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| Number | Title | Issue Date |
| 8013785 | Positioning system and positioning method It is an object of the present invention to perform positioning at favorable positioning precision and in a favorable positioning time, according to whether a receiver is indoors or outdoors. A positioning server 10 comprises a reception state information acq... | 09/06/2011 |
| 7899467 | Estimating the location of a wireless terminal based on the traits of the multipath components of a signal A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the ... | 03/01/2011 |
| 7848762 | Computationally-efficient estimation of the location of a wireless terminal based on pattern matching A method of using a non-GPS-derived technique to estimate the location of an Assisted-GPS-enabled wireless terminal for the purposes of generating location-specific assistance data for the wireless terminal is disclosed. The wireless terminal then uses the assistanc... | 12/07/2010 |
| 7796966 | Estimating the location of a wireless terminal based on calibrated signal-strength measurements A process and machine for estimating the location of a wireless terminal is disclosed. The illustrative embodiment of the present invention is based on the observation that the signal strength of a signal from a transmitter is different at some locations, and, there... | 09/14/2010 |
| 7753278 | Estimating the location of a wireless terminal based on non-uniform locations A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the ... | 07/13/2010 |
| 7734298 | Estimating the location of a wireless terminal based on signal path impairment A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the ... | 06/08/2010 |
| 7725111 | Location determination using RF fingerprinting A method for determining the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party. The location of a remote MU is determined by comparing a snapshot of a predefined portion of the radio-frequency (RF) spectrum taken b... | 05/25/2010 |
| 7460505 | Location estimation of wireless terminals through pattern matching of signal-strength differentials A method of estimating the location of a wireless terminal is disclosed that is ideally suited for use with legacy systems. The illustrative embodiment of the present invention is based on the observation that the signal strength of a signal from a transmitter is di... | 12/02/2008 |
| 7433695 | Computationally-efficient estimation of the location of a wireless terminal based on pattern matching A method of using a non-GPS-derived technique to estimate the location of an Assisted-GPS-enabled wireless terminal for the purposes of generating location-specific assistance data for the wireless terminal is disclosed. The wireless terminal then uses the assistanc... | 10/07/2008 |
| 7433652 | Electro-magnetic propagation modeling A generalized framework is disclosed in which a wide variety of propagation models can be cast in a matrix-based format using arbitrary matrix coefficients. Casting propagation models in the matrix-based framework enables efficient computer implementation and calcul... | 10/07/2008 |
| 7383051 | Estimating the location of a mobile unit based on the elimination of improbable locations A method for determining the location of a mobile unit (mobile unit) in a wireless communication system is disclosed. The illustrative embodiment provides a computationally-efficient technique for reducing the number of possible positions that have to be analyzed. I... | 06/03/2008 |
| 7257414 | Estimating the Location of a Wireless Terminal Based on Non-Uniform Probabilities of Movement A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the ... | 08/14/2007 |
| 7233799 | Location estimation of wireless terminals based on combinations of signal strength measurements and geometry-of-arrival measurements A method and apparatus for estimating the location of a wireless terminal are disclosed. The location of the wireless terminal is estimated based on one or more signal strength measurements in conjunction with: (i) one or more angle-of-arrival measurements, (ii) one... | 06/19/2007 |
| 7167714 | Location determination using RF fingerprints A method for determining the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party. The location of a remote MU is determined by comparing a snapshot of a predefined portion of the radio-frequency (RF) spectrum taken b... | 01/23/2007 |
| 7116987 | Location estimation of wireless terminals through pattern matching of deduced and empirical signal-strength measurements A method of estimating the location of a wireless terminal is disclosed. The illustrative embodiment of the present invention is based on the observation that the signal strength of a signal from a transmitter is different at some locations, and, therefore, the loca... | 10/03/2006 |
| 6944465 | Estimating the location of a mobile unit based on the elimination of improbable locations A method for determining the location of a mobile unit (mobile unit) in a wireless communication system is disclosed. The illustrative embodiment provides a computationally-efficient technique for reducing the number of possible positions that have to be analyzed. I... | 09/13/2005 |
| 6782265 | Location determination using RF fingerprinting A method for determining the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party. The location of a remote MU is determined by comparing a snapshot of a predefined portion of the radio-frequency (RF) spectrum taken b... | 08/24/2004 |
