CA2102601A1 - Spread Spectrum Correlator - Google Patents

Spread Spectrum Correlator

Info

Publication number
CA2102601A1
CA2102601A1 CA2102601A CA2102601A CA2102601A1 CA 2102601 A1 CA2102601 A1 CA 2102601A1 CA 2102601 A CA2102601 A CA 2102601A CA 2102601 A CA2102601 A CA 2102601A CA 2102601 A1 CA2102601 A1 CA 2102601A1
Authority
CA
Canada
Prior art keywords
signal
spread spectrum
pseudo
chip
noise
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
CA2102601A
Other languages
French (fr)
Other versions
CA2102601C (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 US07/390,315 priority Critical patent/US5022047A/en
Priority to DE69131866T priority patent/DE69131866T2/en
Priority to KR1019930703360A priority patent/KR100201798B1/en
Priority to ES91910667T priority patent/ES2141708T3/en
Priority to EP91910667A priority patent/EP0583241B1/en
Priority to CA002102601A priority patent/CA2102601C/en
Priority to PCT/US1991/003125 priority patent/WO1992020178A1/en
Priority to DK91910667T priority patent/DK0583241T3/en
Application filed by Individual filed Critical Individual
Priority to AT91910667T priority patent/ATE188076T1/en
Publication of CA2102601A1 publication Critical patent/CA2102601A1/en
Priority to GR20000400470T priority patent/GR3032768T3/en
Application granted granted Critical
Publication of CA2102601C publication Critical patent/CA2102601C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04B1/709—Correlator structure

Abstract

An apparatus for decoding a received spread spectrum signal having a data signal modulated with a pseudo-noise code and transmitted as an RF spread spectrum signal. A first reference register holds a first pseudo-noise signal (22), a second reference register holds s second pseudo-noise signal (25), and a receive-register holds a received spread spectrum signal (27). A first modulo adder (26) adds each chip of the received spread spectrum signal with each respective chip of the first pseudo-noise signal, thereby generating a first plurality of chip- comparison signals. A first summer adds the first plurality of chip-comparison signals, generating a first correlation signal, The comparator compares the correlation signal to an upper-threshold level and a lower-threshold level, and respectively generates a first data-symbol signal or a second data-symbol signal.
CA002102601A 1989-08-07 1991-05-07 Spread spectrum correlator Expired - Fee Related CA2102601C (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US07/390,315 US5022047A (en) 1989-08-07 1989-08-07 Spread spectrum correlator
ES91910667T ES2141708T3 (en) 1989-08-07 1991-05-07 EXTENDED SPECTRUM CORRELATOR.
EP91910667A EP0583241B1 (en) 1989-08-07 1991-05-07 Spread spectrum correlator
CA002102601A CA2102601C (en) 1989-08-07 1991-05-07 Spread spectrum correlator
PCT/US1991/003125 WO1992020178A1 (en) 1989-08-07 1991-05-07 Spread spectrum correlator
AT91910667T ATE188076T1 (en) 1989-08-07 1991-05-07 SPREAD SPECTRUM CORRELATOR
DE69131866T DE69131866T2 (en) 1989-08-07 1991-05-07 SPREAD SPECTRUM CORRELATOR
KR1019930703360A KR100201798B1 (en) 1989-08-07 1991-05-07 Spread spectrum correlator
DK91910667T DK0583241T3 (en) 1989-08-07 1991-05-07 Spread spectrum correlator
GR20000400470T GR3032768T3 (en) 1989-08-07 2000-02-28 Signal transmission and tag power consumption measurement circuit for an inductive reader.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/390,315 US5022047A (en) 1989-08-07 1989-08-07 Spread spectrum correlator
CA002102601A CA2102601C (en) 1989-08-07 1991-05-07 Spread spectrum correlator
PCT/US1991/003125 WO1992020178A1 (en) 1989-08-07 1991-05-07 Spread spectrum correlator

Publications (2)

Publication Number Publication Date
CA2102601A1 true CA2102601A1 (en) 1992-11-08
CA2102601C CA2102601C (en) 2001-01-23

Family

ID=27169536

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002102601A Expired - Fee Related CA2102601C (en) 1989-08-07 1991-05-07 Spread spectrum correlator

Country Status (10)

Country Link
US (1) US5022047A (en)
EP (1) EP0583241B1 (en)
KR (1) KR100201798B1 (en)
AT (1) ATE188076T1 (en)
CA (1) CA2102601C (en)
DE (1) DE69131866T2 (en)
DK (1) DK0583241T3 (en)
ES (1) ES2141708T3 (en)
GR (1) GR3032768T3 (en)
WO (1) WO1992020178A1 (en)

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DE69131866T2 (en) 2000-04-13
CA2102601C (en) 2001-01-23
ATE188076T1 (en) 2000-01-15
GR3032768T3 (en) 2000-06-30
EP0583241A4 (en) 1994-08-31
EP0583241B1 (en) 1999-12-22
DK0583241T3 (en) 2000-04-17
WO1992020178A1 (en) 1992-11-12
DE69131866D1 (en) 2000-01-27
US5022047A (en) 1991-06-04
EP0583241A1 (en) 1994-02-23
ES2141708T3 (en) 2000-04-01
KR100201798B1 (en) 1999-06-15

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