CA2105299A1 - Asymmetric Spread Spectrum Correlator - Google Patents

Asymmetric Spread Spectrum Correlator

Info

Publication number
CA2105299A1
CA2105299A1 CA2105299A CA2105299A CA2105299A1 CA 2105299 A1 CA2105299 A1 CA 2105299A1 CA 2105299 A CA2105299 A CA 2105299A CA 2105299 A CA2105299 A CA 2105299A CA 2105299 A1 CA2105299 A1 CA 2105299A1
Authority
CA
Canada
Prior art keywords
code
generator
reference registers
spread spectrum
count control
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.)
Granted
Application number
CA2105299A
Other languages
French (fr)
Other versions
CA2105299C (en
Inventor
Robert C. Dixon
Jeffrey S. Vanderpool
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.)
Xircom Wireless Inc
Original Assignee
Individual
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 to US07/389,914 priority Critical patent/US5016255A/en
Priority to EP91908521A priority patent/EP0574382A1/en
Priority to PCT/US1991/001540 priority patent/WO1992016064A1/en
Priority to JP3507577A priority patent/JPH06505131A/en
Priority to CA002105299A priority patent/CA2105299C/en
Application filed by Individual filed Critical Individual
Priority claimed from PCT/US1991/001540 external-priority patent/WO1992016064A1/en
Priority to US07/698,450 priority patent/US5396515A/en
Publication of CA2105299A1 publication Critical patent/CA2105299A1/en
Application granted granted Critical
Publication of CA2105299C publication Critical patent/CA2105299C/en
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
    • H04B1/7093—Matched filter type
    • 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
    • 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

Abstract

An apparatus for decoding a spread spectrum signal coded with a pseudonoise code. A count control (30) is coupled to a clock generator (31) which is connected to a code generator (32) and reference registers (33). The code generator (32) is also connected to the reference registers (33). The count control (30) controls the length of the pseudonoise signal chosen by code selector (34) to be detected by the receiver, and sends signals to the code clock generator (31) to cause code generator (32) to output a code of length L to reference registers (33). Count control (30) triggers code clock generator (31), triggering code generator (32) and reference registers (33). The code selection circuit (34) outputs to the code generator (32). A single code may be loaded into the reference registers (33), or the reference registers (33) can be periodically loaded with different codes until a match occurs.
CA002105299A 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator Expired - Lifetime CA2105299C (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US07/389,914 US5016255A (en) 1989-08-07 1989-08-07 Asymmetric spread spectrum correlator
PCT/US1991/001540 WO1992016064A1 (en) 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator
JP3507577A JPH06505131A (en) 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator
CA002105299A CA2105299C (en) 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator
EP91908521A EP0574382A1 (en) 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator
US07/698,450 US5396515A (en) 1989-08-07 1991-05-10 Asymmetric spread spectrum correlator

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/389,914 US5016255A (en) 1989-08-07 1989-08-07 Asymmetric spread spectrum correlator
PCT/US1991/001540 WO1992016064A1 (en) 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator
CA002105299A CA2105299C (en) 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator

Publications (2)

Publication Number Publication Date
CA2105299A1 true CA2105299A1 (en) 1992-09-07
CA2105299C CA2105299C (en) 2000-07-25

Family

ID=25676598

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002105299A Expired - Lifetime CA2105299C (en) 1989-08-07 1991-03-06 Asymmetric spread spectrum correlator

Country Status (4)

Country Link
US (2) US5016255A (en)
EP (1) EP0574382A1 (en)
JP (1) JPH06505131A (en)
CA (1) CA2105299C (en)

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US5396515A (en) 1995-03-07
EP0574382A4 (en) 1994-08-03
US5016255A (en) 1991-05-14
CA2105299C (en) 2000-07-25
EP0574382A1 (en) 1993-12-22
JPH06505131A (en) 1994-06-09

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