EP0727112A4 - Dual-mode wireless unit with two spread-spectrum frequency bands - Google Patents
Dual-mode wireless unit with two spread-spectrum frequency bandsInfo
- Publication number
- EP0727112A4 EP0727112A4 EP95908412A EP95908412A EP0727112A4 EP 0727112 A4 EP0727112 A4 EP 0727112A4 EP 95908412 A EP95908412 A EP 95908412A EP 95908412 A EP95908412 A EP 95908412A EP 0727112 A4 EP0727112 A4 EP 0727112A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- spread
- dual
- frequency bands
- megahertz
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
-
- 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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
-
- 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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- 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
- 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
- H04B1/69—Spread spectrum techniques
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
- H04B7/2634—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for channel frequency control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
-
- 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
- H04L27/12—Modulator circuits; Transmitter circuits
-
- 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)
- Quality & Reliability (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14649293A | 1993-11-01 | 1993-11-01 | |
US146492 | 1993-11-01 | ||
PCT/US1994/012464 WO1995012925A1 (en) | 1993-11-01 | 1994-10-31 | Dual-mode wireless unit with two spread-spectrum frequency bands |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0727112A1 EP0727112A1 (en) | 1996-08-21 |
EP0727112A4 true EP0727112A4 (en) | 1998-01-21 |
Family
ID=22517619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95908412A Withdrawn EP0727112A4 (en) | 1993-11-01 | 1994-10-31 | Dual-mode wireless unit with two spread-spectrum frequency bands |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0727112A4 (en) |
JP (1) | JP3692140B2 (en) |
KR (1) | KR960706234A (en) |
CA (1) | CA2175085A1 (en) |
IL (1) | IL111471A (en) |
WO (1) | WO1995012925A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL114924A (en) * | 1994-08-18 | 2000-02-17 | Omnipoint Corp | Multi-land multi-mode communication system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368439A (en) * | 1978-08-24 | 1983-01-11 | Fujitsu Limited | Frequency shift keying system |
DE3627045A1 (en) * | 1986-08-09 | 1988-05-11 | Quante Fernmeldetechnik Gmbh | Alarm system |
EP0450382A2 (en) * | 1990-03-23 | 1991-10-09 | METRICOM, INC. (a Delaware corp.) | Method for frequency sharing in a frequency hopping communications network |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4435821A (en) * | 1981-03-24 | 1984-03-06 | Nippon Electric Co., Ltd. | Receiver in a frequency hopping communication system |
US4979170A (en) * | 1988-01-19 | 1990-12-18 | Qualcomm, Inc. | Alternating sequential half duplex communication system |
AU642571B2 (en) * | 1991-01-21 | 1993-10-21 | Sony Corporation | Spread spectrum signal receiving apparatus |
DE69232943T2 (en) * | 1991-05-13 | 2003-08-28 | Xircom Wireless Inc | TRANSMITTER / RECEIVER WITH TWO OPERATING MODES |
-
1994
- 1994-10-31 WO PCT/US1994/012464 patent/WO1995012925A1/en not_active Application Discontinuation
- 1994-10-31 EP EP95908412A patent/EP0727112A4/en not_active Withdrawn
- 1994-10-31 KR KR1019960702229A patent/KR960706234A/en not_active Application Discontinuation
- 1994-10-31 IL IL111471A patent/IL111471A/en not_active IP Right Cessation
- 1994-10-31 CA CA002175085A patent/CA2175085A1/en not_active Abandoned
- 1994-10-31 JP JP51332595A patent/JP3692140B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368439A (en) * | 1978-08-24 | 1983-01-11 | Fujitsu Limited | Frequency shift keying system |
DE3627045A1 (en) * | 1986-08-09 | 1988-05-11 | Quante Fernmeldetechnik Gmbh | Alarm system |
EP0450382A2 (en) * | 1990-03-23 | 1991-10-09 | METRICOM, INC. (a Delaware corp.) | Method for frequency sharing in a frequency hopping communications network |
Non-Patent Citations (1)
Title |
---|
See also references of WO9512925A1 * |
Also Published As
Publication number | Publication date |
---|---|
IL111471A (en) | 1998-06-15 |
CA2175085A1 (en) | 1995-05-11 |
JPH09504669A (en) | 1997-05-06 |
KR960706234A (en) | 1996-11-08 |
IL111471A0 (en) | 1994-12-29 |
WO1995012925A1 (en) | 1995-05-11 |
EP0727112A1 (en) | 1996-08-21 |
JP3692140B2 (en) | 2005-09-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19960531 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 19971204 |
|
AK | Designated contracting states |
Kind code of ref document: A4 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
17Q | First examination report despatched |
Effective date: 19980520 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19981105 |