CA2317414A1 - Communications localization system - Google Patents

Communications localization system Download PDF

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Publication number
CA2317414A1
CA2317414A1 CA002317414A CA2317414A CA2317414A1 CA 2317414 A1 CA2317414 A1 CA 2317414A1 CA 002317414 A CA002317414 A CA 002317414A CA 2317414 A CA2317414 A CA 2317414A CA 2317414 A1 CA2317414 A1 CA 2317414A1
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CA
Canada
Prior art keywords
signal
communications
correlation
correlation processing
parameters
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
CA002317414A
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French (fr)
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CA2317414C (en
Inventor
John E. Maloney
James O. Stevenson
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.)
KSI Inc
Original Assignee
Ksi Inc.
John E. Maloney
James O. Stevenson
Muloc Inc.
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26712400&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2317414(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ksi Inc., John E. Maloney, James O. Stevenson, Muloc Inc. filed Critical Ksi Inc.
Publication of CA2317414A1 publication Critical patent/CA2317414A1/en
Application granted granted Critical
Publication of CA2317414C publication Critical patent/CA2317414C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/12—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial

Abstract

Replica correlation processing, and associated representative signal-data reduction and reconstruction techniques, are used to detect signals of interest and obtain robust measures of received-signal parameters, such as time differences of signal arrival and directional angles of arrival, that can be used to estimate the location of a cellularized-communications signal source. The new use in the present invention of signal-correlation processing for locating communications tranmitters. This enables accurate and efficient extraction of parameters for a particular signal even in a frequency band that contains multiple received transmissions, such as occurs with code-division-multiple-access (CDMA) communications. Correlation processing as disclosed herein further enables extended processing integration times to facilitate the effective detection of desired communications-signal effects and replication measurement of their location-related parameters, even for the communications signals modulated to convey voice conversations or those weakened through propagation effects. Using prior, constructed signal replicas in the correlation processing enables elimination of the inter-site communications of the signal representations that support the correlation analyses. Reduced-date representations of the modulated signals for voiced conversation, or for the variable components of data communications, are used to significantly reduce the inter-site communications that support the correlation analyses.
CA002317414A 1997-01-16 1998-01-16 Communications localization system Expired - Lifetime CA2317414C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US3569197P 1997-01-16 1997-01-16
US08/855,589 US6047192A (en) 1996-05-13 1997-05-13 Robust, efficient, localization system
PCT/US1998/000973 WO1998032297A2 (en) 1997-01-16 1998-01-16 Communications localization system

Publications (2)

Publication Number Publication Date
CA2317414A1 true CA2317414A1 (en) 1998-07-23
CA2317414C CA2317414C (en) 2007-10-23

Family

ID=26712400

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002317414A Expired - Lifetime CA2317414C (en) 1997-01-16 1998-01-16 Communications localization system

Country Status (17)

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US (4) US6047192A (en)
EP (1) EP1048179B1 (en)
JP (1) JP4212017B2 (en)
CN (1) CN1149885C (en)
AT (1) ATE270809T1 (en)
AU (1) AU757840B2 (en)
BR (1) BR9814250B1 (en)
CA (1) CA2317414C (en)
DE (1) DE69824973T2 (en)
EA (1) EA200000775A1 (en)
ES (1) ES2227815T3 (en)
IL (1) IL137291A0 (en)
MX (1) MXPA00006951A (en)
NZ (1) NZ505953A (en)
TW (1) TW449661B (en)
WO (1) WO1998032297A2 (en)
ZA (1) ZA98330B (en)

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