FI97662B - Förfarande för bärvågsåtervinning - Google Patents
Förfarande för bärvågsåtervinning Download PDFInfo
- Publication number
- FI97662B FI97662B FI892789A FI892789A FI97662B FI 97662 B FI97662 B FI 97662B FI 892789 A FI892789 A FI 892789A FI 892789 A FI892789 A FI 892789A FI 97662 B FI97662 B FI 97662B
- Authority
- FI
- Finland
- Prior art keywords
- frequency
- voltage
- modulation
- input
- controlled oscillator
- Prior art date
Links
Classifications
-
- 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
- H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
- H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
- H04L27/2272—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals using phase locked loops
-
- 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
- H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
- H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
- H04L27/2276—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using frequency multiplication or harmonic tracking
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Cephalosporin Compounds (AREA)
- Mobile Radio Communication Systems (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Gyroscopes (AREA)
Claims (3)
1. Förfarande för synkroniseringsäterställning i samband med koherent eller skenkoherent demodulering av 5 digitalt överförd data, kännetecknat av att i den mottagna signalfrekvensen (fc *) bildas, genora modulering med en signalfrekvens (n * fc) , en frekvens (n + 1) fc, varvid n är ett heltal som är större än 1, att den ge-nom modulering erhällna frekvensen (n + 1) fc förs som en 10 referensfrekvens tili en PLL-krets, vars spänningsstyrda oscillator (30) har en frekvens (n + 1) fc och att av os-cillatorfrekvensen erhälls, genom frekvensdelning med di-visorn (n + 1), en signalfrekvens (fc) som är i stort sett utan fasförskjutning. 15
2. Förfarande enligt patentkrav 1, känne tecknat av att den signalfrekvens (fc' ) som motta-gits frän den i samband med MPSK-metoden överförda datan före moduleringen dessutom multipliceras med faktorn (m), varvid m är ett heltal som är större än 1 och att den an-20 dra frekvensdelningen sker med frekvensdel-ningens divisor (n + 1), med en divisor (m) som motsvarar faktorn (m).
3. Anordning för utförande av förfarandet enligt patentkrav 2, kännetecknad av att bäda frek-vensdelarna (31, 39) har kombinerats tili en enda frek-25 vensdelare med delningsförhällandet m (n + 1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3819380 | 1988-06-07 | ||
| DE3819380A DE3819380C2 (de) | 1988-06-07 | 1988-06-07 | Verfahren zur Trägerrückgewinnung |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI892789A0 FI892789A0 (sv) | 1989-06-07 |
| FI892789A FI892789A (sv) | 1989-12-08 |
| FI97662B true FI97662B (sv) | 1996-10-15 |
| FI97662C FI97662C (sv) | 1997-01-27 |
Family
ID=6356052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI892789A FI97662C (sv) | 1988-06-07 | 1989-06-07 | Förfarande för bärvågsåtervinning |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0345515B1 (sv) |
| AT (1) | ATE126639T1 (sv) |
| DE (2) | DE3819380C2 (sv) |
| DK (1) | DK275289A (sv) |
| FI (1) | FI97662C (sv) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4125995A1 (de) * | 1991-06-08 | 1992-12-10 | Licentia Gmbh | Empfaengeranordnung |
| DE4128713A1 (de) * | 1991-08-29 | 1993-03-04 | Daimler Benz Ag | Verfahren und anordnung zur messung der traegerfrequenzablage in einem mehrkanaluebertragungssystem |
| US5450456A (en) * | 1993-11-12 | 1995-09-12 | Daimler Benz Ag | Method and arrangement for measuring the carrier frequency deviation in a multi-channel transmission system |
| JP2848328B2 (ja) * | 1996-04-08 | 1999-01-20 | 日本電気株式会社 | 位相変調信号復調方法およびその方法を実施するための装置 |
| DE19740957C2 (de) * | 1997-09-17 | 1999-08-19 | Fraunhofer Ges Forschung | Vorrichtung und Verfahren zur Takt- und Trägerrückgewinnung |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61177054A (ja) * | 1985-01-31 | 1986-08-08 | Alps Electric Co Ltd | 位相変調信号の受信回路 |
-
1988
- 1988-06-07 DE DE3819380A patent/DE3819380C2/de not_active Expired - Fee Related
-
1989
- 1989-05-20 AT AT89109128T patent/ATE126639T1/de not_active IP Right Cessation
- 1989-05-20 DE DE58909385T patent/DE58909385D1/de not_active Expired - Fee Related
- 1989-05-20 EP EP89109128A patent/EP0345515B1/de not_active Expired - Lifetime
- 1989-06-06 DK DK275289A patent/DK275289A/da not_active Application Discontinuation
- 1989-06-07 FI FI892789A patent/FI97662C/sv not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK275289D0 (da) | 1989-06-06 |
| EP0345515B1 (de) | 1995-08-16 |
| FI97662C (sv) | 1997-01-27 |
| FI892789A0 (sv) | 1989-06-07 |
| DK275289A (da) | 1989-12-08 |
| EP0345515A2 (de) | 1989-12-13 |
| ATE126639T1 (de) | 1995-09-15 |
| DE3819380A1 (de) | 1989-12-14 |
| DE58909385D1 (de) | 1995-09-21 |
| EP0345515A3 (de) | 1991-01-09 |
| DE3819380C2 (de) | 1997-10-09 |
| FI892789A (sv) | 1989-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Owner name: ROBERT BOSCH GMBH |
|
| BB | Publication of examined application | ||
| MM | Patent lapsed |
Owner name: SIEMENS AKTIENGESELLSCHAFT |