FI97760B - GMSK-modulator - Google Patents
GMSK-modulator Download PDFInfo
- Publication number
- FI97760B FI97760B FI901192A FI901192A FI97760B FI 97760 B FI97760 B FI 97760B FI 901192 A FI901192 A FI 901192A FI 901192 A FI901192 A FI 901192A FI 97760 B FI97760 B FI 97760B
- Authority
- FI
- Finland
- Prior art keywords
- modulator
- frequency
- gmsk
- input
- bit
- 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
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
- H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
- H04L27/2017—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Storage Of Fruits Or Vegetables (AREA)
Claims (3)
1. Anordning för modulering av en digital information enligt GMSK-förfaringssättet (Gaussian Minimum Shift Keying), som genom lämplig preparering (förkodning) upp-visar ett förhällande liknande en modulator för enkelt ,« · ·β ί im n I U i 5 97760 sidband, kännetecknad av att i ingängsbitströmmen tili modulatorn en för sidbandomvändning anordnad XOR-grind (4) är inkopplad, som inverterar varannan bit, varvid grindens utgäng är ansluten tili ett med sinä uttag med ett PROM's (6) adressanslutningar (A3-A,) förbundet skiftregister (5) , att i PROM (6) en puissvarsfunktion för modulatorna vad avser en mellanfrekvens är lagrad och att mellanfrekvensen för det alstrade enkelsidbandspektrumet (modulatorutfrekvensen) är sä vald, att sambandet f(ZF) - ft/4 + n · ft/2 för nai är tillräckligt, vid vilket systemet uppvisar ett entydigt definierat pulssvar, varvid ft är taktfrekvensen.
2. Anordning enligt patentkrav 1, kännetecknad av en av en multipel av taktfrekvensen matad m-bit-räknare (7) för ästadkommande av bit-mellanvärden, varvid räknaren (7) är ansluten till XOR-grindens (4) andra ingäng.
3. Anordning enligt patentkrav 1 eller 2, kännetecknad av att modulatorn är realiserad med hjälp av ett transver-salfilter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP89104193 | 1989-03-09 | ||
| EP89104193 | 1989-03-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI901192A0 FI901192A0 (sv) | 1990-03-08 |
| FI97760B true FI97760B (sv) | 1996-10-31 |
| FI97760C FI97760C (sv) | 1997-02-10 |
Family
ID=8201072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI901192A FI97760C (sv) | 1989-03-09 | 1990-03-08 | GMSK-modulator |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0386412B1 (sv) |
| AT (1) | ATE104492T1 (sv) |
| DE (1) | DE59005305D1 (sv) |
| DK (1) | DK0386412T3 (sv) |
| ES (1) | ES2051391T3 (sv) |
| FI (1) | FI97760C (sv) |
| IE (1) | IE65459B1 (sv) |
| NO (1) | NO901037L (sv) |
| PT (1) | PT93368B (sv) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969590A (en) * | 1975-04-04 | 1976-07-13 | Rockwell International Corporation | Surface acoustic wave apparatus |
| US4648099A (en) * | 1984-12-17 | 1987-03-03 | Allied Corporation | Digital minimum shift keyed modulator |
-
1990
- 1990-01-15 AT AT90100758T patent/ATE104492T1/de not_active IP Right Cessation
- 1990-01-15 DK DK90100758.3T patent/DK0386412T3/da active
- 1990-01-15 EP EP90100758A patent/EP0386412B1/de not_active Expired - Lifetime
- 1990-01-15 DE DE59005305T patent/DE59005305D1/de not_active Expired - Fee Related
- 1990-01-15 ES ES90100758T patent/ES2051391T3/es not_active Expired - Lifetime
- 1990-03-05 NO NO90901037A patent/NO901037L/no unknown
- 1990-03-08 PT PT93368A patent/PT93368B/pt not_active IP Right Cessation
- 1990-03-08 IE IE83290A patent/IE65459B1/en not_active IP Right Cessation
- 1990-03-08 FI FI901192A patent/FI97760C/sv not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| PT93368A (pt) | 1990-11-07 |
| ATE104492T1 (de) | 1994-04-15 |
| NO901037L (no) | 1990-09-10 |
| FI901192A0 (sv) | 1990-03-08 |
| DK0386412T3 (da) | 1994-06-20 |
| DE59005305D1 (de) | 1994-05-19 |
| IE65459B1 (en) | 1995-11-01 |
| IE900832L (en) | 1990-09-09 |
| NO901037D0 (no) | 1990-03-05 |
| ES2051391T3 (es) | 1994-06-16 |
| FI97760C (sv) | 1997-02-10 |
| PT93368B (pt) | 1996-05-31 |
| EP0386412B1 (de) | 1994-04-13 |
| EP0386412A1 (de) | 1990-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Owner name: SIEMENS AKTIENGESELLSCHAFT |
|
| BB | Publication of examined application | ||
| MM | Patent lapsed | ||
| MM | Patent lapsed |
Owner name: SIEMENS AKTIENGESELLSCHAFT |