JPH0243388B2 - - Google Patents
Info
- Publication number
- JPH0243388B2 JPH0243388B2 JP63152451A JP15245188A JPH0243388B2 JP H0243388 B2 JPH0243388 B2 JP H0243388B2 JP 63152451 A JP63152451 A JP 63152451A JP 15245188 A JP15245188 A JP 15245188A JP H0243388 B2 JPH0243388 B2 JP H0243388B2
- Authority
- JP
- Japan
- Prior art keywords
- resonator
- tuning
- angle
- code
- voltage
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
-
- 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
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
- H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
- H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Circuits Of Receivers In General (AREA)
- Amplifiers (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8024802A FR2494938A1 (fr) | 1980-11-21 | 1980-11-21 | Procede de transmission des signaux d'exploitation d'un faisceau hertzien numerique, emetteur et recepteur pour la mise en oeuvre d'un tel procede |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6446353A JPS6446353A (en) | 1989-02-20 |
| JPH0243388B2 true JPH0243388B2 (en]) | 1990-09-28 |
Family
ID=9248249
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56185596A Pending JPS57112160A (en) | 1980-11-21 | 1981-11-20 | Transmitter and receiver for processing for transmitting service signal for digital radio beam |
| JP63152451A Granted JPS6446353A (en) | 1980-11-21 | 1988-06-22 | Service signal receiver in digital radio line |
| JP63152450A Granted JPS6446352A (en) | 1980-11-21 | 1988-06-22 | Service signal transmitter in digital radio line |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56185596A Pending JPS57112160A (en) | 1980-11-21 | 1981-11-20 | Transmitter and receiver for processing for transmitting service signal for digital radio beam |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63152450A Granted JPS6446352A (en) | 1980-11-21 | 1988-06-22 | Service signal transmitter in digital radio line |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4426711A (en]) |
| EP (1) | EP0053051B1 (en]) |
| JP (3) | JPS57112160A (en]) |
| DE (1) | DE3168370D1 (en]) |
| FR (1) | FR2494938A1 (en]) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5066957A (en) * | 1989-04-21 | 1991-11-19 | Kokusai Denshin Denwa Co., Ltd. | Hybrid modulation satellite communication system |
| GB2307152B (en) * | 1995-11-10 | 1999-04-07 | Motorola Ltd | Method and apparatus for enhanced communication capability while maintaining standard channel modulation compatibility |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3609244A (en) | 1969-12-18 | 1971-09-28 | Bell Telephone Labor Inc | Conditional replenishment video system with variable length address code |
| US3603725A (en) | 1970-01-15 | 1971-09-07 | Bell Telephone Labor Inc | Conditional replenishment video system with reduced buffer memory delay |
| US3624306A (en) | 1971-01-21 | 1971-11-30 | George H Myers | Method and system for compressing bandwidth |
| US3720786A (en) | 1971-05-14 | 1973-03-13 | Bell Telephone Labor Inc | Onal replenishment video encoder with predictive updating19730313 |
| JPS5147311A (en) * | 1974-10-22 | 1976-04-22 | Fujitsu Ltd | Ai araamuhensohoshiki |
| FR2430139A1 (fr) | 1978-06-28 | 1980-01-25 | Labo Electronique Physique | Dispositif de compression de signaux binaires et systeme de transmission codee de fac-similes equipe de ce dispositif |
-
1980
- 1980-11-21 FR FR8024802A patent/FR2494938A1/fr active Granted
-
1981
- 1981-10-16 DE DE8181401635T patent/DE3168370D1/de not_active Expired
- 1981-10-16 EP EP81401635A patent/EP0053051B1/fr not_active Expired
- 1981-11-06 US US06/318,797 patent/US4426711A/en not_active Expired - Fee Related
- 1981-11-20 JP JP56185596A patent/JPS57112160A/ja active Pending
-
1988
- 1988-06-22 JP JP63152451A patent/JPS6446353A/ja active Granted
- 1988-06-22 JP JP63152450A patent/JPS6446352A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| EP0053051B1 (fr) | 1985-01-16 |
| JPS6446352A (en) | 1989-02-20 |
| EP0053051A1 (fr) | 1982-06-02 |
| JPH0243387B2 (en]) | 1990-09-28 |
| JPS57112160A (en) | 1982-07-13 |
| FR2494938A1 (fr) | 1982-05-28 |
| US4426711A (en) | 1984-01-17 |
| FR2494938B1 (en]) | 1984-03-02 |
| DE3168370D1 (en) | 1985-02-28 |
| JPS6446353A (en) | 1989-02-20 |
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