NL7403957A - Spread spectrum communication using multiple transmission and access - imparts additional modulating signal to carrier at sender producing sub carrier and code - Google Patents

Spread spectrum communication using multiple transmission and access - imparts additional modulating signal to carrier at sender producing sub carrier and code

Info

Publication number
NL7403957A
NL7403957A NL7403957A NL7403957A NL7403957A NL 7403957 A NL7403957 A NL 7403957A NL 7403957 A NL7403957 A NL 7403957A NL 7403957 A NL7403957 A NL 7403957A NL 7403957 A NL7403957 A NL 7403957A
Authority
NL
Netherlands
Prior art keywords
carrier
code
spread spectrum
spectrum communication
multiple transmission
Prior art date
Application number
NL7403957A
Other languages
Dutch (nl)
Original Assignee
Shape Technical Centre
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 Shape Technical Centre filed Critical Shape Technical Centre
Priority to NL7403957A priority Critical patent/NL7403957A/en
Priority to CA221,820A priority patent/CA1046669A/en
Publication of NL7403957A publication Critical patent/NL7403957A/en

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
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible

Abstract

Spread spectrum communication system using multiple transmission and multiple access technique in space satellite circuits. The sy stem uses a single carrier (5) and the transmitter imparts an additional modulating signal for recognition at the receiving end by special equipment (12). The additional modulating signals (6) imparted at the sending end will cause sub carrier frequencies to be generated. This becomes a code of a carrier modulated by a recognisable signal which is synchronised with the original forming a summated (7) transmitted carrier at the sending end. This composite carrier is resolved at the receiving end with the aid of the extra modulation and the information in the derived sub carriers.
NL7403957A 1974-03-22 1974-03-22 Spread spectrum communication using multiple transmission and access - imparts additional modulating signal to carrier at sender producing sub carrier and code NL7403957A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL7403957A NL7403957A (en) 1974-03-22 1974-03-22 Spread spectrum communication using multiple transmission and access - imparts additional modulating signal to carrier at sender producing sub carrier and code
CA221,820A CA1046669A (en) 1974-03-22 1975-03-11 Spread spectrum communication techniques for a code division message multiplexing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7403957A NL7403957A (en) 1974-03-22 1974-03-22 Spread spectrum communication using multiple transmission and access - imparts additional modulating signal to carrier at sender producing sub carrier and code

Publications (1)

Publication Number Publication Date
NL7403957A true NL7403957A (en) 1975-09-24

Family

ID=19821025

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7403957A NL7403957A (en) 1974-03-22 1974-03-22 Spread spectrum communication using multiple transmission and access - imparts additional modulating signal to carrier at sender producing sub carrier and code

Country Status (2)

Country Link
CA (1) CA1046669A (en)
NL (1) NL7403957A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2837641A1 (en) 1977-08-29 1979-03-22 Hydroacoustic Inc METHOD AND DEVICE FOR GENERATING AND TRANSMITTING SIGNALS

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2220824A (en) * 1988-07-13 1990-01-17 Philips Electronic Associated Transmission system for sending two signals simultaneously on the same communications channel
US6560461B1 (en) 1997-08-04 2003-05-06 Mundi Fomukong Authorized location reporting paging system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2837641A1 (en) 1977-08-29 1979-03-22 Hydroacoustic Inc METHOD AND DEVICE FOR GENERATING AND TRANSMITTING SIGNALS

Also Published As

Publication number Publication date
CA1046669A (en) 1979-01-16

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Legal Events

Date Code Title Description
BV The patent application has lapsed