Patents by Inventor Rashidus S. Mia
Rashidus S. Mia 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).
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Patent number: 8315647Abstract: Disclosed is a method for processing readily available radio network, timing and power information about cellular networks and typical measurements made by the mobile device and network. A probabilistic method is disclosed that uses both time (i.e., range) and power differences with known downlink transmitter antenna characteristics to locate mobiles with accuracy better than cell-ID with ranging, with high capacity, and without the need for field calibration.Type: GrantFiled: December 28, 2010Date of Patent: November 20, 2012Assignee: TruePosition, Inc.Inventors: Pitchaiah Soma, Jeffrey F. Bull, Rashidus S. Mia, Pete A. Boyer
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Patent number: 8290496Abstract: For Wireless Communications Networks (WCNs) that support soft handover, cooperator receiver selection for a TDOA, AOA, TDOA/AOA, or hybrid network-based or network-overlay Wireless Location System (WLS) must contend with one or more network base stations as a serving cell. When the active set contains more than one member, two techniques for determining a set of cooperating and demodulating receivers to use in the signal collection for location estimation is disclosed. In one embodiment, the active set members are constructively reduced to a single member that is used as a proxy serving cell. In another embodiment, the information contained in the active set membership is retained and a new set of demodulating and cooperator receivers are generated based on the entire membership of the active set.Type: GrantFiled: December 29, 2009Date of Patent: October 16, 2012Assignee: TruePosition, Inc.Inventors: Edward Joseph Segall, Simon Issakov, Rashidus S. Mia
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Patent number: 8242959Abstract: In an overlay, U-TDOA-based, Wireless Location System, LMUs typically co-located with BTSs, are used to collect radio signaling both in the forward and reverse channels. Techniques are used to compensate for sparse LMU deployments where sections of the U-TDOA service area are uplink demodulation or downlink beacon discovery limited.Type: GrantFiled: April 18, 2007Date of Patent: August 14, 2012Assignee: TruePosition, Inc.Inventors: Rashidus S. Mia, Robert J. Anderson
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Publication number: 20120165038Abstract: Disclosed is a method for processing readily available radio network, timing and power information about cellular networks and typical measurements made by the mobile device and network. A probabilistic method is disclosed that uses both time (i.e., range) and power differences with known downlink transmitter antenna characteristics to locate mobiles with accuracy better than cell-ID with ranging, with high capacity, and without the need for field calibration.Type: ApplicationFiled: December 28, 2010Publication date: June 28, 2012Applicant: TruePosition, INC.Inventors: Pitchaiah Soma, Jeffrey F. Bull, Rashidus S. Mia, Pete A. Boyer
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Publication number: 20120154218Abstract: In a wireless location system configured to use a baseline correlation method, an iterative approach to increasing location accuracy is disclosed. The quality of received signals is ordered from highest to lowest and used to calculate an initial location. The initial location is modified using the lower quality signals as constrained by the time and frequency deviation from the initial location and velocity estimate.Type: ApplicationFiled: December 16, 2010Publication date: June 21, 2012Applicant: TRUEPOSITION, INC.Inventors: Rashidus S. Mia, Robert J. Anderson, Pete A. Boyer
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Patent number: 8204511Abstract: In a wireless location system, a method for determining frame and slot timing information for use in receiving an uplink signal from a user equipment (UE) device assigned to an uplink Dedicated Physical Control Channel (DPCCH) includes receiving signals in the uplink DPCCH at a location measurement unit (LMU) of the WLS. The method also includes detecting a predefined bit pattern known to be present in a plurality of predefined slots of the uplink DPCCH. Next, the frame and slot timing information are determined for the uplink DPCCH based on the detected bit pattern. Finally, the frame and slot timing information is used for collecting uplink signals from the UE for use in location processing.Type: GrantFiled: June 29, 2011Date of Patent: June 19, 2012Assignee: TruePosition, Inc.Inventor: Rashidus S. Mia
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Patent number: 8200239Abstract: Location of small, consumer deployed femto-cells cannot be determined by the usual site survey methods. Location of attached mobiles allows for a proxy location of the femto-cell that can then be used for wireless network planning including the provisioning of a calculated default emergency services location for the femto-cell.Type: GrantFiled: November 11, 2008Date of Patent: June 12, 2012Assignee: TruePosition, Inc.Inventors: Rashidus S. Mia, Robert J. Anderson, Matthew L. Ward
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Patent number: 8199050Abstract: A method and apparatus for position determination is provided using measurements from both Global Positioning System (GPS) receivers and terrestrial-based Uplink Time Difference of Arrival (UTDOA) receivers. The method involves the transformation of downlink satellite measurements into equivalent UTDOA measurements by computing comparable cross-correlation coefficients and time differences of arrival with respect to a UTDOA reference station. The method includes a weighting operation whereby the relative weights of the UTDOA measurements and the relative weights of the GPS measurements are adjusted based on a theoretical scaling followed by empirical adjustments. The method further involves the efficient computation and combining of metrics that are used to minimize the weighted error between candidate location solutions and the UTDOA and GPS measurements.Type: GrantFiled: September 22, 2011Date of Patent: June 12, 2012Assignee: TruePosition, Inc.Inventors: Pete A. Boyer, Ronald Lefever, Rashidus S. Mia, Robert J. Anderson
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Patent number: 8180368Abstract: Illustrative embodiments of the inventive subject matter described herein include, but are not limited to, the following: a femto-cell device, methods for use by a wireless location system (WLS) in locating a femto-cell device, and a wireless location system having certain features relating to the location of femto-cell devices. A femto-cell device used in a wireless communications system (WCS) includes a location subsystem configured to acquire information identifying the geographic location of the femto-cell device. The device also includes an antenna subsystem, a radio frequency (RF) block coupled to the antenna subsystem, a baseband block coupled to the RF block, and a communications block coupled to the baseband block. In addition, the device is configured to communicate with the WCS, including communicating at least some of the location information to the WCS.Type: GrantFiled: November 11, 2008Date of Patent: May 15, 2012Assignee: TruePosition, Inc.Inventors: Robert J. Anderson, Rashidus S. Mia, Matthew L. Ward
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Publication number: 20120082255Abstract: One embodiment takes the form of a system for locating wireless transmitters employing an Orthogonal Frequency Division Multiplexing (OFDM) digital modulation scheme, which comprises transmitting signal components over narrowband frequency channels spanning a wideband channel. The system includes a first receiving system configured to receive a fraction of the signal components transmitted by a first wireless transmitter to be located in a fraction of the narrowband frequency channels, and to process the fraction of the signal components to derive location related measurements. The system further includes at least a second receiving system configured to receive the fraction of the signal components transmitted by the first wireless transmitter, and to process this fraction of the signal components to derive location related measurements.Type: ApplicationFiled: December 13, 2011Publication date: April 5, 2012Applicant: TRUEPOSITION, INC.Inventors: Robert J. Anderson, Rashidus S. Mia
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Patent number: 8145238Abstract: One illustrative embodiment takes the form of a system for locating wireless transmitters employing an Orthogonal Frequency Division Multiplexing (OFDM) digital modulation scheme. The OFDM scheme comprises transmitting signal components over narrowband frequency channels spanning a wideband channel. The system includes a first receiving system configured to receive a fraction of the signal components transmitted by a first wireless transmitter to be located in a fraction of the narrowband frequency channels, and to process the fraction of the signal components to derive location related measurements. The system further includes at least a second receiving system configured to receive the fraction of the signal components transmitted by the first wireless transmitter, and to process this fraction of the signal components to derive location related measurements.Type: GrantFiled: October 21, 2010Date of Patent: March 27, 2012Assignee: TruePosition, Inc.Inventors: Robert J. Anderson, Rashidus S. Mia
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Patent number: 8138976Abstract: A method for improving the results of radio location systems that incorporate weighted least squares optimization generalizes the weighted least squares method by using maximum a posteriori (MAP) probability metrics to incorporate characteristics of the specific positioning problem (e.g., UTDOA). Weighted least squares methods are typically used by TDOA and related location systems including TDOA/AOA and TDOA/GPS hybrid systems. The incorporated characteristics include empirical information about TDOA errors and the probability distribution of the mobile position relative to other network elements. A technique is provided for modeling the TDOA error distribution and the a priori mobile position. A method for computing a MAP decision metric is provided using the new probability distribution models. Testing with field data shows that this method yields significant improvement over existing weighted least squares methods.Type: GrantFiled: April 14, 2011Date of Patent: March 20, 2012Assignee: TruePosition, Inc.Inventors: Pete A. Boyer, Rashidus S. Mia, Edward Joseph Segall
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Patent number: 8140092Abstract: In an overlay, U-TDOA-based, Wireless Location System, LMUs typically co-located with BTSs, are used to collect radio signaling both in the forward and reverse channels. Techniques are used to compensate for sparse LMU deployments where sections of the U-TDOA service area are uplink demodulation or downlink beacon discovery limited.Type: GrantFiled: April 18, 2007Date of Patent: March 20, 2012Assignee: TruePosition, Inc.Inventors: Rashidus S. Mia, Ronald Lefever, Robert J. Anderson
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Publication number: 20120052835Abstract: A large volume of high accuracy location data is determined in many commercial wireless networks from location based services (LBS) and, in the United States, for E911. Uplink-Time-Difference-of-Arrival (UTDOA) and Assisted GPS (AGPS) are the predominant geolocation technologies providing these high accuracy locations. In the US alone over 10 million wireless subscribers are located every month because they dial the national emergency number “911” on their mobile phones. This rich set of location data provides an a priori distribution of the location of subscribers in the wireless network. All digital wireless communications networks have a mechanism for the subscribers to time synchronize their handsets to the network. This mechanism provides a band of ranges from the serving cell site to the handset. An a posteriori location estimate can be determined very quickly by considering the a priori distribution of callers in the range band that the current subscriber is in.Type: ApplicationFiled: August 27, 2010Publication date: March 1, 2012Applicant: TRUEPOSITION, INC.Inventors: Jeffrey F. Bull, Rashidus S. Mia, Robert J. Anderson
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Patent number: 8116784Abstract: In a wireless location system, a method for determining frame and slot timing information for use in receiving an uplink signal from a user equipment (UE) device assigned to an uplink Dedicated Physical Control Channel (DPCCH) includes receiving signals in the uplink DPCCH at a location measurement unit (LMU) of the WLS. The method also includes detecting a predefined bit pattern known to be present in a plurality of predefined slots of the uplink DPCCH. Next, the frame and slot timing information are determined for the uplink DPCCH based on the detected bit pattern. Finally, the frame and slot timing information is used for collecting uplink signals from the UE for use in location processing.Type: GrantFiled: December 13, 2007Date of Patent: February 14, 2012Assignee: TruePosition, Inc.Inventor: Rashidus S. Mia
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Publication number: 20120020320Abstract: In an overlay, network-based, wireless location system, LMUs typically co-located with BTSs are used to collect radio signaling both in the forward and reverse channels for use in TDOA and/or AOA positioning methods. Information broadcast from the radio network and by global satellite navigation system constellations can be received by the LMU and used to reduce the difficulty of initial system configuration and reconfiguration due to radio network changes.Type: ApplicationFiled: July 23, 2010Publication date: January 26, 2012Applicant: TRUEPOSITION, INC.Inventors: Simon Issakov, Rashidus S. Mia, Robert J. Anderson
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Publication number: 20120015670Abstract: A method and apparatus for position determination is provided using measurements from both Global Positioning System (GPS) receivers and terrestrial-based Uplink Time Difference of Arrival (UTDOA) receivers. The method involves the transformation of downlink satellite measurements into equivalent UTDOA measurements by computing comparable cross-correlation coefficients and time differences of arrival with respect to a UTDOA reference station. The method includes a weighting operation whereby the relative weights of the UTDOA measurements and the relative weights of the GPS measurements are adjusted based on a theoretical scaling followed by empirical adjustments. The method further involves the efficient computation and combining of metrics that are used to minimize the weighted error between candidate location solutions and the UTDOA and GPS measurements.Type: ApplicationFiled: September 22, 2011Publication date: January 19, 2012Applicant: TruePosition, Inc.Inventors: Pete A. Boyer, Ronald LeFever, Rashidus S. Mia, Robert J. Anderson
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Patent number: 8059028Abstract: A method and apparatus for position determination is provided using measurements from both Global Positioning System (GPS) receivers and terrestrial-based Uplink Time Difference of Arrival (UTDOA) receivers. The method involves the transformation of downlink satellite measurements into equivalent UTDOA measurements by computing comparable cross-correlation coefficients and time differences of arrival with respect to a UTDOA reference station. The method includes a weighting operation whereby the relative weights of the UTDOA measurements and the relative weights of the GPS measurements are adjusted based on a theoretical scaling followed by empirical adjustments. The method further involves the efficient computation and combining of metrics that are used to minimize the weighted error between candidate location solutions and the UTDOA and GPS measurements.Type: GrantFiled: August 14, 2008Date of Patent: November 15, 2011Assignee: TruePosition, Inc.Inventors: Pete A. Boyer, Ronald LeFever, Rashidus S. Mia, Robert J. Anderson
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Patent number: 8045506Abstract: In an overlay, U-TDOA-based, Wireless Location System, LMUs typically co-located with BTSs, are used to collect radio signaling both in the forward and reverse channels. Techniques are used to compensate for sparse LMU deployments where sections of the U-TDOA service area are uplink demodulation or downlink beacon discovery limited.Type: GrantFiled: April 18, 2007Date of Patent: October 25, 2011Assignee: TruePosition, Inc.Inventors: Rashidus S. Mia, Ronald Lefever, Robert J. Anderson
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Publication number: 20110256887Abstract: In a wireless location system, a method for determining frame and slot timing information for use in receiving an uplink signal from a user equipment (UE) device assigned to an uplink Dedicated Physical Control Channel (DPCCH) includes receiving signals in the uplink DPCCH at a location measurement unit (LMU) of the WLS. The method also includes detecting a predefined bit pattern known to be present in a plurality of predefined slots of the uplink DPCCH. Next, the frame and slot timing information are determined for the uplink DPCCH based on the detected bit pattern. Finally, the frame and slot timing information is used for collecting uplink signals from the UE for use in location processing.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Applicant: TRUEPOSITION, INC.Inventor: Rashidus S. Mia