WO1998039885A3 - Technique to phase lock a transceiving, transmitting, or receiving local oscillator to an incoming carrier signal - Google Patents

Technique to phase lock a transceiving, transmitting, or receiving local oscillator to an incoming carrier signal Download PDF

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Publication number
WO1998039885A3
WO1998039885A3 PCT/US1998/003768 US9803768W WO9839885A3 WO 1998039885 A3 WO1998039885 A3 WO 1998039885A3 US 9803768 W US9803768 W US 9803768W WO 9839885 A3 WO9839885 A3 WO 9839885A3
Authority
WO
WIPO (PCT)
Prior art keywords
transceiving
transmitting
technique
carrier signal
local oscillator
Prior art date
Application number
PCT/US1998/003768
Other languages
French (fr)
Other versions
WO1998039885A2 (en
Inventor
Barry Thornton
Original Assignee
Int Labs Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Int Labs Inc filed Critical Int Labs Inc
Priority to AU66695/98A priority Critical patent/AU6669598A/en
Publication of WO1998039885A2 publication Critical patent/WO1998039885A2/en
Publication of WO1998039885A3 publication Critical patent/WO1998039885A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3836—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transmitters (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Method and apparatus for recovering the incoming signal carrier in a radio frequency ('RF') transmission and using the recovered carrier to demodulate the information contained in the sidebands of the same RF transmission is described. The recovered carrier may also be used as the suppressed carrier for another RF transmission on the same frequency.
PCT/US1998/003768 1997-03-03 1998-02-26 Technique to phase lock a transceiving, transmitting, or receiving local oscillator to an incoming carrier signal WO1998039885A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU66695/98A AU6669598A (en) 1997-03-03 1998-02-26 Technique to phase lock a transceiving, transmitting, or receiving local oscillator to an incoming carrier signal

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US3983397P 1997-03-03 1997-03-03
US60/039,833 1997-03-03
US95624497A 1997-10-22 1997-10-22
US08/956,244 1997-10-22

Publications (2)

Publication Number Publication Date
WO1998039885A2 WO1998039885A2 (en) 1998-09-11
WO1998039885A3 true WO1998039885A3 (en) 1998-12-03

Family

ID=26716494

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/003768 WO1998039885A2 (en) 1997-03-03 1998-02-26 Technique to phase lock a transceiving, transmitting, or receiving local oscillator to an incoming carrier signal

Country Status (2)

Country Link
AU (1) AU6669598A (en)
WO (1) WO1998039885A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769587A (en) * 1971-10-19 1973-10-30 Nippon Electric Co Synchronizing system for phase-modulation telecommunication system
US4100499A (en) * 1976-10-18 1978-07-11 International Business Machines Corporation Carrier synchronization system for coherent phase demodulators
US4270221A (en) * 1979-10-17 1981-05-26 Rca Corporation Phaselocked receiver with orderwire channel
US4581748A (en) * 1982-12-29 1986-04-08 Fujitsu Limited QAM with DC bias in one channel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769587A (en) * 1971-10-19 1973-10-30 Nippon Electric Co Synchronizing system for phase-modulation telecommunication system
US4100499A (en) * 1976-10-18 1978-07-11 International Business Machines Corporation Carrier synchronization system for coherent phase demodulators
US4270221A (en) * 1979-10-17 1981-05-26 Rca Corporation Phaselocked receiver with orderwire channel
US4581748A (en) * 1982-12-29 1986-04-08 Fujitsu Limited QAM with DC bias in one channel

Also Published As

Publication number Publication date
WO1998039885A2 (en) 1998-09-11
AU6669598A (en) 1998-09-22

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