DE68911188T2 - Asynchroner digitaler Korrelator und diesen Korrelator enthaltende Demodulatoren. - Google Patents

Asynchroner digitaler Korrelator und diesen Korrelator enthaltende Demodulatoren.

Info

Publication number
DE68911188T2
DE68911188T2 DE89400918T DE68911188T DE68911188T2 DE 68911188 T2 DE68911188 T2 DE 68911188T2 DE 89400918 T DE89400918 T DE 89400918T DE 68911188 T DE68911188 T DE 68911188T DE 68911188 T2 DE68911188 T2 DE 68911188T2
Authority
DE
Germany
Prior art keywords
correlator
demodulators
asynchronous digital
digital correlator
asynchronous
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.)
Expired - Lifetime
Application number
DE89400918T
Other languages
English (en)
Other versions
DE68911188D1 (de
Inventor
Vincent Albrieux
Didier Soufflet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LMT Radio Professionnelle
Original Assignee
LMT Radio Professionnelle
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 LMT Radio Professionnelle filed Critical LMT Radio Professionnelle
Publication of DE68911188D1 publication Critical patent/DE68911188D1/de
Application granted granted Critical
Publication of DE68911188T2 publication Critical patent/DE68911188T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/15—Correlation function computation including computation of convolution operations
    • 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
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/70718—Spread spectrum techniques using direct sequence modulation with asynchronous demodulation, i.e. not requiring code synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L23/00—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00
    • H04L23/02—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00 adapted for orthogonal signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • H04L27/2278—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using correlation techniques, e.g. for spread spectrum signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H04J13/0025—M-sequences
DE89400918T 1988-04-08 1989-04-04 Asynchroner digitaler Korrelator und diesen Korrelator enthaltende Demodulatoren. Expired - Lifetime DE68911188T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8804682A FR2629931B1 (fr) 1988-04-08 1988-04-08 Correlateur numerique asynchrone et demodulateurs comportant un tel correlateur

Publications (2)

Publication Number Publication Date
DE68911188D1 DE68911188D1 (de) 1994-01-20
DE68911188T2 true DE68911188T2 (de) 1994-04-07

Family

ID=9365128

Family Applications (1)

Application Number Title Priority Date Filing Date
DE89400918T Expired - Lifetime DE68911188T2 (de) 1988-04-08 1989-04-04 Asynchroner digitaler Korrelator und diesen Korrelator enthaltende Demodulatoren.

Country Status (4)

Country Link
US (1) US4933952A (de)
EP (1) EP0336832B1 (de)
DE (1) DE68911188T2 (de)
FR (1) FR2629931B1 (de)

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Also Published As

Publication number Publication date
EP0336832A1 (de) 1989-10-11
US4933952A (en) 1990-06-12
DE68911188D1 (de) 1994-01-20
FR2629931B1 (fr) 1991-01-25
FR2629931A1 (fr) 1989-10-13
EP0336832B1 (de) 1993-12-08

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Legal Events

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8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee