CA2081694A1 - Circuit de modulation en quadrature - Google Patents
Circuit de modulation en quadratureInfo
- Publication number
- CA2081694A1 CA2081694A1 CA2081694A CA2081694A CA2081694A1 CA 2081694 A1 CA2081694 A1 CA 2081694A1 CA 2081694 A CA2081694 A CA 2081694A CA 2081694 A CA2081694 A CA 2081694A CA 2081694 A1 CA2081694 A1 CA 2081694A1
- Authority
- CA
- Canada
- Prior art keywords
- quadrature modulation
- modulation circuit
- circuit
- vco
- analog
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
-
- 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
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
-
- 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)
- Transmitters (AREA)
- Transceivers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3-311640 | 1991-10-30 | ||
JP3311640A JP2727829B2 (ja) | 1991-10-30 | 1991-10-30 | 直交変調回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2081694A1 true CA2081694A1 (fr) | 1993-05-01 |
CA2081694C CA2081694C (fr) | 1995-05-02 |
Family
ID=18019706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002081694A Expired - Fee Related CA2081694C (fr) | 1991-10-30 | 1992-10-29 | Circuit de modulation en quadrature |
Country Status (5)
Country | Link |
---|---|
US (1) | US5319675A (fr) |
JP (1) | JP2727829B2 (fr) |
KR (1) | KR960005051B1 (fr) |
AU (1) | AU2742292A (fr) |
CA (1) | CA2081694C (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5745523A (en) * | 1992-10-27 | 1998-04-28 | Ericsson Inc. | Multi-mode signal processing |
US5535247A (en) * | 1993-09-24 | 1996-07-09 | Motorola, Inc. | Frequency modifier for a transmitter |
US5574755A (en) * | 1994-01-25 | 1996-11-12 | Philips Electronics North America Corporation | I/Q quadraphase modulator circuit |
US5854813A (en) * | 1994-12-29 | 1998-12-29 | Motorola, Inc. | Multiple access up converter/modulator and method |
JP3256422B2 (ja) * | 1995-10-23 | 2002-02-12 | 日本電気株式会社 | 周波数シンセサイザ |
JP2998625B2 (ja) * | 1996-01-12 | 2000-01-11 | 日本電気株式会社 | デジタル/アナログ共用変調器 |
US5999355A (en) * | 1996-04-30 | 1999-12-07 | Cirrus Logic, Inc. | Gain and phase constrained adaptive equalizing filter in a sampled amplitude read channel for magnetic recording |
US6415002B1 (en) * | 1998-04-07 | 2002-07-02 | Nortel Networks Limited | Phase and amplitude modulation of baseband signals |
JP2002158725A (ja) * | 2000-11-20 | 2002-05-31 | Fujitsu General Ltd | デュアルモード変調装置 |
US6882831B2 (en) * | 2001-12-07 | 2005-04-19 | Broadcom Corporation | Translational loop transmitter architecture employing channel power ratio measurements for modulation accuracy calibration |
EP2981038A4 (fr) | 2013-03-28 | 2016-11-02 | Kyocera Corp | Dispositif de communication radio et procédé de traitement de signal |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4691318A (en) * | 1983-03-04 | 1987-09-01 | Radyne Corporation | Data transmission system with error correcting data encoding |
JP2595961B2 (ja) * | 1987-04-03 | 1997-04-02 | 日本電気株式会社 | デイジタル変復調システム |
JPS6436153A (en) * | 1987-07-31 | 1989-02-07 | Nec Corp | Quadruple phase modulator |
US4972440A (en) * | 1988-09-23 | 1990-11-20 | Hughes Aircraft Company | Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals |
JPH02295260A (ja) * | 1989-05-10 | 1990-12-06 | Toshiba Corp | 変調器 |
-
1991
- 1991-10-30 JP JP3311640A patent/JP2727829B2/ja not_active Expired - Lifetime
-
1992
- 1992-10-29 CA CA002081694A patent/CA2081694C/fr not_active Expired - Fee Related
- 1992-10-29 AU AU27422/92A patent/AU2742292A/en not_active Abandoned
- 1992-10-30 US US07/968,841 patent/US5319675A/en not_active Expired - Fee Related
- 1992-10-30 KR KR1019920020186A patent/KR960005051B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR930009228A (ko) | 1993-05-22 |
AU2742292A (en) | 1993-05-06 |
US5319675A (en) | 1994-06-07 |
CA2081694C (fr) | 1995-05-02 |
KR960005051B1 (ko) | 1996-04-18 |
JPH05122088A (ja) | 1993-05-18 |
JP2727829B2 (ja) | 1998-03-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |