EP1336264A1 - Antennensystem - Google Patents
AntennensystemInfo
- Publication number
- EP1336264A1 EP1336264A1 EP01900420A EP01900420A EP1336264A1 EP 1336264 A1 EP1336264 A1 EP 1336264A1 EP 01900420 A EP01900420 A EP 01900420A EP 01900420 A EP01900420 A EP 01900420A EP 1336264 A1 EP1336264 A1 EP 1336264A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- receiver
- test
- antenna system
- antenna
- frequency
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
Definitions
- the invention relates to an antenna system.
- Such an antenna system is known from DE 196 18 333 AI.
- the antenna system is part of a mobile radio reception system.
- Antenna system has at least one antenna.
- the signals received by the antenna are fed to a receiver designed as a superimposed receiver.
- the superimposition receiver has a mixer, to which a bandpass filter is assigned on the input side and on the output side.
- An oscillator is also assigned to the mixer.
- the bandpass filter upstream of the mixer is used for image frequency suppression.
- the signal present at the input and the oscillator signal are mixed by means of the mixer.
- the intermediate frequency signal thus obtained is filtered in the bandpass filter downstream of the mixer and then fed to a signal processing unit for further processing.
- the antenna system can be switched from a control mode in which radio signals are received and evaluated to a test mode in which a self-test is carried out.
- a separate transmission antenna and a circuit arrangement connected to the transmission antenna are provided for carrying out the self-test.
- the circuit arrangement has a frequency converter which generates a high-frequency output signal with which the transmitting antenna is controlled.
- the frequency converter is connected to the oscillator of the local receiver.
- the frequency converter is connected to an intermediate frequency oscillator, which is also part of the circuit arrangement.
- an intermediate frequency limiter can be provided, which is connected to the output of the heterodyne receiver.
- the frequency of the high-frequency output signal generated in the frequency converter is predetermined by the intermediate frequency oscillator and the oscillator of the local receiver and thus to the frequency of the
- the high-frequency output signal is capacitively coupled into the antenna of the antenna system via the transmitting antenna.
- the signals present at the output of the heterodyne receiver are recorded by means of a measuring device for carrying out the self-test.
- the object of the invention is to provide an antenna system in which a function check can be carried out with as little effort as possible.
- the antenna system according to the invention has a plurality of antennas which can be connected in predetermined combinations to at least two receivers via a combination unit.
- the antenna system also has a signal processing unit for evaluating the output signals of the receivers and a control unit by means of which at least one of the antennas can be switched to transmit mode in order to carry out a self-test. With a test frequency specified via a first receiver, this antenna sends test signals which are coupled into at least one further antenna which is connected to the second receiver via the combination device and whose frequency is matched to the test frequency.
- Self-tests record the reception levels of the second receiver as actual values and compare them with specified target values.
- the antenna system according to the invention has at least two receivers, which are preferably operated simultaneously during normal operation of the antenna system.
- a first receiver is preferably used for preprocessing radio signals received with an antenna, which are currently being received and output in the radio reception system. With the other receiver, radio signals that are received with further antennas are processed to provide additional functions for the radio reception system.
- Such additional functions can be formed, for example, by reception optimization functions, in particular RDS (Radio Data System) functions. If the radio receiver system is used to receive a radio station at a certain frequency, the second receiver is used to check whether the same content is better on other frequencies, i.e. can be received with signals of higher amplitudes or with a better signal / noise ratio.
- RDS Radio Data System
- the two receivers are used to carry out the self- tests used.
- the self-test and its control are expediently carried out centrally in the control unit.
- control unit switches one of the antennas of the antenna system to transmit mode, this antenna sending test signals, the test frequency of which is predetermined by the first receiver.
- the antenna to be tested is connected to the second receiver, the frequency of which is matched to the test frequency.
- the reception levels of the test signal are recorded as actual values and compared with predetermined target values.
- the main advantage of the antenna system according to the invention is that by using the two receivers to carry out the self-test, separate, additional components can be almost completely dispensed with. The self-test can therefore be carried out with little additional circuitry.
- an antenna of the antenna system can be switched to transmit mode for carrying out the self-test, so that
- test frequency can be tuned via the control unit, so that a comprehensive and reliable function check is guaranteed.
- Figure 1 Block diagram of an exemplary embodiment of the invention
- FIG. 1 shows an exemplary embodiment of the antenna system 1 according to the invention.
- the antenna system 1 is part of a mobile radio reception system, which in the present example is installed in a motor vehicle.
- the antenna system 1 has a plurality of antennas 2, which are preferably integrated in the rear window of the motor vehicle.
- the antennas 2 can be designed differently and can be used to receive radio signals of different frequency ranges.
- individual antennas 2 can also be provided for receiving additional signals, which are used, for example, for the central locking of the motor vehicle.
- the antennas 2 are connected to two receivers 4, 4 'via a combination device 3. In principle, more than two receivers 4, 4 'can also be connected.
- the outputs of the receiver unit are routed to a signal processing unit 5, which is formed by an analog, integrated circuit or a digital signal processor.
- the combination device 3 is formed by a circuit logic, by means of which a predetermined combination of antennas 2 can be switched to each of the receivers 4, 4 '.
- the combination device 3 thus makes a selection as to which antennas 2 are assigned to the individual receivers 4, 4 '.
- the receivers 4, 4 ' are designed as superimposed receivers with an essentially identical structure.
- Each of the receivers 4, 4 ' has a mixer 6, 6', to the first input of which an oscillator 7, T is connected.
- a supply line leads from an output of the combination device 3 via a first bandpass filter 8, 8 'to a second input of the mixer 6, 6'.
- the output of the mixer 6, 6 ' is led to the signal processing unit 5 via a second bandpass filter 9, 9 ".
- the first bandpass filter 8, 8 ' is tuned to the frequency of the radio signals received with the antennas 2.
- the filtered output signal of the combination device 3 and the signal of the oscillator 7, 7 ' are mixed in the mixer 6, 6', as a result of which a lower-frequency intermediate-frequency signal is generated from the high-frequency broadcast signal.
- the intermediate frequency corresponds to the difference between the frequencies of the broadcast signal and the oscillator 7, 7 '.
- the intermediate frequency signal is then filtered in the second bandpass filter 9, 9 'which is permanently set to the intermediate frequency.
- the output signal of the respective receiver 4, 4 'obtained in this way is further processed in the signal processing unit 5.
- the combination device 3 is controlled by a control unit 10, which is preferably formed by a microcontroller.
- the oscillators 7, 7 'of the receivers 4, 4 are also controlled by the control unit 10.
- a self-test is carried out to check the functionality.
- the self-test is preferably carried out during predetermined time intervals which interrupt the normal operation of the antenna system 1.
- a self-test takes place after a motor vehicle has been assembled, during a vehicle's downtime in a workshop and when the radio receiver system is switched on.
- the self-test is carried out and controlled centrally via the control unit 10.
- a switch 11 connected to the control unit 10 is provided to control the self-test.
- the switch 11 is arranged on a feed line which connects the oscillator 7 of the first receiver 4 to the combination device 3.
- a level measuring device 12 is provided at the output of the second receiver 4 ′′.
- the level measuring device 12 is on the control unit 10 is connected so that the received levels detected by the level measuring device 12 can be read into the control unit 10 for further evaluation.
- radio signals in particular These are the radio signals from the radio station that is currently set in the radio reception system.
- At least one further antenna 2 is connected to the other receiver 4 'or 4.
- the radio signals are expediently received and evaluated in this receiver 4 'or 4 in order to provide additional functions for the radio receiver system.
- Such additional functions can in particular be formed by reception optimization functions such as the RDS (Radio Data System) function.
- This function is used to optimize the reception of a specific radio station in the broadcast reception system.
- Radio stations are reproduced via the radio reception system, the radio signals of the same content received with the second receiver 4 'or 4, which are, however, transmitted with different additional frequencies, are evaluated in the background.
- the signal processing unit 5 then examines the frequency at which the radio signals of the same content are optimally received, i.e. for which frequency the highest signal amplitude and / or the best signal / noise ratio is obtained. Then the broadcast signals with the optimal frequency can be selected automatically for playback via the signal processing unit 5.
- the regular operation is carried out via the control unit 10 at predetermined times interrupted, so that the antenna system 1 is then switched to a test mode for carrying out a self-test.
- the duration of the self-test is also specified via the control unit 10.
- the switch 11 is closed via the control unit 10.
- the control unit 10 inputs a control command into the combination device 3.
- the control command in the combination device 3 switches one of the antennas 2 to transmit mode.
- the antenna 2 operated in transmission mode is connected to the oscillator 7 of the first receiver 4 by the closed switch 11.
- the antenna 2 operated in transmission mode thus sends out test signals with a test frequency which is predetermined by the oscillator 7 of the first receiver 4.
- the antenna 2 operated in the transmission mode is expediently not one of the antennas 2 of the antenna system 1 which are used for the current reception of the radio signals.
- the control unit 10 also selects the antennas 2 to be checked during the self-test, which are preferably connected one after the other to the second receiver 4 'via the combination device 3.
- test signals emitted by the antenna 2 operated in the transmission mode are coupled to the antenna 2 to be tested and connected to the second receiver 4 '.
- the test signals received by this antenna 2 are evaluated in the second receiver 4 '.
- the frequency of the second receiver 4 ' is on the test frequency, which in the
- Oscillator 7 of the first receiver 4 is generated, tuned.
- the test frequency is 100 MHz
- the bandpass filter 8 'of the second receiver 4 is matched to this test frequency.
- the oscillator 7 'of the second receiver 4 C is tuned to the test frequency. In the present example, its frequency is 110.7 MHz, so that the intermediate frequency signal at the output of the mixer 6 'is 10.7 MHz, the downstream bandpass being tuned to this intermediate frequency.
- the test frequency i.e. the frequency of the oscillator 7 of the first receiver 4 can be tuned.
- the frequency of the oscillator 7 'of the second receiver 4' is changed accordingly.
- the arrangement thus formed for carrying out the self-test thus has a two-channel structure.
- the first receiver 4 with the antenna 2 operated in transmission mode forms a first channel
- the second receiver 4 ′ forms the second channel with the antenna 2 to be checked.
- test signals are coupled from the transmitting antenna into the antenna 2 to be checked.
- the received levels recorded with the level measuring device 12 form actual values which are compared in the control unit 10 with setpoints which are specified and stored there. Additionally or alternatively, received quality-evaluating signals obtained from the signal processing unit 5 from the output signals of the second receiver 4 'can be included as actual values in the
- Control unit 10 is read in and compared there again with suitable target values.
- the comparison of the actual values with the target values in the control unit 10 provides a measure of the quality of the signals which are received by the antenna 2 to be checked.
- the actual values are preferably compared with the target values based on tolerance bands specified in the control unit 10. Adequate error-free functioning of the antenna system 1 is present when the actual values match the target values within the respective tolerance bands.
- all antennas 2 required for receiving operation are preferably checked.
- the test frequency is changed within a predetermined frequency range during the self-test.
- the switch 11 is opened again and the antenna 2 operated during the self-test in the transmission mode is switched back to the reception mode.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Superheterodyne Receivers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20019677U | 2000-11-20 | ||
DE20019677U DE20019677U1 (de) | 2000-11-20 | 2000-11-20 | Antennensystem |
PCT/EP2001/000255 WO2002041537A1 (de) | 2000-11-20 | 2001-01-11 | Antennensystem |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1336264A1 true EP1336264A1 (de) | 2003-08-20 |
Family
ID=7949046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01900420A Withdrawn EP1336264A1 (de) | 2000-11-20 | 2001-01-11 | Antennensystem |
Country Status (5)
Country | Link |
---|---|
US (1) | US7084808B2 (de) |
EP (1) | EP1336264A1 (de) |
JP (1) | JP2004514373A (de) |
DE (1) | DE20019677U1 (de) |
WO (1) | WO2002041537A1 (de) |
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KR100792236B1 (ko) * | 2001-12-29 | 2008-01-07 | 엘지전자 주식회사 | 이미지 신호제거 수신기 |
KR100547747B1 (ko) * | 2003-10-28 | 2006-01-31 | 삼성전자주식회사 | 성능 자가 진단 기능을 가지는 이동통신 단말과 그의 진단방법 |
KR100635723B1 (ko) * | 2004-07-28 | 2006-10-17 | 주식회사 팬택 | 이동통신 단말기에서의 위성 방송 수신 다이버시티 제어장치 및 방법 |
US7880683B2 (en) * | 2004-08-18 | 2011-02-01 | Ruckus Wireless, Inc. | Antennas with polarization diversity |
US7193562B2 (en) * | 2004-11-22 | 2007-03-20 | Ruckus Wireless, Inc. | Circuit board having a peripheral antenna apparatus with selectable antenna elements |
US7933628B2 (en) | 2004-08-18 | 2011-04-26 | Ruckus Wireless, Inc. | Transmission and reception parameter control |
US7899497B2 (en) * | 2004-08-18 | 2011-03-01 | Ruckus Wireless, Inc. | System and method for transmission parameter control for an antenna apparatus with selectable elements |
US7292198B2 (en) * | 2004-08-18 | 2007-11-06 | Ruckus Wireless, Inc. | System and method for an omnidirectional planar antenna apparatus with selectable elements |
US7498996B2 (en) * | 2004-08-18 | 2009-03-03 | Ruckus Wireless, Inc. | Antennas with polarization diversity |
US7652632B2 (en) * | 2004-08-18 | 2010-01-26 | Ruckus Wireless, Inc. | Multiband omnidirectional planar antenna apparatus with selectable elements |
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US7965252B2 (en) * | 2004-08-18 | 2011-06-21 | Ruckus Wireless, Inc. | Dual polarization antenna array with increased wireless coverage |
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CN100423081C (zh) * | 2004-12-03 | 2008-10-01 | 深圳迈瑞生物医疗电子股份有限公司 | 硬件加速显示水平线段的装置及其方法 |
KR100587791B1 (ko) * | 2004-12-08 | 2006-06-09 | 한국항공우주연구원 | 중간주파수 조절을 위한 주파수 송수신 장치 |
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JP2007288257A (ja) * | 2006-04-12 | 2007-11-01 | Fujitsu Ten Ltd | 受信システム |
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JP4650359B2 (ja) * | 2006-07-06 | 2011-03-16 | 日産自動車株式会社 | 車両用アンテナの結線診断装置および車両用アンテナの結線診断方法 |
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US8355343B2 (en) | 2008-01-11 | 2013-01-15 | Ruckus Wireless, Inc. | Determining associations in a mesh network |
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US8698675B2 (en) | 2009-05-12 | 2014-04-15 | Ruckus Wireless, Inc. | Mountable antenna elements for dual band antenna |
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US9570799B2 (en) | 2012-09-07 | 2017-02-14 | Ruckus Wireless, Inc. | Multiband monopole antenna apparatus with ground plane aperture |
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US9154243B2 (en) * | 2012-12-17 | 2015-10-06 | Qualcomm Incorporated | Receiver calibration with LO signal from inactive receiver |
EP2974045A4 (de) | 2013-03-15 | 2016-11-09 | Ruckus Wireless Inc | Niedrigbandreflektor für eine gerichtete doppelbandantenne |
US9893715B2 (en) * | 2013-12-09 | 2018-02-13 | Shure Acquisition Holdings, Inc. | Adaptive self-tunable antenna system and method |
DE102014111966A1 (de) * | 2014-08-08 | 2016-02-11 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Universeller Reifendrucksensor |
US10361798B1 (en) | 2018-05-07 | 2019-07-23 | Motorola Solutions, Inc. | Radiofrequency component performance measurement using radiated spurious energy |
US11196449B2 (en) | 2018-08-08 | 2021-12-07 | Avx Antenna, Inc. | Methods for configuring a multi-mode antenna system for multi-channel communication systems |
WO2020033158A1 (en) | 2018-08-08 | 2020-02-13 | Avx Antenna, Inc. D/B/A Ethertronics, Inc. | Vhf-uhf antenna system with feedback |
DE102023001094B3 (de) | 2023-03-20 | 2024-08-14 | Mercedes-Benz Group AG | Diagnoseverfahren für ein Rundfunk-Empfangssystem und das Rundfunk-Empfangssystem |
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DE19618333A1 (de) * | 1996-05-07 | 1997-11-13 | Lindenmeier Heinz | Schaltungsanordnung zur Funktionsprüfung mobiler Rundfunkempfangsanlagen |
US5835850A (en) * | 1996-08-12 | 1998-11-10 | At&T Corp | Self-testing transceiver |
SE519473C2 (sv) | 1998-10-06 | 2003-03-04 | Ericsson Telefon Ab L M | Förfarande och arrangemang för att testa mottagningsantenner i radiobasstationer |
ATE323978T1 (de) * | 2001-03-02 | 2006-05-15 | Fuba Automotive Gmbh | Diversity-anlage zum empfang digitaler terrestrischer und/oder satelliten-funksignale für fahrzeuge |
EP1309103A1 (de) * | 2001-10-31 | 2003-05-07 | Nokia Corporation | Antennensystem zum Funkbetrieb für GSM/WLAN |
-
2000
- 2000-11-20 DE DE20019677U patent/DE20019677U1/de not_active Expired - Lifetime
-
2001
- 2001-01-11 US US10/416,959 patent/US7084808B2/en not_active Expired - Fee Related
- 2001-01-11 JP JP2002543826A patent/JP2004514373A/ja active Pending
- 2001-01-11 EP EP01900420A patent/EP1336264A1/de not_active Withdrawn
- 2001-01-11 WO PCT/EP2001/000255 patent/WO2002041537A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO0241537A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE20019677U1 (de) | 2001-02-15 |
US20040058690A1 (en) | 2004-03-25 |
US7084808B2 (en) | 2006-08-01 |
WO2002041537A1 (de) | 2002-05-23 |
JP2004514373A (ja) | 2004-05-13 |
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