WO2004036924A3 - Enhancing the accuracy of a location estimate - Google Patents

Enhancing the accuracy of a location estimate Download PDF

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Publication number
WO2004036924A3
WO2004036924A3 PCT/US2003/032584 US0332584W WO2004036924A3 WO 2004036924 A3 WO2004036924 A3 WO 2004036924A3 US 0332584 W US0332584 W US 0332584W WO 2004036924 A3 WO2004036924 A3 WO 2004036924A3
Authority
WO
WIPO (PCT)
Prior art keywords
location
measurements
accuracy
estimate
emitter
Prior art date
Application number
PCT/US2003/032584
Other languages
French (fr)
Other versions
WO2004036924A2 (en
Inventor
John P Carlson
Martin Alles
Joseph P Kennedy Jr
Thomas B Gravely
Original Assignee
Andrew Corp
John P Carlson
Martin Alles
Joseph P Kennedy Jr
Thomas B Gravely
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 Andrew Corp, John P Carlson, Martin Alles, Joseph P Kennedy Jr, Thomas B Gravely filed Critical Andrew Corp
Priority to US10/531,044 priority Critical patent/US7429951B2/en
Priority to AU2003277379A priority patent/AU2003277379A1/en
Publication of WO2004036924A2 publication Critical patent/WO2004036924A2/en
Publication of WO2004036924A3 publication Critical patent/WO2004036924A3/en
Priority to US12/122,942 priority patent/US7911384B2/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • 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
    • G01S5/0205—Details
    • G01S5/021—Calibration, monitoring or correction
    • 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
    • G01S5/0257—Hybrid positioning
    • G01S5/0268—Hybrid positioning by deriving positions from different combinations of signals or of estimated positions in a single positioning system
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1081—Reduction of multipath noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0891—Space-time diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels

Abstract

A method for enabling a system to enhance the accuracy of a location estimate modifies weights in a weight matrix associated with receiver station measurements in parallel with successive refinements of the location estimate. In a typical location estimation scenario, several receiving stations simultaneously derive measurements of a signal from the emitter. Any one of these measurements is in general some function of the emitter location and the receiving station location. The aggregate of these measurements is often in excess of the minimum number of measurements required to provide an estimate of the emitter location. Where such an excess exists, the method proceeds by modifying the weights (330) associated with the measurements in parallel with successive refinements of the location estimate. The method can be implemented over various cellular protocols with a consistent and significant enhancement in the accuracy of location estimates.
PCT/US2003/032584 2002-10-16 2003-10-16 Enhancing the accuracy of a location estimate WO2004036924A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/531,044 US7429951B2 (en) 2002-10-16 2003-10-16 System and method for enhancing the accuracy of a location estimate
AU2003277379A AU2003277379A1 (en) 2002-10-16 2003-10-16 Enhancing the accuracy of a location estimate
US12/122,942 US7911384B2 (en) 2002-10-16 2008-05-19 System and method for enhancing the accuracy of a location estimate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41834202P 2002-10-16 2002-10-16
US60/418,342 2002-10-16

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/122,942 Continuation US7911384B2 (en) 2002-10-16 2008-05-19 System and method for enhancing the accuracy of a location estimate

Publications (2)

Publication Number Publication Date
WO2004036924A2 WO2004036924A2 (en) 2004-04-29
WO2004036924A3 true WO2004036924A3 (en) 2005-06-30

Family

ID=32107918

Family Applications (5)

Application Number Title Priority Date Filing Date
PCT/US2003/032585 WO2004036525A2 (en) 2002-10-16 2003-10-16 A system and method for estimating the multi-path delays in a signal using a spatially blind antenna array
PCT/US2003/032579 WO2004036935A1 (en) 2002-10-16 2003-10-16 Network overlay location system and method for air interface with frequency hopping
PCT/US2003/032583 WO2004036361A2 (en) 2002-10-16 2003-10-16 Wireless communication network measurement data collection using infrastructure overlay-based handset location systems
PCT/US2003/032578 WO2004036934A1 (en) 2002-10-16 2003-10-16 Network overlay geo-location system with smart antennas
PCT/US2003/032584 WO2004036924A2 (en) 2002-10-16 2003-10-16 Enhancing the accuracy of a location estimate

Family Applications Before (4)

Application Number Title Priority Date Filing Date
PCT/US2003/032585 WO2004036525A2 (en) 2002-10-16 2003-10-16 A system and method for estimating the multi-path delays in a signal using a spatially blind antenna array
PCT/US2003/032579 WO2004036935A1 (en) 2002-10-16 2003-10-16 Network overlay location system and method for air interface with frequency hopping
PCT/US2003/032583 WO2004036361A2 (en) 2002-10-16 2003-10-16 Wireless communication network measurement data collection using infrastructure overlay-based handset location systems
PCT/US2003/032578 WO2004036934A1 (en) 2002-10-16 2003-10-16 Network overlay geo-location system with smart antennas

Country Status (3)

Country Link
US (7) US7200392B2 (en)
AU (5) AU2003277376A1 (en)
WO (5) WO2004036525A2 (en)

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US20060141998A1 (en) 2006-06-29
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