CA2116127A1 - Method and Apparatus for Canceling Spread-Spectrum Noise - Google Patents

Method and Apparatus for Canceling Spread-Spectrum Noise

Info

Publication number
CA2116127A1
CA2116127A1 CA 2116127 CA2116127A CA2116127A1 CA 2116127 A1 CA2116127 A1 CA 2116127A1 CA 2116127 CA2116127 CA 2116127 CA 2116127 A CA2116127 A CA 2116127A CA 2116127 A1 CA2116127 A1 CA 2116127A1
Authority
CA
Canada
Prior art keywords
signal
received
spread
spectrum
component
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
CA 2116127
Other languages
French (fr)
Other versions
CA2116127C (en
Inventor
Eugene J. Bruckert
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.)
Motorola Solutions 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
Application filed by Individual filed Critical Individual
Publication of CA2116127A1 publication Critical patent/CA2116127A1/en
Application granted granted Critical
Publication of CA2116127C publication Critical patent/CA2116127C/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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B1/71072—Successive interference cancellation
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B2001/71077—Partial interference cancellation

Abstract

A spread-spectrum noise canceller (182) is provided. A
received phase and a received amplitude for a first (216) and a second (236) component of a received spread-spectrum signal (200) is determined. The second component (236) is structurally similar to the first component (216), but differs by being received at a different time, being transmitted along a different path, or having a different phase. In addition, the spread-spectrum signal (200) includes a first and a second known signal. A portion of a spread-spectrum noise signal in the received signal (200) is canceled by generating an estimated signal (270) by spreading (260) the second known signal at the second component received phase (224) with the first known signal at the first component received phase (204) and adjusting a gain (268) of an integrated form of the spread second known signal as a function of the received amplitudes of the first (216) and the second (236) components. Subsequently, the second known signal is processed out of the received spread-spectrum signal (200) by subtracting (166) the estimated signal (270) from a demodulated form (216, 236) of the received spread-spectrum signal (200).
CA002116127A 1992-06-29 1993-06-14 Method and apparatus for canceling spread-spectrum noise Expired - Fee Related CA2116127C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US906,109 1992-06-29
US07/906,109 US5224122A (en) 1992-06-29 1992-06-29 Method and apparatus for canceling spread-spectrum noise

Publications (2)

Publication Number Publication Date
CA2116127A1 true CA2116127A1 (en) 1994-01-06
CA2116127C CA2116127C (en) 1999-03-16

Family

ID=25421948

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002116127A Expired - Fee Related CA2116127C (en) 1992-06-29 1993-06-14 Method and apparatus for canceling spread-spectrum noise

Country Status (12)

Country Link
US (2) US5224122A (en)
JP (1) JP3564129B2 (en)
KR (1) KR960012479B1 (en)
CN (1) CN1052361C (en)
BR (1) BR9305563A (en)
CA (1) CA2116127C (en)
DE (1) DE4392999T1 (en)
FI (1) FI940952A0 (en)
MX (1) MX9303883A (en)
SE (1) SE9400545L (en)
TW (1) TW263632B (en)
WO (1) WO1994000917A1 (en)

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Also Published As

Publication number Publication date
BR9305563A (en) 1995-12-26
FI940952A (en) 1994-02-28
US5325394A (en) 1994-06-28
FI940952A0 (en) 1994-02-28
TW263632B (en) 1995-11-21
CN1082287A (en) 1994-02-16
MX9303883A (en) 1994-01-31
SE9400545L (en) 1994-04-20
JP3564129B2 (en) 2004-09-08
US5224122A (en) 1993-06-29
WO1994000917A1 (en) 1994-01-06
KR960012479B1 (en) 1996-09-20
CN1052361C (en) 2000-05-10
DE4392999T1 (en) 1997-07-31
CA2116127C (en) 1999-03-16
JPH06510415A (en) 1994-11-17
SE9400545D0 (en) 1994-02-18

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