WO1995012925A1 - Unite bimode sans fil a deux bandes de frequences a etalement de spectre - Google Patents
Unite bimode sans fil a deux bandes de frequences a etalement de spectre Download PDFInfo
- Publication number
- WO1995012925A1 WO1995012925A1 PCT/US1994/012464 US9412464W WO9512925A1 WO 1995012925 A1 WO1995012925 A1 WO 1995012925A1 US 9412464 W US9412464 W US 9412464W WO 9512925 A1 WO9512925 A1 WO 9512925A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency
- spread
- dual
- frequency bands
- megahertz
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
-
- 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
- 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
Definitions
- This invention relates to a dual mode wireless unit which uses two spread-spectrum communication bands.
- the invention provides a dual-band spread-spectrum modulator which uses a single, relatively narrow, synthe ⁇ sizer to serve two operating frequency bands.
- the synthesizer may operate in a high-side injection mode, while in the higher frequency range, the synthesizer may operate in a low-side injection mode.
- the lower frequency range may comprise about 1850 to 1990 megahertz, while the higher frequency range may comprise about 2400 to 2483.5 megahertz.
- Figure 1 shows a dual-mode spread-spectrum modulator with two frequency bands.
- Figure 2 shows a programmable frequency generator
- Figure 1 shows a dual-mode spread-spectrum modulator with two frequency bands.
- a first frequency source 101 may generate a first frequency fl 102, while a second frequency source 103 may generate a second frequency f2 104.
- the first frequency fl 102 and the second frequency f2 104 may be coupled to a multiplier 105, which may generate a bimodal signal 10S with a frequency distribution over two frequency ranges fL 107 and fH 108.
- the other frequency e.g., fl may be chosen between about 300 and 440 megahertz.
- the bimodal signal 106 may be coupled to a binary encoder 109, for encoding a data stream 110.
- the data stream 110 comprising a sequence of data bits 111, may be coupled to the binary encoder 109, which may generate a first frequency, e.g., fL 107, when a data bit 111 in the data stream 110 is a "0" bit, and may generate a second frequency, e.g., fH 108, when a data bit 111 in the data stream 110 is a "1" bit.
- the present invention also provides for monitoring a frequency in each band (or transmitting to a frequency in each band) at once, because both (fl + f2) and (fl - f2) can be stepped down to the same intermediate frequency with a single local oscillator.
- the intermediate frequency is 260 MHz and the local oscillator is set to 2180 MHz
- the present invention allows operation at both 1920 MHz and 2440 MHz.
- the local oscillator is set 10 MHz greater
- the present invention then allows opera ⁇ tion at both 1930 MHz and 2450 MHz, i.e., two frequencies each 10 MHz greater.
- the present invention allows reception or transmission on either frequency (or both) in the pair.
- FIG. 2 shows a programmable frequency generator.
- a reference frequency signal 201 may be coupled to a multiplier 202.
- the multiplier 202 may generate a signal f(s) 203, which may be coupled to a voltage-controlled oscillator (VCO) 204.
- VCO voltage-controlled oscillator
- the VCO 204 may be coupled to an output node 205, which provides an output frequency signal 206, and may also be coupled in a feedback configuration to the multiplier 202 by way of a programmable divide-by-N counter 207.
- the programmable divide-by-N counter 208 may be programmed by a set of control lines 209.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
- Mobile Radio Communication Systems (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95908412A EP0727112A4 (fr) | 1993-11-01 | 1994-10-31 | Unite bimode sans fil a deux bandes de frequences a etalement de spectre |
JP51332595A JP3692140B2 (ja) | 1993-11-01 | 1994-10-31 | 2つのスペクトル拡散周波数帯を有するデュアルモード無線装置 |
KR1019960702229A KR960706234A (ko) | 1993-11-01 | 1994-10-31 | 두개의 스펙트럼 확산 주파수 밴드를 갖는 이중 모드 와이어리스 유닛(Dual-Mode Wireless Unit with Two Spread-Spectrum Frequency Bands) |
EP04013982A EP1460772A3 (fr) | 1994-08-18 | 1995-08-15 | Système de télécommunication à spectre étalé à bandes multiples et à modes multiples |
DE69534991T DE69534991T2 (de) | 1994-08-18 | 1995-08-15 | Spreizspektrum-Kommunikationssystem in Mehrfachband- und Mehrfachmodetechnik |
PCT/US1995/010387 WO1996006490A1 (fr) | 1994-08-18 | 1995-08-15 | Systeme de telecommunication a spectre etale a bandes multiples et a modes multiples |
EP95931528A EP0776557B1 (fr) | 1994-08-18 | 1995-08-15 | Système de télécommunication a spectre étalé à bandes multiples et à modes multiples |
CA002197332A CA2197332A1 (fr) | 1994-08-18 | 1995-08-15 | Systeme de communication multibande et multimode a etalement du spectre |
AT95931528T ATE326793T1 (de) | 1994-08-18 | 1995-08-15 | Spreizspektrum-kommunikationssystem in mehrfachband- und mehrfachmodetechnik |
KR1019970701027A KR970705879A (ko) | 1994-08-18 | 1997-02-17 | 멀티-대역, 멀티-모드 스프레드 스펙트럼 통신 시스템(Multi-Band, Muliti-Mode Spread-Spectrum Communication System) |
JP2004164733A JP2004312766A (ja) | 1994-08-18 | 2004-06-02 | 通信方法、移動体無線通信のための装置及び無線通信方法 |
JP2006283774A JP2007116702A (ja) | 1994-08-18 | 2006-10-18 | 移動通信装置 |
JP2008067712A JP2008193721A (ja) | 1994-08-18 | 2008-03-17 | 通信方法、移動体無線通信のための装置及び無線通信方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14649293A | 1993-11-01 | 1993-11-01 | |
US08/146,492 | 1993-11-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1995012925A1 true WO1995012925A1 (fr) | 1995-05-11 |
WO1995012925B1 WO1995012925B1 (fr) | 1995-06-29 |
Family
ID=22517619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/012464 WO1995012925A1 (fr) | 1993-11-01 | 1994-10-31 | Unite bimode sans fil a deux bandes de frequences a etalement de spectre |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0727112A4 (fr) |
JP (1) | JP3692140B2 (fr) |
KR (1) | KR960706234A (fr) |
CA (1) | CA2175085A1 (fr) |
IL (1) | IL111471A (fr) |
WO (1) | WO1995012925A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0776557A1 (fr) * | 1994-08-18 | 1997-06-04 | Omnipoint Corporation | Systeme de telecommunication a spectre etale a bandes multiples et a modes multiples |
Citations (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 |
US5222099A (en) * | 1991-01-21 | 1993-06-22 | Sony Corporation | Spread spectrum signal receiving apparatus |
US5291516A (en) * | 1991-05-13 | 1994-03-01 | Omnipoint Data Company, Inc. | Dual mode transmitter and receiver |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5537002A (en) * | 1978-08-24 | 1980-03-14 | Fujitsu Ltd | Fs modulation system |
DE3627045A1 (de) * | 1986-08-09 | 1988-05-11 | Quante Fernmeldetechnik Gmbh | Alarmanlage |
US5079768A (en) * | 1990-03-23 | 1992-01-07 | Metricom, Inc. | Method for frequency sharing in frequency hopping communications network |
-
1994
- 1994-10-31 KR KR1019960702229A patent/KR960706234A/ko not_active Application Discontinuation
- 1994-10-31 JP JP51332595A patent/JP3692140B2/ja not_active Expired - Lifetime
- 1994-10-31 WO PCT/US1994/012464 patent/WO1995012925A1/fr not_active Application Discontinuation
- 1994-10-31 CA CA002175085A patent/CA2175085A1/fr not_active Abandoned
- 1994-10-31 IL IL111471A patent/IL111471A/en not_active IP Right Cessation
- 1994-10-31 EP EP95908412A patent/EP0727112A4/fr not_active Withdrawn
Patent Citations (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 |
US5222099A (en) * | 1991-01-21 | 1993-06-22 | Sony Corporation | Spread spectrum signal receiving apparatus |
US5291516A (en) * | 1991-05-13 | 1994-03-01 | Omnipoint Data Company, Inc. | Dual mode transmitter and receiver |
Non-Patent Citations (1)
Title |
---|
See also references of EP0727112A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0776557A1 (fr) * | 1994-08-18 | 1997-06-04 | Omnipoint Corporation | Systeme de telecommunication a spectre etale a bandes multiples et a modes multiples |
EP0776557A4 (fr) * | 1994-08-18 | 1998-11-25 | Omnipoint Corp | Systeme de telecommunication a spectre etale a bandes multiples et a modes multiples |
EP1460772A3 (fr) * | 1994-08-18 | 2004-10-13 | XIRCOM Wireless, Inc. | Système de télécommunication à spectre étalé à bandes multiples et à modes multiples |
Also Published As
Publication number | Publication date |
---|---|
JPH09504669A (ja) | 1997-05-06 |
CA2175085A1 (fr) | 1995-05-11 |
JP3692140B2 (ja) | 2005-09-07 |
IL111471A (en) | 1998-06-15 |
EP0727112A1 (fr) | 1996-08-21 |
EP0727112A4 (fr) | 1998-01-21 |
IL111471A0 (en) | 1994-12-29 |
KR960706234A (ko) | 1996-11-08 |
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