FI105629B - Förfarande för estimering av frekvensfel - Google Patents
Förfarande för estimering av frekvensfel Download PDFInfo
- Publication number
- FI105629B FI105629B FI974598A FI974598A FI105629B FI 105629 B FI105629 B FI 105629B FI 974598 A FI974598 A FI 974598A FI 974598 A FI974598 A FI 974598A FI 105629 B FI105629 B FI 105629B
- Authority
- FI
- Finland
- Prior art keywords
- frequency error
- frequency
- symbol
- received signal
- sample point
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 21
- 238000005070 sampling Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000010295 mobile communication Methods 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/091—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector using a sampling device
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0044—Control loops for carrier regulation
- H04L2027/0063—Elements of loops
- H04L2027/0065—Frequency error detectors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Claims (4)
1. Förfarande för estimering av ett frekvensfel i ett kommunikations-system, i synnerhet ett mobiltelefonsystem, i vilket förfarande successiva sampelmängder tas frän en signal som skall mottas i vissa punkter som mot- 5 svarar symbolperiodpunkter för en mottagare, och frekvensfelestimat för varje sampelpunkt fastställs pä basis av sampelmängder som tagits i sampelpunk-ten ifräga, kännetecknat av att frekvensfelestimatens varians beräknas för varje sampelpunkt och 10 frekvensfelestimatet för signalen som skall mottas fastställs pä .ba sis av den sampelpunkts frekvensfelestimat som har den minsta variansen.
2. Förfarande enligt patentkrav 1, k ä n n e t e c k n a t av att som frekvensfelestimat för signalen som skall mottas väljs medelvärdet av fre-kvensfelestimaten som fastställts fran sampelmängderna av den sampelpunkt 15 som har den minsta variansen.
3. Förfarande enligt patentkrav 2, k ä n n e t e c k n a t av att det finns företrädesvis tre stycken sampelpunkter per symbolperiod.
4. Förfarande enligt patentkrav 3, kä n n e te c k n a t av att det finns företrädesvis tre stycken sampelmängder per sampelpunkt. * · «
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI974598A FI105629B (sv) | 1997-12-22 | 1997-12-22 | Förfarande för estimering av frekvensfel |
DE69831097T DE69831097T2 (de) | 1997-12-22 | 1998-12-21 | Verfahren zur abschätzung des frequenzfehlers |
EP98962448A EP1042876B1 (en) | 1997-12-22 | 1998-12-21 | Method for frequency error estimation |
AU17615/99A AU1761599A (en) | 1997-12-22 | 1998-12-21 | Method for frequency error estimation |
PCT/FI1998/001008 WO1999033217A2 (en) | 1997-12-22 | 1998-12-21 | Method for frequency error estimation |
US09/582,168 US6771718B1 (en) | 1997-12-22 | 1998-12-21 | Method for frequency error estimation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI974598A FI105629B (sv) | 1997-12-22 | 1997-12-22 | Förfarande för estimering av frekvensfel |
FI974598 | 1997-12-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
FI974598A0 FI974598A0 (fi) | 1997-12-22 |
FI974598A FI974598A (sv) | 1999-06-23 |
FI105629B true FI105629B (sv) | 2000-09-15 |
Family
ID=8550197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI974598A FI105629B (sv) | 1997-12-22 | 1997-12-22 | Förfarande för estimering av frekvensfel |
Country Status (6)
Country | Link |
---|---|
US (1) | US6771718B1 (sv) |
EP (1) | EP1042876B1 (sv) |
AU (1) | AU1761599A (sv) |
DE (1) | DE69831097T2 (sv) |
FI (1) | FI105629B (sv) |
WO (1) | WO1999033217A2 (sv) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2363253C (en) * | 2000-11-07 | 2007-01-09 | Research In Motion Limited | Communication channel detector and channel detection method |
US7269394B2 (en) * | 2002-10-02 | 2007-09-11 | Agere Systems Inc. | Frequency offset compensation for communication systems |
DE102004023889A1 (de) * | 2004-05-12 | 2005-12-08 | Micronas Gmbh | Verfahren und Schaltungsanordnung zum Bestimmen der Frequenz eines empfangenen Signals zum Demodulieren von empfangenen Symbolen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5883921A (en) | 1995-07-31 | 1999-03-16 | Harris Corporation | Short burst acquisition circuit and method for direct sequence spread spectrum links |
FI102338B1 (sv) | 1996-05-21 | 1998-11-13 | Nokia Mobile Phones Ltd | Mottagarens självsynkronisering i tomgångskondition |
US6032033A (en) * | 1996-12-03 | 2000-02-29 | Nortel Networks Corporation | Preamble based selection diversity in a time division multiple access radio system using digital demodulation |
IL120210A (en) * | 1997-02-13 | 1999-12-31 | Dspc Tech Ltd | Synchronization system and method for digital communication systems |
US6104767A (en) * | 1997-11-17 | 2000-08-15 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for estimating a frequency offset |
-
1997
- 1997-12-22 FI FI974598A patent/FI105629B/sv active
-
1998
- 1998-12-21 WO PCT/FI1998/001008 patent/WO1999033217A2/en active IP Right Grant
- 1998-12-21 EP EP98962448A patent/EP1042876B1/en not_active Expired - Lifetime
- 1998-12-21 US US09/582,168 patent/US6771718B1/en not_active Expired - Fee Related
- 1998-12-21 DE DE69831097T patent/DE69831097T2/de not_active Expired - Lifetime
- 1998-12-21 AU AU17615/99A patent/AU1761599A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
FI974598A (sv) | 1999-06-23 |
EP1042876A2 (en) | 2000-10-11 |
AU1761599A (en) | 1999-07-12 |
DE69831097D1 (de) | 2005-09-08 |
FI974598A0 (fi) | 1997-12-22 |
US6771718B1 (en) | 2004-08-03 |
DE69831097T2 (de) | 2006-04-06 |
WO1999033217A2 (en) | 1999-07-01 |
WO1999033217A3 (en) | 1999-09-10 |
EP1042876B1 (en) | 2005-08-03 |
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