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WO2000064052A1 - Procede et systeme pour syntoniser des modules de resonance - Google Patents

Procede et systeme pour syntoniser des modules de resonance Download PDF

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Publication number
WO2000064052A1
WO2000064052A1 PCT/SE2000/000716 SE0000716W WO0064052A1 WO 2000064052 A1 WO2000064052 A1 WO 2000064052A1 SE 0000716 W SE0000716 W SE 0000716W WO 0064052 A1 WO0064052 A1 WO 0064052A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
tuning
primary
signals
resonance
Prior art date
Application number
PCT/SE2000/000716
Other languages
English (en)
Inventor
Björn Johansson
Lennart Larsson
Rolf Folkesson
Fredrik Oskarsson
Original Assignee
Allgon Ab
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 Allgon Ab filed Critical Allgon Ab
Priority to AU44449/00A priority Critical patent/AU4444900A/en
Priority to EP00925818A priority patent/EP1171952A1/fr
Publication of WO2000064052A1 publication Critical patent/WO2000064052A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/16—Automatic frequency control where the frequency control is accomplished by mechanical means, e.g. by a motor

Definitions

  • the present invention relates to a method and a system for tuning in a fed-back tuning loop a plurality of resonance modules in for instance a radio base station, each resonance module having tuning means, a transmitter connection, and an antenna connection.
  • That resonance module in the afore-mentioned documents includes a resonant cavity and a resonance body, the position of which is adjustable by means of a motor to control the resonance frequency of the resonance module. As long as there is a phase difference between high-frequency input and output signals of the resonance module, the arrangement adjusts the position of the resonance body so as to reduce that phase difference.
  • One of these prior art arrangements includes a voltage controlled oscillator that generates a high-frequency signal which is mixed with the input signal and the output signal in first and second mixers, respectively.
  • a voltage controlled oscillator that generates a high-frequency signal which is mixed with the input signal and the output signal in first and second mixers, respectively.
  • two low-frequency signals are formed, the phase difference of which is a measure of a mistuning of the resonance module.
  • the resonance module is tuned by means of the motor to a correct resonance frequency being the frequency of the input signal of the resonance module.
  • One object of the present invention is to provide a method of for tuning resonance module, which method eliminates the problems with RF components, for instance, aging, drift and tolerances. Further objects of the invention are to provide an efficient and accurate method wherein plural resonance modules can be tuned in a sequential process or in a parallel process, wherein multiplexing can be used to reduce required circuitry and get a general hardware platform easy to configure for different frequency bands and access methods, and to provide an efficient and cost- effective system for tuning resonance modules, in particular, for carrying out the method according to the invention.
  • Analogue high-frequency input and output signals on the transmitter and antenna connection are sensed and directly converted to digital form for processing in a digital signal processor.
  • a tuning vector is determined for each resonance module based on two such digitally converted signals.
  • a corresponding one of the tuning vectors is applied to each tuning means. The procedure is repeated continously and for each resonance module to provide a fed- back control loop.
  • the inventive method and system are applicable to any type of resonance modules including, but not limited to, cavity resonators, half-wave or quarter-wave resonators, and waveguide resonators.
  • inventive method and system can either compare two or more signals sensed at different positions, e.g., sensed original (SI), internal (S2), reflected (S3), and antenna (S4) signals, and/or one or more of these signals sensed at different points in time at different postions of the resonator tuning means .
  • SI sensed original
  • S2 internal
  • S3 reflected
  • S4 antenna
  • Fig. 1 shows a block diagram of a resonance module tuning system including a plurality of possible sensing positions connected via a possible multiplexor to A/D converter means and a digital signal processor for controlling the tuning means of the resonance module,
  • Fig. 2 shows a first embodiment of the tuning system of fig. 1 including a multiplexor and a common A/D converter.
  • Fig. 3 shows a second embodiment of the tuning system of fig. 1 including separate A/D converters.
  • a single signal link is shown which is intended for a ulti signal combiner unit (cf. PCT/SE97/01125) intended for a base station in, e.g., a PCS mobile telephone system.
  • the combiner unit could include four tunable resonance modules each arranged to be connected at one side to an output of a respective transmitter via a respective isolator and at the other side to a common transmitting antenna via a phasing network.
  • the improved sub-system of fig. 1 for tuning a first resonance module 1 comprises a tunable resonator 2 having tuning means 3, a transmitter connection 4, and an antenna connection 5.
  • the system further comprises an isolator 6, which includes two circulator elements and a sensor P3 for sensing a transmitter signal Tl from a transmitter (not shown) , passing the isolator 6, to the transmitter connection 4 of the resonance module 1.
  • the sensor P3 in the isolator 6 produces an input signal S3 that is essentially a small fraction of the transmitter signal Tl.
  • the input signal S3 is fed via a first multiplexer (MUX1) 7, the operating sequence of which is to be described further below, to a sampler and analog-to-digital-converter (ADC) 8, which feeds the signal in digital form to a digital signal prosessor (DSP) 9.
  • the DSP 9 processes the digital signal and calculates a tuning vector based thereon containing information on distance and direction for movement of the tuning means 3.
  • the DSP 9 sends a control signal Cl to the tuning means to obtain an intended tuning position, i.e., an intended resonance frequency of the resonance module 1. Additionally to the tuning vector the DSP 9 may assign a tuning speed and acceleration for actuation of the tuning means 3.
  • the sub-system can include a further sensor P2 arranged inside the resonator 2 for sensing an antenna signal Al or a quantity indicative thereof.
  • This sensed signal S2 is fed via the MUX1 7 and the ADC 8 to the DSP 9 to be compared to signal S3 in order to determine a relative phase difference.
  • That phase difference is a measure of a relative difference between a frequency of the transmitter signal Tl and the frequency to which the resonance module is presently tuned.
  • Signal S2 is essentially a small fraction of the antenna signal Al .
  • the output signal could be sensed by sensor P4 on the antenna connection 5 to produce a signal S4 to be used instead of signal S2. In that case, however, signals originating from other transmitters (none shown) could be more of a problem. In ideal tuning of the resonance module, the phase difference between the transmitter signal Tl on the transmitter connection 4 and the antenna signal Al on the antenna connection 5 would be zero (when compensation for signal travel is taken into account) .
  • the real time difference between the measurements is known and determined by the DSP.
  • the sequence of connecting signals (SI - S4) by the MUXl 7 is not critical to the measurement principles.
  • fig. 2 the main embodiment indicated in fig. 1 is shown in somewhat greater detail.
  • the primary signal SI derived from the transmitter signal Tl and the secondary signal S2 derived from the antenna signal Al are fed to MUXl 7 and are converted to digital form one at a time in the ADC 8 as the DSP 9 controls the operation of the MUXl 7.
  • the DSP 9 controls the operation of the MUXl 7.
  • phase delay to compensate for is then proportional to the swiching cycle in the multiplexing.
  • the modulation phase change in the signal should be predicted in order to compensate for it. This is performed by a conventional predictor method using primarily sample values of SI, but possibly also feed-back of sample values of S2. The total phase delay to compensate for is then proportional to the the swiching cycle in the multiplexing and the modulation phase change together.
  • Signal SI can be filtered by the same or a similar filter in order to alter SI in the same manner as signal S2 is altered in the filtering. This eliminates any unwanted filter influence when comparing SI and S2.
  • the filter function of the resonator module can now be changed to according to tuning vector proportional to the relative phase of SI and S2.
  • the tuning means is actuated via a control output of the DSP.
  • an electrical stepping motor controlled by a signal Cl from the DSP 9, performs adjustment of a first resonance module by moving via a mechanical link a tuning element in the resonator of the resonance module.
  • the motor itself may set a limit to the speed of adjustment of the resonance module.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmitters (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Selective Calling Equipment (AREA)

Abstract

L'invention concerne un procédé et un système permettant de déterminer la réponse du signal d'une pluralité de modules de résonance pouvant être syntonisés, et de détecter au moins un premier signal analogue primaire dans un des signaux émis. Le procédé de cette invention consiste tout d'abord à opérer une conversion analogique-numérique d'un premier signal analogique primaire pour former un premier signal numérique, puis à effectuer des opérations discrètes dans le temps sur le premier signal numérique primaire ainsi obtenu, afin de définir une première quantité de signaux primaires. Ce procédé consiste ensuite à comparer ces quantités de signaux détectées pour calculer un écart, à comparer cet écart à ladite réponse du signal pour déterminer un vecteur de syntonisation, et à enclencher l'organe de syntonisation du premier module de résonance, selon ce vecteur de syntonisation, pour connaître la résonance produite par ce module dans le premier signal émis. Enfin, le procédé de cette invention consiste à répéter cette opération pour chaque module de manière à obtenir une syntonisation en retour.
PCT/SE2000/000716 1999-04-16 2000-04-14 Procede et systeme pour syntoniser des modules de resonance WO2000064052A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU44449/00A AU4444900A (en) 1999-04-16 2000-04-14 Method and system for tuning resonance modules
EP00925818A EP1171952A1 (fr) 1999-04-16 2000-04-14 Procede et systeme pour syntoniser des modules de resonance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9901372-4 1999-04-16
SE9901372A SE9901372D0 (sv) 1999-04-16 1999-04-16 Method and system for tuning resonance modules

Publications (1)

Publication Number Publication Date
WO2000064052A1 true WO2000064052A1 (fr) 2000-10-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/000716 WO2000064052A1 (fr) 1999-04-16 2000-04-14 Procede et systeme pour syntoniser des modules de resonance

Country Status (5)

Country Link
EP (1) EP1171952A1 (fr)
CN (1) CN1346541A (fr)
AU (1) AU4444900A (fr)
SE (1) SE9901372D0 (fr)
WO (1) WO2000064052A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049213A1 (fr) * 2000-12-15 2002-06-20 Allgon Ab Procede de syntonisation d'un filtre haute frequence, filtre haute frequence et systeme comprenant un tel filtre haute frequence
EP1933460A1 (fr) * 2006-12-13 2008-06-18 Matsushita Electric Industrial Co., Ltd. Dispositif analogique à radiofréquence pour les télécommunications sans fil
WO2011150952A1 (fr) * 2010-05-31 2011-12-08 Prism Microwave Oy Système de syntonisation de filtres de résonateur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080221753A1 (en) * 2005-01-14 2008-09-11 Koninklijke Philips Electronics, N.V. Method For Selecting Audio Content To Be Played In A Vehicle
CN101194423B (zh) * 2005-06-09 2010-05-12 艾利森电话股份有限公司 可调谐电路装置以及提供该电路装置的方法
CN101420274B (zh) * 2008-12-04 2012-05-30 中国人民解放军海军工程大学 免加电的长波发射机调机方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726071A (en) * 1984-12-31 1988-02-16 Orion Industries, Inc. Microprocessor controlled self-tuning resonant cavity and method
WO1998001949A1 (fr) * 1996-07-10 1998-01-15 Allgon Ab Procede et systeme pour accorder des modules de resonance

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726071A (en) * 1984-12-31 1988-02-16 Orion Industries, Inc. Microprocessor controlled self-tuning resonant cavity and method
WO1998001949A1 (fr) * 1996-07-10 1998-01-15 Allgon Ab Procede et systeme pour accorder des modules de resonance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AL-ALI ET AL.: "Selftuning resonant circuit using a microprocessor based system", IEEE PROCEEDINGS OF SOUTHEASTCON, vol. 1, 7 April 1991 (1991-04-07) - 10 April 1991 (1991-04-10), pages 138 - 141, XP010044956 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049213A1 (fr) * 2000-12-15 2002-06-20 Allgon Ab Procede de syntonisation d'un filtre haute frequence, filtre haute frequence et systeme comprenant un tel filtre haute frequence
US6987427B2 (en) 2000-12-15 2006-01-17 Allgon Ab Method for tuning a radio filter, a radio filter and a system comprising such a radio filter
US7023293B2 (en) 2000-12-15 2006-04-04 Allgon Ab Method for tuning a radio filter, a radio filter and a system comprising such a radio filter
EP1933460A1 (fr) * 2006-12-13 2008-06-18 Matsushita Electric Industrial Co., Ltd. Dispositif analogique à radiofréquence pour les télécommunications sans fil
WO2011150952A1 (fr) * 2010-05-31 2011-12-08 Prism Microwave Oy Système de syntonisation de filtres de résonateur

Also Published As

Publication number Publication date
EP1171952A1 (fr) 2002-01-16
CN1346541A (zh) 2002-04-24
SE9901372D0 (sv) 1999-04-16
AU4444900A (en) 2000-11-02

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