IT1085102B - Circuito di sincronizzazione di fase - Google Patents
Circuito di sincronizzazione di faseInfo
- Publication number
- IT1085102B IT1085102B IT21430/77A IT2143077A IT1085102B IT 1085102 B IT1085102 B IT 1085102B IT 21430/77 A IT21430/77 A IT 21430/77A IT 2143077 A IT2143077 A IT 2143077A IT 1085102 B IT1085102 B IT 1085102B
- Authority
- IT
- Italy
- Prior art keywords
- synchronization circuit
- phase synchronization
- phase
- circuit
- synchronization
- 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
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
- H04L27/3836—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51031023A JPS58698B2 (ja) | 1976-03-22 | 1976-03-22 | 位相同期回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1085102B true IT1085102B (it) | 1985-05-28 |
Family
ID=12319907
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT21430/77A IT1085102B (it) | 1976-03-22 | 1977-03-21 | Circuito di sincronizzazione di fase |
Country Status (4)
Country | Link |
---|---|
US (1) | US4099130A (it) |
JP (1) | JPS58698B2 (it) |
DE (1) | DE2712381C3 (it) |
IT (1) | IT1085102B (it) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5925500B2 (ja) * | 1978-03-03 | 1984-06-18 | 日本電気株式会社 | 搬送波再生回路 |
US4334312A (en) * | 1979-08-10 | 1982-06-08 | Nippon Electric Co., Ltd. | Phase synchronizing circuit for use in multi-level, multi-phase, superposition-modulated signal transmission system |
US4320345A (en) * | 1980-04-28 | 1982-03-16 | Sangamo Weston, Inc. | Adaptive differential PSK demodulator |
US4525676A (en) * | 1981-02-24 | 1985-06-25 | Nippon Electric Co., Ltd. | PSK Demodulation system having carrier frequency variation compensation |
JPS58194450A (ja) * | 1982-05-07 | 1983-11-12 | Nec Corp | 復調装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5716546B2 (it) * | 1973-07-12 | 1982-04-06 | ||
US4039961A (en) * | 1974-09-12 | 1977-08-02 | Nippon Telegraph And Telephone Public Corporation | Demodulator for combined digital amplitude and phase keyed modulation signals |
JPS5297661A (en) * | 1976-02-13 | 1977-08-16 | Nippon Telegr & Teleph Corp <Ntt> | Carrier wave reproduction equipment |
-
1976
- 1976-03-22 JP JP51031023A patent/JPS58698B2/ja not_active Expired
-
1977
- 1977-03-21 IT IT21430/77A patent/IT1085102B/it active
- 1977-03-21 US US05/779,878 patent/US4099130A/en not_active Expired - Lifetime
- 1977-03-22 DE DE2712381A patent/DE2712381C3/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS52114256A (en) | 1977-09-24 |
DE2712381C3 (de) | 1980-05-22 |
JPS58698B2 (ja) | 1983-01-07 |
DE2712381B2 (de) | 1979-09-06 |
US4099130A (en) | 1978-07-04 |
DE2712381A1 (de) | 1977-09-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950327 |