0152446A1 WO 2001052446 A1 WO2001052446 A1 WO 2001052446A1 JP 0100204 W JP0100204 W JP 0100204W WO 0152446 A1 WO0152446 A1 WO 0152446A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- correction amount
- communication
- amount
- array antenna
- phase rotation
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
- H04B17/22—Monitoring; Testing of receivers for calibration; for correcting measurements for calibration of the receiver components
- H04B17/221—Monitoring; Testing of receivers for calibration; for correcting measurements for calibration of the receiver components of receiver antennas, e.g. as to amplitude or phase
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/267—Phased-array testing or checking devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
- H04B17/22—Monitoring; Testing of receivers for calibration; for correcting measurements for calibration of the receiver components
Definitions
- the present invention relates to an array antenna wireless communication device and a calibration method.
- An array antenna wireless communication device is a wireless communication device that includes a plurality of antennas and can freely set directivity by adjusting the amplitude and phase of a signal received by each antenna. Adjustment of the amplitude and phase of the received signal is performed by multiplying the received signal by a complex coefficient (hereinafter, this complex coefficient is called “weight”).
- the array antenna wireless communication apparatus can strongly receive only a signal arriving from a desired direction by adjusting the weight to be multiplied. This is called having reception directivity.
- the array antenna wireless communication device has a reception directivity so that it can receive a signal arriving from each direction.
- each radio receiving circuit that down-converts the frequency of each received signal received via a plurality of antennas to a baseband or the like have variations due to variations in characteristics of analog elements such as amplifiers. More, it is different. As a result, different unknown amplitude fluctuations and phase rotations are added to each received signal, and a directivity different from that expected to be obtained by multiplying the weights is formed. There are cases. In order to prevent the above phenomenon, it is necessary to make adjustments so that the characteristics of each wireless receiving circuit are the same. However, the characteristics of analog devices such as amplifiers And it is extremely difficult to adjust in a timeless manner.
- the characteristics of each wireless receiving circuit are measured and stored, and the amplitude and phase of the received signal are changed by an error of the characteristics.
- the weights to be multiplied are determined in consideration of the conversion. Such an adjustment method is called “calibration”.
- Calibration includes: 1) Before starting communication, the characteristic error of each wireless receiver circuit is measured in advance using the known calibration signal, and stored in the correction table in advance as the characteristic error to be corrected during communication. During communication, the fixed correction table is used to perform reception processing so as to cancel the characteristic error of the wireless reception circuit. 2) To cope with the temporal change in the characteristic of the wireless reception circuit, During communication, the characteristic error of each wireless receiving circuit is measured at any time using a calibration signal, and stored as a characteristic error to be corrected in a correction table at any time. Using this adaptive correction table, the wireless receiving circuit is used. And one that performs reception processing so as to cancel out the characteristic error of.
- the conventional array antenna wireless communication device and the conventional method have the following problems.
- An object of the present invention is to provide an array antenna radio communication device and a calibration method capable of performing calibration with high accuracy while suppressing interference to communication.
- the inventors of the present invention use the calibration performed before the start of communication and the calibration performed after the start of communication in different roles in combination, thereby suppressing interference with the communication and increasing the time with the passage of time.
- the present inventors have found that a decrease in the reliability of calibration can be suppressed, and have led to the present invention.
- the present invention utilizes a calibration performed before the start of communication in order to obtain a highly reliable correction amount in advance with a sufficient number of samples before the start of communication, and In order to maintain the reliability of the correction amount by adjusting the correction amount with a small number of samples in the middle, the calibration performed after the start of communication is used.
- FIG. 1 is a block diagram showing a configuration of a communication system using an array antenna wireless communication device according to one embodiment of the present invention.
- FIG. 2 shows an operation of the array antenna wireless communication apparatus according to one embodiment of the present invention. It is a flowchart for demonstrating.
- FIG. 3A is a diagram showing the contents of a correction table provided in the array antenna wireless communication device according to one embodiment of the present invention.
- FIG. 3B is a diagram showing the contents of a correction table provided in the array antenna wireless communication device according to one embodiment of the present invention.
- FIG. FIG. 4 is a diagram showing the contents of a correction table provided in the array antenna wireless communication device according to one embodiment of the present invention.
- FIG. 4 is a schematic diagram showing a state in which a signal received by the array antenna wireless communication apparatus according to one embodiment of the present invention and a CAL signal are multiplexed.
- FIG. 5 is a schematic diagram showing a state in which a signal received by the array antenna wireless communication apparatus according to one embodiment of the present invention and a CAL signal are multiplexed.
- FIG. 6 is a block diagram showing a configuration of a communication system using the array antenna wireless communication device according to one embodiment of the present invention.
- FIG. 1 is a block diagram showing a configuration of a communication system using an array antenna wireless communication device according to one embodiment of the present invention.
- FIG. 2 shows a case where base station 101 equipped with array antenna radio communication apparatus according to the present embodiment communicates with mobile station 115.
- the mobile station 1 15 transmits a radio signal to the base station 101.
- a calibration signal (hereinafter abbreviated as "CAL signal") generating section 102 generates a CAL signal.
- the CAL signal spreading section 103 applies a spreading process to the CAL signal.
- Athens 104 controls the power of the CAL signal.
- the adder 107 and the adder 108 respectively convert the signal received from the mobile station 115 via the antenna 105 and the antenna 106 and the CAL signal. Multiplex.
- the AGC (Auto Gain C ontoro 1) unit 109 outputs the signal with constant power.
- Demodulation section 110 performs a predetermined demodulation process on the signal. 0 1 ⁇
- the signal despreading unit 1 11 1 performs despreading processing on the signal to extract the CAL signal.
- the measuring section 1 12 measures the amount of phase rotation of the CAL signal.
- the comparing unit 113 compares the amount of phase rotation measured by the measuring unit 112 with the contents of the correction table stored in the recording unit 114, and updates the correction table.
- the recording unit 114 stores, as an initial state, a correction table created based on the measurement result performed by the base station 101 before starting communication, and the correction table is stored in the comparison unit 113. According to the result, it is updated as needed during the communication of the base station 101.
- a plurality of systems (for the number of mobile stations) of demodulation units 110 to recording units 114 are prepared in order to demodulate received signals from a plurality of mobile stations. In the present embodiment, only one system will be described for convenience of description.
- FIG. 2 is a flowchart for explaining the operation of the array antenna wireless communication apparatus according to one embodiment of the present invention.
- 3A to 3C are diagrams showing the contents of the correction tables provided in the array antenna wireless communication device according to one embodiment of the present invention.
- FIG. 4 is a schematic diagram showing a state in which a signal received by the array antenna wireless communication apparatus according to one embodiment of the present invention and a CAL signal are multiplexed.
- the correction table as shown in FIGS. 3A to 3C, a graph showing the correspondence between the power value and the correction amount of the phase rotation is used.
- step (hereinafter abbreviated as “ST”) 201 the base station 101 responds to each power value while changing the power value of the CAL signal before starting communication. Measure the amount of phase rotation to be performed and save it on the correction table.
- the CAL signal spreading unit 103 performs a spreading process, and the Athens 104 successively supplies power. Change.
- the 180 ° section 109 sets the power value of the CAL signal to a predetermined constant value and outputs it to the demodulation section 110.
- the AGC unit 109 outputs a value indicating the amount of change in the power value to the measuring unit 112 and the recording unit 114.
- the CAL signal demodulated by the demodulation unit 110 is despread by the CAL signal despreading unit 111 and output to the measurement unit 112.
- the measuring unit 112 returns the CAL signal to the original power value according to the value indicating the amount of change in the power value output from the AGC unit 109, and then measures the phase rotation amount of the CAL signal. Since the CAL signal is a known signal, measurement section 112 measures the amount of phase rotation by comparing the despread CAL signal with the known signal. The measured phase rotation amount is output to the recording unit 114.
- the recording unit 114 sequentially plots the phase rotation amount (corrected phase angle) for each power value according to the value indicating the amount of change in the power value output from the AGC unit 109, as shown in FIG. 3A. I will continue.
- a highly reliable correction table 301 as shown in FIG. 3A is stored in the recording unit 114 in advance with a sufficient number of samples before starting communication.
- base station 101 when communication is started in ST 202, after that, base station 101 performs the processing of ST 203 to ST 207 during communication, and updates the correction table as needed. After the start of communication, the base station 101 operates as follows. In the following description, a detailed description of a portion performing the same operation as before the start of communication is omitted.
- the CAL signal output from Athens Night 104 and the received signal from mobile station 115 are added by adder 107 and adder 108 as shown in FIG. Multiplexed.
- the multiplexed signal is set to a predetermined constant power value in the AGC unit 109 and demodulated in the demodulation unit 110.
- the demodulated signal is despread by the CAL signal despreading unit 111 to extract the CAL signal.
- the processing shown in ST203 to ST207 is repeatedly performed.
- the measurement unit 112 measures the amount of phase rotation of the CAL signal. Specifically, the measuring unit 112 returns the CAL signal to the original power value (received signal power shown in Fig. 4) according to the value indicating the amount of change in the power value output from the AGC unit 109. After that, the phase rotation amount of the CAL signal is measured, and the measurement result is output to the comparison unit 113.
- the comparison unit 113 sets the phase rotation amount measured by the measurement unit 112 and the correction table stored in the recording unit 114. To the value of. Specifically, as shown in FIG. 3B, the comparing unit 113 compares the measurement result 302 during communication with the contents of the correction table 301 for each power value.
- the comparison unit 113 detects the measurement result 302 during communication.
- the error between 2 and the correction table 301 is measured.
- the comparison unit 113 sets the correction table 300 stored in the recording unit 114 so as to minimize the square of the measured error as shown in FIG. 3C. 1 is updated to the correction table 3 03.
- the base station 101 corrects the phase rotation of the received signal using the correction table updated as needed.
- a highly reliable correction table 301 obtained in advance by a sufficient number of samples before the start of communication is used to obtain the measurement result 30 0 during communication. 2 is updated to the correction table 303 as needed. Therefore, since the reliability of the correction table is maintained high, it is possible to prevent the reliability of the calibration result from decreasing over time, thereby preventing the performance of the array antenna from deteriorating. can do.
- the measurement result 302 during communication is A small number of samples is sufficient to maintain reliability. For this reason, a very small number of samples is sufficient during communication compared to the conventional method of performing calibration only during communication. Therefore, the number of occurrences of the CAL signal that interferes with the communication signal can be extremely reduced, so that it is possible to prevent the reception quality of the communication signal from deteriorating.
- the calibration performed before the start of communication is used to obtain a highly reliable correction amount
- the calibration performed after the start of communication is used to maintain the reliability of the correction amount.
- the CAL signal can be time-division multiplexed with the signal from mobile station 115 as shown in FIG.
- the configuration of the base station 101 is as shown in FIG.
- a CAL signal time-division multiplexing section 601 multiplexes a CAL signal during an idle time of a signal from the mobile station 115.
- CAL signal detection section 602 extracts the CAL signal from the demodulated signal and outputs the CAL signal to measurement section 112.
- the method of updating the correction table using the least square error has been described.
- the method of updating the correction table is not limited to this, and the correction table may be updated using another adaptive algorithm.
- highly reliable correction contents obtained in advance by a sufficient number of samples before the start of communication maintain the reliability.
- correction is made as needed with a small number of samples during communication.
- the calibration method calibration can be performed with high accuracy while suppressing interference to communication, so that interference in communication can be suppressed and high accuracy of calibration can be realized. Can be compatible.
- the present invention is applicable to a base station device used in a mobile communication system.
- the base station apparatus can accurately calibrate a signal received from a mobile station while suppressing interference with communication with the mobile station.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01900769A EP1161002A4 (en) | 2000-01-13 | 2001-01-15 | AREA ANTENNA RADIO COMMUNICATION DEVICE AND CALIBRATION PROCESS |
| AU25539/01A AU2553901A (en) | 2000-01-13 | 2001-01-15 | Array antenna radio communication apparatus and calibration method |
| US09/936,013 US6559799B2 (en) | 2000-01-13 | 2001-03-05 | Array antenna radio communication apparatus and calibration method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000004554A JP2001196834A (ja) | 2000-01-13 | 2000-01-13 | アレーアンテナ無線通信装置およびキャリブレーション方法 |
| JP2000-004554 | 2000-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001052446A1 true WO2001052446A1 (en) | 2001-07-19 |
Family
ID=18533327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2001/000204 Ceased WO2001052446A1 (en) | 2000-01-13 | 2001-01-15 | Array antenna radio communication apparatus and calibration method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6559799B2 (ja) |
| EP (1) | EP1161002A4 (ja) |
| JP (1) | JP2001196834A (ja) |
| CN (1) | CN1147065C (ja) |
| AU (1) | AU2553901A (ja) |
| WO (1) | WO2001052446A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005117286A1 (fr) | 2004-05-31 | 2005-12-08 | Zte Corporation | Procede et appareil d'etalonnage pour une liaison de reception d'un systeme de communication reseau |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4689101B2 (ja) * | 2001-07-30 | 2011-05-25 | 三菱電機株式会社 | 干渉波抑圧装置 |
| JP5111699B2 (ja) * | 2001-07-30 | 2013-01-09 | 三菱電機株式会社 | 干渉波抑圧装置 |
| US20030076257A1 (en) * | 2001-10-24 | 2003-04-24 | Neus Padros | Antenna array monitor and monitoring method |
| US7119834B2 (en) * | 2002-06-06 | 2006-10-10 | Microtune (Texas) L.P. | Receiver and system calibration system and method |
| JP4003229B2 (ja) * | 2002-06-20 | 2007-11-07 | 日本電気株式会社 | アレーアンテナ受信装置 |
| US6720919B1 (en) * | 2002-09-20 | 2004-04-13 | Lucent Technologies Inc. | Phased array calibration using sparse arbitrarily spaced rotating electric vectors and a scalar measurement system |
| WO2004095731A1 (ja) * | 2003-04-21 | 2004-11-04 | Sanyo Electric Co., Ltd. | 受信装置 |
| KR100608736B1 (ko) | 2003-04-29 | 2006-08-04 | 엘지전자 주식회사 | 스마트 안테나 시스템의 기준신호 발생장치 |
| JP4183592B2 (ja) * | 2003-09-26 | 2008-11-19 | 三洋電機株式会社 | 受信方法および装置 |
| JP4217711B2 (ja) * | 2003-10-30 | 2009-02-04 | 三菱電機株式会社 | アンテナ装置 |
| JP4405331B2 (ja) * | 2004-07-06 | 2010-01-27 | 富士通株式会社 | 無線受信装置、無線送信装置及びキャリブレーション方法 |
| JP4595509B2 (ja) * | 2004-11-26 | 2010-12-08 | ソニー株式会社 | 無線通信装置及び無線通信方法、並びにコンピュータ・プログラム |
| JP4355325B2 (ja) * | 2006-04-25 | 2009-10-28 | 京セラ株式会社 | 通信装置及び送信キャリブレーションウエイト算出方法 |
| US7218273B1 (en) * | 2006-05-24 | 2007-05-15 | L3 Communications Corp. | Method and device for boresighting an antenna on a moving platform using a moving target |
| WO2019094324A1 (en) * | 2017-11-13 | 2019-05-16 | X Development Llc | Beamforming calibration |
| CN110350990B (zh) * | 2019-05-21 | 2022-02-18 | 辰芯科技有限公司 | 一种相控阵网络校准方法、装置、设备及存储介质 |
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| JPH01241203A (ja) * | 1988-03-22 | 1989-09-26 | Mitsubishi Electric Corp | ディジタルビームフォーミング装置 |
| JPH08307465A (ja) * | 1995-04-28 | 1996-11-22 | Mitsubishi Electric Corp | 受信装置の補償方法・受信装置及び送受信装置 |
| JPH1146180A (ja) * | 1997-03-18 | 1999-02-16 | Matsushita Electric Ind Co Ltd | アレーアンテナ無線受信装置のキャリブレーション装置 |
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| US6172642B1 (en) * | 1998-07-30 | 2001-01-09 | The United States Of America As Represented By The Secretary Of The Army | Radar system having a ferroelectric phased array antenna operating with accurate, automatic environment-calibrated, electronic beam steering |
-
2000
- 2000-01-13 JP JP2000004554A patent/JP2001196834A/ja active Pending
-
2001
- 2001-01-15 AU AU25539/01A patent/AU2553901A/en not_active Abandoned
- 2001-01-15 EP EP01900769A patent/EP1161002A4/en not_active Withdrawn
- 2001-01-15 CN CNB018000207A patent/CN1147065C/zh not_active Expired - Fee Related
- 2001-01-15 WO PCT/JP2001/000204 patent/WO2001052446A1/ja not_active Ceased
- 2001-03-05 US US09/936,013 patent/US6559799B2/en not_active Expired - Fee Related
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| JPH01241203A (ja) * | 1988-03-22 | 1989-09-26 | Mitsubishi Electric Corp | ディジタルビームフォーミング装置 |
| JPH08307465A (ja) * | 1995-04-28 | 1996-11-22 | Mitsubishi Electric Corp | 受信装置の補償方法・受信装置及び送受信装置 |
| JPH1146180A (ja) * | 1997-03-18 | 1999-02-16 | Matsushita Electric Ind Co Ltd | アレーアンテナ無線受信装置のキャリブレーション装置 |
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| JP2000013454A (ja) * | 1998-06-18 | 2000-01-14 | Matsushita Electric Ind Co Ltd | キャリブレーション装置 |
| JP2000295152A (ja) * | 1999-04-01 | 2000-10-20 | Matsushita Electric Ind Co Ltd | アレーアンテナ無線通信装置 |
| JP2001053527A (ja) * | 1999-05-28 | 2001-02-23 | Matsushita Electric Ind Co Ltd | 通信装置及び通信方法 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005117286A1 (fr) | 2004-05-31 | 2005-12-08 | Zte Corporation | Procede et appareil d'etalonnage pour une liaison de reception d'un systeme de communication reseau |
| CN100550673C (zh) * | 2004-05-31 | 2009-10-14 | 中兴通讯股份有限公司 | 阵列通信系统接收链路的校准装置及方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001196834A (ja) | 2001-07-19 |
| US6559799B2 (en) | 2003-05-06 |
| EP1161002A4 (en) | 2006-06-07 |
| CN1147065C (zh) | 2004-04-21 |
| AU2553901A (en) | 2001-07-24 |
| US20020135512A1 (en) | 2002-09-26 |
| EP1161002A1 (en) | 2001-12-05 |
| CN1358358A (zh) | 2002-07-10 |
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