WO2002015428A3 - Spread spectrum transmission for expanding information capacity in existing communication transmission systems - Google Patents

Spread spectrum transmission for expanding information capacity in existing communication transmission systems Download PDF

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Publication number
WO2002015428A3
WO2002015428A3 PCT/US2001/041734 US0141734W WO0215428A3 WO 2002015428 A3 WO2002015428 A3 WO 2002015428A3 US 0141734 W US0141734 W US 0141734W WO 0215428 A3 WO0215428 A3 WO 0215428A3
Authority
WO
WIPO (PCT)
Prior art keywords
spread spectrum
systems
processes
programming
transmissions
Prior art date
Application number
PCT/US2001/041734
Other languages
French (fr)
Other versions
WO2002015428A2 (en
Inventor
Walter S Cicora
Ted Hartson
Original Assignee
Dotcast Inc
Walter S Cicora
Ted Hartson
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 Dotcast Inc, Walter S Cicora, Ted Hartson filed Critical Dotcast Inc
Priority to AU2001287182A priority Critical patent/AU2001287182A1/en
Publication of WO2002015428A2 publication Critical patent/WO2002015428A2/en
Publication of WO2002015428A3 publication Critical patent/WO2002015428A3/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/08Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/081Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division the additional information signals being transmitted by means of a subcarrier
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/025Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/08Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/083Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical and the horizontal blanking interval, e.g. MAC data signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2201/00Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70715Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation with application-specific features

Abstract

Systems and processes for including spread spectrum transmissions within television and radio broadcast channels without substantial degradation of the broadcast programming. The spread spectrum transmissions may carry components of the same television or radio programming, they may be the same programming, or they may be content that is unrelated to the programming. Disclosed are systems and processes for accomplishing such spread spectrum transmissions in a manner that compensates for robustness of signal components, by among other things time varying and/or varying frequency of the spread spectrum transmissions. Also disclosed are systems and processes for abating carrier signals to compensate for the effects of the spread spectrum transmissions in the channel. Further disclosed are systems and processes for conducting such transmissions in a cellular communications system.
PCT/US2001/041734 2000-08-15 2001-08-15 Spread spectrum transmission for expanding information capacity in existing communication transmission systems WO2002015428A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001287182A AU2001287182A1 (en) 2000-08-15 2001-08-15 Communications system improvement for expanded information capacity for existingcommunication transmission systems using spread spectrum techniques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22548300P 2000-08-15 2000-08-15
US60/225,483 2000-08-15

Publications (2)

Publication Number Publication Date
WO2002015428A2 WO2002015428A2 (en) 2002-02-21
WO2002015428A3 true WO2002015428A3 (en) 2002-06-13

Family

ID=22845053

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/041734 WO2002015428A2 (en) 2000-08-15 2001-08-15 Spread spectrum transmission for expanding information capacity in existing communication transmission systems

Country Status (3)

Country Link
AU (1) AU2001287182A1 (en)
UY (1) UY26890A1 (en)
WO (1) WO2002015428A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838444A (en) * 1972-10-30 1974-09-24 Hazeltine Research Inc System for transmitting auxiliary information in low energy density portion of color tv spectrum
US4821120A (en) * 1985-06-13 1989-04-11 Devon County Council Television sub-carrier transmission
US5812184A (en) * 1986-05-14 1998-09-22 Radio Telecom & Technology, Inc. Transmission of frame-to-frame reversed polarity signals in a two-way cable TV conversion system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838444A (en) * 1972-10-30 1974-09-24 Hazeltine Research Inc System for transmitting auxiliary information in low energy density portion of color tv spectrum
US4821120A (en) * 1985-06-13 1989-04-11 Devon County Council Television sub-carrier transmission
US5812184A (en) * 1986-05-14 1998-09-22 Radio Telecom & Technology, Inc. Transmission of frame-to-frame reversed polarity signals in a two-way cable TV conversion system

Also Published As

Publication number Publication date
AU2001287182A1 (en) 2002-02-25
UY26890A1 (en) 2002-02-28
WO2002015428A2 (en) 2002-02-21

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