FR2665991B1 - - Google Patents
Info
- Publication number
- FR2665991B1 FR2665991B1 FR9109678A FR9109678A FR2665991B1 FR 2665991 B1 FR2665991 B1 FR 2665991B1 FR 9109678 A FR9109678 A FR 9109678A FR 9109678 A FR9109678 A FR 9109678A FR 2665991 B1 FR2665991 B1 FR 2665991B1
- Authority
- FR
- France
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0032—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage with analogue quadrature frequency conversion to and from the baseband
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
- H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
- H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Mobile Radio Communication Systems (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Transceivers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/559,775 US5163159A (en) | 1990-07-30 | 1990-07-30 | Dual mode automatic frequency control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2665991A1 FR2665991A1 (fr) | 1992-02-21 |
| FR2665991B1 true FR2665991B1 (US20020051482A1-20020502-M00057.png) | 1995-03-31 |
Family
ID=24234969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9109678A Granted FR2665991A1 (fr) | 1990-07-30 | 1991-07-30 | Systeme de commande de frequence a mode double. |
Country Status (10)
Families Citing this family (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2773524B2 (ja) * | 1992-02-29 | 1998-07-09 | 日本電気株式会社 | ディジタル移動無線受信機 |
| IL102051A (en) * | 1992-05-29 | 1996-05-14 | Tadiran Ltd | Vehicle location unit |
| JP3241098B2 (ja) * | 1992-06-12 | 2001-12-25 | 株式会社東芝 | 多方式対応の受信装置 |
| ES2174145T3 (es) * | 1992-06-29 | 2002-11-01 | Motorola Inc | Receptor de modo dual con capacidad para ahorro de bateria. |
| FI102798B1 (fi) * | 1992-07-28 | 1999-02-15 | Nokia Mobile Phones Ltd | Digitaalisen matkapuhelimen radiotaajuusosan piirijärjestely |
| US5418818A (en) * | 1992-09-22 | 1995-05-23 | Glenayre Electronics, Inc. | Digital signal processor exciter |
| US5867537A (en) * | 1992-10-27 | 1999-02-02 | Ericsson Inc. | Balanced tranversal I,Q filters for quadrature modulators |
| US5727023A (en) * | 1992-10-27 | 1998-03-10 | Ericsson Inc. | Apparatus for and method of speech digitizing |
| US5530722A (en) * | 1992-10-27 | 1996-06-25 | Ericsson Ge Mobile Communications Inc. | Quadrature modulator with integrated distributed RC filters |
| US5745523A (en) * | 1992-10-27 | 1998-04-28 | Ericsson Inc. | Multi-mode signal processing |
| US5483686A (en) * | 1992-11-02 | 1996-01-09 | Matsushita Electric Industrial Co., Ltd. | Channel selecting apparatus for simultaneous use with both phase-continuous modulation signals and digital modulation signals |
| KR0183143B1 (ko) * | 1993-02-17 | 1999-05-15 | 안쏘니 제이. 살리, 쥬니어 | 다중-변조 통신 시스템 |
| US5392460A (en) * | 1993-04-23 | 1995-02-21 | Nokia Mobile Phones Ltd. | Dual mode radiotelephone terminal selectively operable for frequency modulated or phase modulated operation |
| CA2127190A1 (en) * | 1993-08-06 | 1995-02-07 | Stephen Vincent Cahill | Apparatus and method for automatically controlling a reference frequency in a dual mode receiver |
| JPH07154439A (ja) * | 1993-11-26 | 1995-06-16 | Nec Eng Ltd | 復調装置 |
| DE4341435A1 (de) * | 1993-12-04 | 1995-06-08 | Bosch Gmbh Robert | Funkgerät |
| US5701589A (en) * | 1994-05-20 | 1997-12-23 | Motorola, Inc. | Method for adjusting reference frequencies in a communication system |
| US5519887A (en) * | 1994-08-09 | 1996-05-21 | At&T Corp. | Switchable filter phase-locked loop frequency synthesizer device and method for achieving dual-mode cellular communications |
| JPH08204763A (ja) * | 1994-11-21 | 1996-08-09 | Sony Corp | 送信機及び送受信機 |
| ZA9510509B (en) * | 1994-12-23 | 1996-05-30 | Qualcomm Inc | Dual-mode digital FM communication system |
| US5774195A (en) * | 1995-01-24 | 1998-06-30 | Kabushiki Kaisha Toshiba | Broadcasting system discriminating television receiver for differentiating between analog and digital telecast signals |
| US5825833A (en) * | 1995-01-31 | 1998-10-20 | Mitsumi Electric Co., Ltd. | Digital and analog reception apparatus |
| GB9505522D0 (en) * | 1995-03-18 | 1995-05-03 | Gen Electric Co Plc | Commodity consumption registering meters |
| US6006108A (en) * | 1996-01-31 | 1999-12-21 | Qualcomm Incorporated | Digital audio processing in a dual-mode telephone |
| GB2310342A (en) * | 1996-02-16 | 1997-08-20 | Northern Telecom Ltd | Dual mode radio transceiver front end |
| US6026129A (en) * | 1996-03-27 | 2000-02-15 | Matsushita Electric Industrial Co., Ltd. | Radio receiving apparatus for receiving communication signals of different bandwidths |
| GB2314981A (en) * | 1996-07-02 | 1998-01-14 | Plessey Semiconductors Ltd | Radio receiver arrangements |
| US6546044B1 (en) * | 1996-10-11 | 2003-04-08 | Ericsson Inc. | Dual-mode radiotelephone apparatus for digital or analog modulation |
| SE519263C2 (sv) * | 1996-12-02 | 2003-02-04 | Ericsson Telefon Ab L M | Anordning för sändning på flera frekvenser i ett radiokommunikationssystem |
| US6154204A (en) * | 1998-01-21 | 2000-11-28 | Evolve Products, Inc. | Tap antenna unit |
| DK0945990T3 (da) * | 1998-03-14 | 2006-01-16 | Siemens Ag | Multibåndsreceiver til multibåndsradiosignaler og multibåndsmobiltelefon omfattende en receiver |
| US5982823A (en) * | 1998-03-17 | 1999-11-09 | Northrop Grumman Corp | Direct frequency selection and down-conversion for digital receivers |
| KR100274089B1 (ko) * | 1998-09-02 | 2000-12-15 | 윤종용 | 듀얼모드 단말기의 자동주파수 제어회로 및 방법 |
| JP3551235B2 (ja) * | 1999-06-25 | 2004-08-04 | 日本電気株式会社 | Ａｆｃ回路 |
| JP3576880B2 (ja) * | 1999-09-09 | 2004-10-13 | 日本電気株式会社 | 自動変調方式識別装置及び自動変調方式識別方法 |
| US6799062B1 (en) | 2000-10-19 | 2004-09-28 | Motorola Inc. | Full-duplex hands-free transparency circuit and method therefor |
| US20030060180A1 (en) * | 2001-09-27 | 2003-03-27 | Hall William E. | Image reject receiver |
| US6741840B2 (en) * | 2002-03-13 | 2004-05-25 | Motorola, Inc. | RF transmitters with saturation detection and correction and methods therefor |
| ITMI20041599A1 (it) * | 2004-08-03 | 2004-11-03 | Prod El S P A | Metodo e apparecchiatura per comunicazioni radio con moduklazione analogica e digitale |
| CN115276800B (zh) * | 2022-07-28 | 2023-07-25 | 徐州智谷光频产业研究院有限公司 | 基于数字信号与模拟信号混合调制解调的可见光通信系统 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5648732A (en) * | 1979-09-28 | 1981-05-02 | Nec Corp | Radio equipment |
| US4335401A (en) * | 1980-08-28 | 1982-06-15 | Rca Corporation | Rapid correlation of recorded information |
| US4677690A (en) * | 1982-01-25 | 1987-06-30 | International Telephone And Telegraph Corporation | Baseband demodulator for FM and/or AM signals |
| US4704734A (en) * | 1986-02-18 | 1987-11-03 | Motorola, Inc. | Method and apparatus for signal strength measurement and antenna selection in cellular radiotelephone systems |
| US4852086A (en) * | 1986-10-31 | 1989-07-25 | Motorola, Inc. | SSB communication system with FM data capability |
| WO1988003342A1 (en) * | 1986-10-31 | 1988-05-05 | Motorola, Inc. | Ssb communiction system with fm data capability |
| US4893094A (en) * | 1989-03-13 | 1990-01-09 | Motorola, Inc. | Frequency synthesizer with control of start-up battery saving operations |
-
1990
- 1990-07-30 US US07/559,775 patent/US5163159A/en not_active Expired - Lifetime
-
1991
- 1991-07-11 CA CA002066420A patent/CA2066420C/en not_active Expired - Fee Related
- 1991-07-11 AU AU83950/91A patent/AU655934B2/en not_active Ceased
- 1991-07-11 JP JP3514258A patent/JP2621657B2/ja not_active Expired - Lifetime
- 1991-07-11 WO PCT/US1991/004874 patent/WO1992002991A1/en active Application Filing
- 1991-07-11 DE DE4191766A patent/DE4191766C2/de not_active Expired - Fee Related
- 1991-07-11 DE DE4191766T patent/DE4191766T1/de active Pending
- 1991-07-30 FR FR9109678A patent/FR2665991A1/fr active Granted
- 1991-07-30 MX MX9100427A patent/MX9100427A/es not_active IP Right Cessation
-
1992
- 1992-03-30 GB GB9207025A patent/GB2253751B/en not_active Expired - Fee Related
-
1997
- 1997-03-06 HK HK25797A patent/HK25797A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE4191766C2 (de) | 1999-08-19 |
| CA2066420A1 (en) | 1992-01-31 |
| AU655934B2 (en) | 1995-01-19 |
| GB2253751A (en) | 1992-09-16 |
| JP2621657B2 (ja) | 1997-06-18 |
| WO1992002991A1 (en) | 1992-02-20 |
| GB9207025D0 (en) | 1992-05-27 |
| JPH05502152A (ja) | 1993-04-15 |
| DE4191766T1 (de) | 1997-07-31 |
| GB2253751B (en) | 1994-04-27 |
| HK25797A (en) | 1997-03-06 |
| FR2665991A1 (fr) | 1992-02-21 |
| MX9100427A (es) | 1992-02-28 |
| CA2066420C (en) | 1996-10-22 |
| AU8395091A (en) | 1992-03-02 |
| US5163159A (en) | 1992-11-10 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |