CA2248647C - Voie d'acces a acquisition rapide pour systemes amcr - Google Patents

Voie d'acces a acquisition rapide pour systemes amcr Download PDF

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Publication number
CA2248647C
CA2248647C CA002248647A CA2248647A CA2248647C CA 2248647 C CA2248647 C CA 2248647C CA 002248647 A CA002248647 A CA 002248647A CA 2248647 A CA2248647 A CA 2248647A CA 2248647 C CA2248647 C CA 2248647C
Authority
CA
Canada
Prior art keywords
sequence
signal
frequency
data
code
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 - Fee Related
Application number
CA002248647A
Other languages
English (en)
Other versions
CA2248647A1 (fr
Inventor
Francis D. Natali
John Ohlson
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.)
Alcatel USA Sourcing Inc
Original Assignee
Alcatel USA Sourcing 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
Priority claimed from US08/621,500 external-priority patent/US5696762A/en
Application filed by Alcatel USA Sourcing Inc filed Critical Alcatel USA Sourcing Inc
Publication of CA2248647A1 publication Critical patent/CA2248647A1/fr
Application granted granted Critical
Publication of CA2248647C publication Critical patent/CA2248647C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
    • 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
    • H04B1/7093—Matched filter type
    • H04B2001/70935—Matched filter type using a bank of matched fileters, e.g. Fast Hadamard Transform
    • 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

Abstract

Système de transmission AMCR à spectre étalé dans lequel une station émet un signal bref de synchronisation pour qu'une deuxième station (1) reconnaisse la présence d'un signal, (2) résolve l'incertitude quant à la fréquence, (3) acquière la synchronisation du code d'étalement, (4) acquière la synchronisation de trame et de symboles et (5) démodule les données pouvant contenir l'indicatif de l'usager et d'autres données. La voie d'acquisition rapide comporte un signal de synchronisation de salves incluant une zone d'acquisition pendant laquelle la porteuse est modulée par déplacement de phase par une séquence de pseudo-bruit, une zone de synchronisation pendant laquelle une séquence de synchronisation est ajoutée en mod-2 à la séquence de pseudo-bruit, un élément de la séquence de synchronisation étant égal à une ou deux périodes de la séquence de pseudo-bruit, et une zone de données avec des mots en code orthogonal m-aire ajoutés en mod-2 à la séquence de pseudo-bruit, un élément du mot du code étant égal à une ou plusieurs périodes de la séquence de pseudo-bruit.
CA002248647A 1996-03-25 1997-03-24 Voie d'acces a acquisition rapide pour systemes amcr Expired - Fee Related CA2248647C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/621,500 US5696762A (en) 1996-03-25 1996-03-25 Rapid-acquisition access channel scheme for CDMA systems
US08/621,500 1996-03-25
PCT/US1997/004280 WO1997036383A1 (fr) 1996-03-25 1997-03-24 Voie d'acces a acquisition rapide pour systemes amcr

Publications (2)

Publication Number Publication Date
CA2248647A1 CA2248647A1 (fr) 1997-10-02
CA2248647C true CA2248647C (fr) 2007-05-29

Family

ID=38150780

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002248647A Expired - Fee Related CA2248647C (fr) 1996-03-25 1997-03-24 Voie d'acces a acquisition rapide pour systemes amcr

Country Status (1)

Country Link
CA (1) CA2248647C (fr)

Also Published As

Publication number Publication date
CA2248647A1 (fr) 1997-10-02

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