ZA9510509B - Dual-mode digital FM communication system - Google Patents
Dual-mode digital FM communication systemInfo
- Publication number
- ZA9510509B ZA9510509B ZA9510509A ZA9510509A ZA9510509B ZA 9510509 B ZA9510509 B ZA 9510509B ZA 9510509 A ZA9510509 A ZA 9510509A ZA 9510509 A ZA9510509 A ZA 9510509A ZA 9510509 B ZA9510509 B ZA 9510509B
- Authority
- ZA
- South Africa
- Prior art keywords
- dual
- communication system
- mode digital
- digital
- mode
- Prior art date
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
- H04B1/38—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
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
- H04L27/142—Compensating direct current components occurring during the demodulation and which are caused by mistuning
-
- 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
- H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
- H04L27/2335—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal
- H04L27/2337—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal using digital techniques to measure the time between zero-crossings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70707—Efficiency-related aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transceivers (AREA)
- Circuits Of Receivers In General (AREA)
- Transmitters (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US37312294A | 1994-12-23 | 1994-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA9510509B true ZA9510509B (en) | 1996-05-30 |
Family
ID=23471060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA9510509A ZA9510509B (en) | 1994-12-23 | 1995-12-11 | Dual-mode digital FM communication system |
Country Status (21)
Country | Link |
---|---|
US (1) | US5757858A (es) |
EP (1) | EP0799530B1 (es) |
JP (1) | JP3436372B2 (es) |
KR (1) | KR100427836B1 (es) |
CN (1) | CN1098569C (es) |
AR (1) | AR000415A1 (es) |
AT (1) | ATE264025T1 (es) |
AU (1) | AU700691B2 (es) |
BR (1) | BR9510534A (es) |
CA (1) | CA2208081C (es) |
DE (1) | DE69532863T2 (es) |
ES (1) | ES2222469T3 (es) |
FI (1) | FI972590A (es) |
HK (1) | HK1003689A1 (es) |
IL (1) | IL116475A (es) |
MX (1) | MX9704695A (es) |
MY (1) | MY114286A (es) |
RU (1) | RU2142205C1 (es) |
TW (1) | TW294867B (es) |
WO (1) | WO1996020540A2 (es) |
ZA (1) | ZA9510509B (es) |
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US5299228A (en) * | 1992-12-28 | 1994-03-29 | Motorola, Inc. | Method and apparatus of reducing power consumption in a CDMA communication unit |
US5475705A (en) * | 1993-04-29 | 1995-12-12 | Ericsson Ge Mobile Communications Inc. | Demodulator for Manchester-coded FM signals |
US5436955A (en) * | 1993-07-30 | 1995-07-25 | Hughes Aircraft Company | Compatible analog channel unit for a digital cellular telephone system |
US5422931A (en) * | 1993-09-22 | 1995-06-06 | Hughes Aircraft Company | Dual mode portable cellular telephone having switch control of the rf signal path to effectuate power savings |
US5539770A (en) * | 1993-11-19 | 1996-07-23 | Victor Company Of Japan, Ltd. | Spread spectrum modulating apparatus using either PSK or FSK primary modulation |
US5640385A (en) * | 1994-01-04 | 1997-06-17 | Motorola, Inc. | Method and apparatus for simultaneous wideband and narrowband wireless communication |
US5451948A (en) * | 1994-02-28 | 1995-09-19 | Cubic Communications, Inc. | Apparatus and method for combining analog and digital automatic gain control in receivers with digital signal processing |
ZA95605B (en) * | 1994-04-28 | 1995-12-20 | Qualcomm Inc | Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver |
US5436590A (en) * | 1994-08-25 | 1995-07-25 | Northern Telecom Limited | Digital FSK demodulator with automatic offset cancellation |
-
1995
- 1995-12-11 ZA ZA9510509A patent/ZA9510509B/xx unknown
- 1995-12-11 TW TW084113180A patent/TW294867B/zh active
- 1995-12-15 MY MYPI95003894A patent/MY114286A/en unknown
- 1995-12-19 BR BR9510534A patent/BR9510534A/pt not_active Application Discontinuation
- 1995-12-19 EP EP95944116A patent/EP0799530B1/en not_active Expired - Lifetime
- 1995-12-19 ES ES95944116T patent/ES2222469T3/es not_active Expired - Lifetime
- 1995-12-19 AT AT95944116T patent/ATE264025T1/de not_active IP Right Cessation
- 1995-12-19 RU RU97112204A patent/RU2142205C1/ru not_active IP Right Cessation
- 1995-12-19 CN CN95197705A patent/CN1098569C/zh not_active Expired - Fee Related
- 1995-12-19 MX MX9704695A patent/MX9704695A/es not_active IP Right Cessation
- 1995-12-19 KR KR1019970704331A patent/KR100427836B1/ko not_active IP Right Cessation
- 1995-12-19 WO PCT/US1995/016363 patent/WO1996020540A2/en active IP Right Grant
- 1995-12-19 JP JP52049296A patent/JP3436372B2/ja not_active Expired - Fee Related
- 1995-12-19 CA CA002208081A patent/CA2208081C/en not_active Expired - Fee Related
- 1995-12-19 DE DE69532863T patent/DE69532863T2/de not_active Expired - Fee Related
- 1995-12-19 AU AU45998/96A patent/AU700691B2/en not_active Ceased
- 1995-12-20 IL IL11647595A patent/IL116475A/xx active IP Right Revival
- 1995-12-21 AR AR33474695A patent/AR000415A1/es unknown
-
1997
- 1997-01-07 US US08/779,601 patent/US5757858A/en not_active Expired - Lifetime
- 1997-06-17 FI FI972590A patent/FI972590A/fi unknown
-
1998
- 1998-04-08 HK HK98102972A patent/HK1003689A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AR000415A1 (es) | 1997-06-18 |
WO1996020540A3 (en) | 1996-09-06 |
BR9510534A (pt) | 1998-07-14 |
ATE264025T1 (de) | 2004-04-15 |
CN1098569C (zh) | 2003-01-08 |
AU4599896A (en) | 1996-07-19 |
HK1003689A1 (en) | 1998-11-06 |
WO1996020540A2 (en) | 1996-07-04 |
RU2142205C1 (ru) | 1999-11-27 |
ES2222469T3 (es) | 2005-02-01 |
DE69532863D1 (de) | 2004-05-13 |
IL116475A0 (en) | 1996-03-31 |
TW294867B (es) | 1997-01-01 |
MX9704695A (es) | 1997-10-31 |
FI972590A0 (fi) | 1997-06-17 |
DE69532863T2 (de) | 2005-03-31 |
CN1176715A (zh) | 1998-03-18 |
JP3436372B2 (ja) | 2003-08-11 |
AU700691B2 (en) | 1999-01-14 |
MY114286A (en) | 2002-09-30 |
CA2208081C (en) | 2004-05-25 |
KR100427836B1 (ko) | 2004-10-14 |
FI972590A (fi) | 1997-08-25 |
EP0799530A2 (en) | 1997-10-08 |
JPH10511525A (ja) | 1998-11-04 |
EP0799530B1 (en) | 2004-04-07 |
IL116475A (en) | 1999-10-28 |
US5757858A (en) | 1998-05-26 |
CA2208081A1 (en) | 1996-07-04 |
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