DK0896429T3 - Method for measuring and correcting the frequency of a receiver oscillator - Google Patents

Method for measuring and correcting the frequency of a receiver oscillator

Info

Publication number
DK0896429T3
DK0896429T3 DK98109934T DK98109934T DK0896429T3 DK 0896429 T3 DK0896429 T3 DK 0896429T3 DK 98109934 T DK98109934 T DK 98109934T DK 98109934 T DK98109934 T DK 98109934T DK 0896429 T3 DK0896429 T3 DK 0896429T3
Authority
DK
Denmark
Prior art keywords
frequency
receiver oscillator
correcting
oscillator
signals
Prior art date
Application number
DK98109934T
Other languages
Danish (da)
Inventor
Andreas Schaefer
Dietmar Prof Dr-Ing Rudolph
Christian Hoerlle
Original Assignee
Deutsche Telekom Ag
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 Deutsche Telekom Ag filed Critical Deutsche Telekom Ag
Application granted granted Critical
Publication of DK0896429T3 publication Critical patent/DK0896429T3/en

Links

Classifications

    • 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
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant

Landscapes

  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The method involves measuring and correcting a frequency of a receiver oscillator, whereby digital data to be transferred are high-frequency modulated on a carrier signal. The data are transferred as usage signals (D), alternating with low-frequency modulated test signals (T), and a frequency difference between a nominal frequency of a transmitter oscillator and an actual frequency of a receiver oscillator is determined at the reception of the digital signals in response to the test signals. A control signal for the adjustment of the receiver oscillator on the nominal frequency is derived from the determined frequency difference. The frequency difference is preferably equalized in multiple stages, whereby the individual stages build onto each other.
DK98109934T 1997-08-07 1998-05-30 Method for measuring and correcting the frequency of a receiver oscillator DK0896429T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19734197A DE19734197C1 (en) 1997-08-07 1997-08-07 Method for measuring and correcting the frequency of a receiver oscillator

Publications (1)

Publication Number Publication Date
DK0896429T3 true DK0896429T3 (en) 2005-12-19

Family

ID=7838261

Family Applications (1)

Application Number Title Priority Date Filing Date
DK98109934T DK0896429T3 (en) 1997-08-07 1998-05-30 Method for measuring and correcting the frequency of a receiver oscillator

Country Status (5)

Country Link
EP (1) EP0896429B1 (en)
AT (1) ATE301883T1 (en)
DE (2) DE19734197C1 (en)
DK (1) DK0896429T3 (en)
ES (1) ES2247647T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0949758B1 (en) * 1998-04-01 2004-06-09 Motorola Semiconducteurs S.A. Communications system, mobile device and method
DE19918373A1 (en) * 1999-04-22 2000-11-02 Siemens Ag Correction of frequency errors in subscriber stations
DE10336092A1 (en) * 2003-08-06 2005-03-03 Rohde & Schwarz Gmbh & Co. Kg Method and device for estimating the frequency and / or the phase of a digital signal sequence
US7495446B2 (en) 2005-08-23 2009-02-24 Schlumberger Technology Corporation Formation evaluation system and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1605346A (en) * 1962-03-30 1992-10-21 Marconi Co Ltd Improvements in or relating to signal communication systems
FR2418584A1 (en) * 1978-02-28 1979-09-21 Ibm France PROCESS AND DEVICE FOR ACQUIRING THE INITIAL CLOCK PHASE IN A SYNCHRONOUS DATA RECEIVER
US4599732A (en) * 1984-04-17 1986-07-08 Harris Corporation Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format
IT1236978B (en) * 1989-12-22 1993-05-12 Italtel Spa METHOD AND DEVICE FOR SYNCHRONIZATION BETWEEN A FIXED RADIO STATION AND A MOBILE STATION IN A DIGITAL RADIO MOBILE SYSTEM
JP3041175B2 (en) * 1993-11-12 2000-05-15 株式会社東芝 OFDM synchronous demodulation circuit

Also Published As

Publication number Publication date
EP0896429A1 (en) 1999-02-10
DE59812984D1 (en) 2005-09-15
ES2247647T3 (en) 2006-03-01
EP0896429B1 (en) 2005-08-10
DE19734197C1 (en) 1999-01-21
ATE301883T1 (en) 2005-08-15

Similar Documents

Publication Publication Date Title
DK0381636T3 (en) Method for quickly adjusting the frequency of a coherent radio receiver and apparatus for practicing the method
EP0722235A3 (en) Method and transmitting orthogonal frequency division multiplexed (OFDM) signals and receiver thereof
CA2095025A1 (en) Channel equalisation in particular for fading channels
MX9605977A (en) High speed transport system.
AR014207A1 (en) METHOD FOR RECEIVING RADIO FREQUENCY (RF) SIGNS IN A RECEIVER
EP0529421A3 (en) Method and apparatus for measuring carrier frequency offset in a multichannel communications system
AU9126298A (en) Method and apparatus for generating a line impairment learning signal for a datacommunication system
FI922802A0 (en) FOERFARANDE FOER OEVERFOERING AV DIGITALA INFORMATIONER, SAERSKILT LJUDINFORMATION I EN TV-KANAL.
US6882944B2 (en) Threshold setting apparatus for adjustably setting a threshold for use in identifying serial data from a baseband signal
DE69422882D1 (en) Control devices for digital radio receivers
FI980219A (en) Communication method and radio system
ATE225102T1 (en) METHOD FOR CORRECTING PHASE AND AMPLITUDE ERRORS IN COFDM SIGNALS
DK0896429T3 (en) Method for measuring and correcting the frequency of a receiver oscillator
ATE202879T1 (en) METHOD FOR TRANSPARENTLY TRANSMITTING AN INCOMING CLOCK SIGNAL OVER A NETWORK, AND RELATED CIRCUITS FOR RECEIVING AND TRANSMITTING
NO971542D0 (en) Automatic tuning of a radio transmitter / receiver
MXPA04004977A (en) Method and apparatus for pulse overlap pre-compensation in digitally modulated signals.
CA1301251C (en) Bit synchronisation for optical networks
MY113638A (en) An apparatus, method and article of manufacture for carrier frequency compensation in a fm radio
DE69113624D1 (en) RADIO TEST LOOP FOR RADIO TRANSMITTERS / RECEIVERS.
US6178208B1 (en) System for recovery of digital data from amplitude and phase modulated line signals using delay lines
CA2254807A1 (en) Method and system for synchronizing time-division-duplexed transceivers
WO2002063617A1 (en) Correction method, correction circuit and optical data recorder
NO20020839L (en) Method of adjusting frequency shift in a base station receiver in a data transmission system
MY128456A (en) Communications systems
WO2007067379A3 (en) Control for communication systems transmitting and receiving signals with substantially no sidebands