Patents by Inventor Kaveh Pahlavan

Kaveh Pahlavan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7551929
    Abstract: A method for estimating the speed and bearing of a Wi-Fi enabled device using WLAN radio signals in a WLAN based location service is provided. A method used to estimate a speed of travel of a Wi-Fi enabled device comprises the Wi-Fi enabled device receiving signals transmitted by Wi-Fi access points in range of the Wi-Fi enabled device, and using the signals to estimate the speed of and/or direction of travel of the Wi-Fi enabled device.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: June 23, 2009
    Assignee: Skyhook Wireless, Inc.
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan, Edward J. Morgan
  • Patent number: 7551579
    Abstract: Methods and systems for classifying WLAN access points according to the quality of estimation of characteristics of the WLAN access points are provided. The classifications may be used to scale a reference database and quantify an expected error of estimation of the characteristics of the access points. WLAN access points may be classified based on their impact on a user's position, speed of travel, and direction of travel estimation accuracy in a WLAN positioning system. A method for determining a quality of estimation of characteristics of a Wi-Fi access point comprises a Wi-Fi enabled scanning device measuring a number of received signal strength (RSS) samples of the Wi-Fi signal transmitted by the Wi-Fi access point. A total distance traveled by the Wi-Fi enabled scanning device while measuring the number of RSS samples is estimated and used to estimate the quality of estimation of characteristics of the Wi-Fi access point.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: June 23, 2009
    Assignee: Skyhook Wireless, Inc.
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan, Nicolas Brachet
  • Publication number: 20090154371
    Abstract: A method for estimating position using WLAN access point radio propagation characteristics in a WLAN location based service is provided. A location-based services system has a plurality of Wi-Fi access points in a target area. The Wi-Fi access points are positioned at geographic locations and have signal coverage areas. A method of characterizing at least one of the Wi-Fi access points comprises determining the geographic location of the Wi-Fi access point, dividing the signal coverage area of the Wi-Fi access point into at least one section, and determining radio propagation characteristics for each section. The radio propagation characteristics of each section characterize a radio channel of the Wi-Fi access point, and the characterization can be used in a location algorithm.
    Type: Application
    Filed: February 25, 2009
    Publication date: June 18, 2009
    Applicant: Skyhook Wireless, Inc.
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan
  • Patent number: 7515578
    Abstract: A method for estimating position using WLAN access point radio propagation characteristics in a WLAN location based service is provided. A location-based services system has a plurality of Wi-Fi access points in a target area. The Wi-Fi access points are positioned at geographic locations and have signal coverage areas. A method of characterizing at least one of the Wi-Fi access points comprises determining the geographic location of the Wi-Fi access point, dividing the signal coverage area of the Wi-Fi access point into at least one section, and determining radio propagation characteristics for each section. The radio propagation characteristics of each section characterize a radio channel of the Wi-Fi access point, and the characterization can be used in a location algorithm.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: April 7, 2009
    Assignee: Skyhook Wireless, Inc.
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan
  • Publication number: 20080232281
    Abstract: Methods and systems for configuring ad-hoc networks, especially a self-configuring wireless sensor networks, are described. The network has an initial number of anchors with known positions that broadcast a signal. The signals are received by distributed nodes whose position is not yet known. The nodes rank the received signal based on a Quality of Link (QoL; received signal strength) and compute a Quality of position Estimate (QoE) for the node. The node with the best QoE is elevated to anchor. This process gradually increases the number of available anchors in the network and hence the position accuracy for additional nodes. The system can be used for geolocation of soldiers in the indoor combat, tracking the location of firefighter and other emergency personnel in rescue missions, etc.
    Type: Application
    Filed: January 22, 2008
    Publication date: September 25, 2008
    Applicant: Worcester Polytechnic Institute
    Inventors: Kaveh Pahlavan, Nayef Al-Sindi, Bardia Alavi
  • Publication number: 20070258420
    Abstract: A method for estimating the speed and bearing of a Wi-Fi enabled device using WLAN radio signals in a WLAN based location service is provided. A method used to estimate a speed of travel of a Wi-Fi enabled device comprises the Wi-Fi enabled device receiving signals transmitted by Wi-Fi access points in range of the Wi-Fi enabled device, and using the signals to estimate the speed of and/or direction of travel of the Wi-Fi enabled device.
    Type: Application
    Filed: May 8, 2006
    Publication date: November 8, 2007
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan, Edward Morgan
  • Publication number: 20070258409
    Abstract: Methods and systems for classifying WLAN access points according to the quality of estimation of characteristics of the WLAN access points are provided. The classifications may be used to scale a reference database and quantify an expected error of estimation of the characteristics of the access points. WLAN access points may be classified based on their impact on a user's position, speed of travel, and direction of travel estimation accuracy in a WLAN positioning system. A method for determining a quality of estimation of characteristics of a Wi-Fi access point comprises a Wi-Fi enabled scanning device measuring a number of received signal strength (RSS) samples of the Wi-Fi signal transmitted by the Wi-Fi access point. A total distance traveled by the Wi-Fi enabled scanning device while measuring the number of RSS samples is estimated and used to estimate the quality of estimation of characteristics of the Wi-Fi access point.
    Type: Application
    Filed: May 8, 2006
    Publication date: November 8, 2007
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan, Nicolas Brachet
  • Publication number: 20070259624
    Abstract: A method for estimating the speed and bearing of a Wi-Fi enabled device using WLAN radio signals in a WLAN based location service is provided. A method used to estimate a speed of travel of a Wi-Fi enabled device comprises the Wi-Fi enabled device receiving signals transmitted by Wi-Fi access points in range of the Wi-Fi enabled device, and using the signals to estimate the speed of and/or direction of travel of the Wi-Fi enabled device.
    Type: Application
    Filed: May 8, 2006
    Publication date: November 8, 2007
    Inventors: Farshid Alizadeh-Shabdiz, Edward Morgan, Kaveh Pahlavan
  • Publication number: 20070258421
    Abstract: A method for estimating position using WLAN access point radio propagation characteristics in a WLAN location based service is provided. A location-based services system has a plurality of Wi-Fi access points in a target area. The Wi-Fi access points are positioned at geographic locations and have signal coverage areas. A method of characterizing at least one of the Wi-Fi access points comprises determining the geographic location of the Wi-Fi access point, dividing the signal coverage area of the Wi-Fi access point into at least one section, and determining radio propagation characteristics for each section. The radio propagation characteristics of each section characterize a radio channel of the Wi-Fi access point, and the characterization can be used in a location algorithm.
    Type: Application
    Filed: May 8, 2006
    Publication date: November 8, 2007
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan
  • Publication number: 20070258408
    Abstract: A method for estimating the speed and bearing of a Wi-Fi enabled device using WLAN radio signals in a WLAN based location service is provided. A method used to estimate a speed of travel of a Wi-Fi enabled device comprises the Wi-Fi enabled device receiving signals transmitted by Wi-Fi access points in range of the Wi-Fi enabled device, and using the signals to estimate the speed of and/or direction of travel of the Wi-Fi enabled device.
    Type: Application
    Filed: May 8, 2006
    Publication date: November 8, 2007
    Inventors: Farshid Alizadeh-Shabdiz, Kaveh Pahlavan, Edward Morgan
  • Patent number: 4660213
    Abstract: A signal structure for high speed data communication selects each signal point in the structure to attain a low probability of error in the presence of both additive noise and multiplicative noise. Transmission apparatus for practice of the invention employs an encoder which responds to digital data to produce a QAM signal having parameters selected according to the new signal structure, and receiving apparatus employs a decoder which converts a received QAM signal to digital values according to the same structure.
    Type: Grant
    Filed: November 22, 1983
    Date of Patent: April 21, 1987
    Assignee: Infinet, Inc.
    Inventors: Jerry L. Holsinger, Charamporn Jotikasthira, Kaveh Pahlavan
  • Patent number: 4660214
    Abstract: A signal structure for high speed Trellis coded data communications selects each signal point in the structure to attain a low probability of error in the presence of both additive noise and multiplicative noise. Viterbi decoding is modified to take account of the multiplicative noise energy content of the received signal.
    Type: Grant
    Filed: August 1, 1985
    Date of Patent: April 21, 1987
    Assignee: Infinet, Inc.
    Inventors: Kaveh Pahlavan, Jerry L. Holsinger