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| Number | Title | Issue Date |
| 8184563 | Selecting a position fix to determine the location of a wireless communication device Different types of position fixes may be used to determine the location of a mobile station in a wireless communication system. The position fixes include terrestrial, or network, based techniques, and non-network based techniques, such as satellite, based technique... | 05/22/2012 |
| 8135097 | Sequential tracking and offline demodulation in receiver An apparatus and method for tracking a desired signal by sequentially tracking the desired signal with a variable integration time, performing automatic frequency control of the desired signal, and demodulating the desired signal using offline software. In one aspec... | 03/13/2012 |
| 8131465 | Motion detection for tracking An apparatus and method for tracking a target wherein a new position fix is taken when the measured movement of the target is more than a predetermined threshold amount or when the position fix has not been updated in a predetermined interval. The apparatus and meth... | 03/06/2012 |
| 8131464 | Transmitter identifier database for enhanced GPS performance A mobile station database of cellular identifications and associated position information is stored in mobile station memory. The mobile station uses the position information in the database to assist in determining a current position for the mobile based on an iden... | 03/06/2012 |
| 8131326 | GPS position tracking method with variable updating rate for power conservation A system and method in which the position update rate is adaptively modified, based on previous position measurements. By adjusting the update rate based on velocity predictions from two or more position fixes, a lower update rate may be used without exceeding the m... | 03/06/2012 |
| 8130145 | Receive diversity in GNSS receivers The subject matter disclosed herein relates to receiving one or more SPS signals at two or more physically separated antennae. In an aspect, signals from the physically separated antennae may be downconverted into complex digital signals that may undergo further pro... | 03/06/2012 |
| 8100004 | Weather prediction system The invention consists of a barometric pressure sensor, coupled to a processor for recording changes in the pressure over time, this is coupled to a GPS device providing an accurate measurement of the altitude which allows for the barometric pressure measurements to... | 01/24/2012 |
| 8006556 | Sensor-based orientation system A method for measuring positional changes of an object, including rotation about any or all of three axes, using linear accelerometers. There is disclosed a method of using a linear accelerometer to integrate two other 3D linear accelerometers in order to measure an... | 08/30/2011 |
| 7978131 | System and/or method for determining sufficiency of pseudorange measurements The subject matter disclosed herein relates to a system and method for determining a sufficiency of measurements for locating positions. In one example, although claimed subject matter is not so limited, a process to improve accuracy of pseudorange measurements may ... | 07/12/2011 |
| 7936227 | Reference oscillator and its use A reference clock circuit (170), has a low-power mode, in which the frequency consumption is reduced, and including an internal counter, accumulating time spent in low-power mode. The circuit includes a crystal resonator (60), an oscillator circuit ( | 05/03/2011 |
| 7911988 | Selecting a navigation solution used in determining the position of a device in a wireless communication system Different types of position solutions may be used to determine the position of a mobile station (104) in a wireless communication system (101). The position solutions include terrestrial, or network (102, 103), based techniques and non-network, ... | 03/22/2011 |
| 7911381 | Virtual real-time clock based on time information from multiple communication systems Method and apparatus to implement a “virtual” real-time clock at a terminal based on time information from multiple communication systems. At least one system (e.g., GPS) provides “absolute” time information for the virtual real-time clock, and at least one ... | 03/22/2011 |
| 7904053 | Method and apparatus for communicating emergency information using wireless devices A method and apparatus for providing emergency notification by a wireless mobile device in response to triggering a sensor. A detection system, which may be located within a vehicle, comprises one or more sensors configured to sense an emergency event and transmit a... | 03/08/2011 |
| 7903719 | Optimal use of resources for signal processors Systems, methods and devices for signal processing are presented. In particular, methods for the detection of signals in CDMA-based systems are presented, together with corresponding devices. These methods provide more efficient use of correlation resources through ... | 03/08/2011 |
| 7893873 | Methods and systems for providing enhanced position location in wireless communications Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g.,... | 02/22/2011 |
| 7876265 | Methods and systems for providing enhanced position location in wireless communications Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g.,... | 01/25/2011 |
| 7843228 | Half bin linear frequency discriminator Frequency discriminator based on a variant of the DFT transform in which the usual twiddle factors are replaced with twiddle factors as for a DFT on a number of points which is the double as the actual number of sample points. The DFT so modified allows half-bin fre... | 11/30/2010 |
| 7839327 | Method and apparatus for processing navigation data in position determination Methods and apparatuses for the processing of false alarms in position determination. At least one embodiment of the present invention estimates and uses measurement false alarm probabilities in the position determination process. In one embodiment, the estimated me... | 11/23/2010 |
| 7826343 | Position location signaling method apparatus and system utilizing orthogonal frequency division multiplexing Position location signaling system, apparatus, and method are disclosed. Position location beacons can each be configured to transmit a frequency interlaced subset of orthogonal frequencies spanning substantially an entire channel bandwidth. The orthogonal frequenci... | 11/02/2010 |
| 7801108 | Methods and apparatuses for using mobile GPS receivers to synchronize basestations in cellular networks Methods and apparatuses for establishing time at a first basestation, and synchronizing the first basestation with other basestations in a cellular network. The method may be performed using a mobile (cellular communication) station that includes a satellite positio... | 09/21/2010 |
| 7792225 | Method and device for reducing cross-correlation false alarms in CDMA and other wireless networks A method and device for combating cross-correlation false alarms by introducing code diversity in the correlation process in which the search code may be diversified by the use of code staggering and/or code scrambling. The energy levels of the signals before and af... | 09/07/2010 |
| 7750846 | Receiver for radio positioning signals A GPS or Galileo receiver for radio positioning signals wherein at least a part of the computing of position related data based on radio signals received from a plurality of space vehicles is carried out by a processor (21) mounted on a graphic or sound card ... | 07/06/2010 |
| 7738531 | Method and apparatus for reducing code phase search space A GPS communication system including a server and a client, each including a GPS receiver, for reducing the code phase search space of the GPS receiver of the client. The communication system includes a transmitter for transmitting timing information from the server... | 06/15/2010 |
| 7729412 | Parameter estimator with dynamically variable integration time A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arriva... | 06/01/2010 |
| 7728684 | Crystal reference clock and radio localization receiver Device and method for temperature compensation in a clock oscillator using quartz crystals, which integrates dual crystal oscillators. The minimal power consumption is achieved through an efficient use of a processor in charge of the synchronization of the two oscil... | 06/01/2010 |
| 7702370 | GPS position tracking method with variable updating rate for power conservation A system and method in which the position update rate is adaptively modified, based on previous position measurements. By adjusting the update rate based on velocity predictions from two or more position fixes, a lower update rate may be used without exceeding the m... | 04/20/2010 |
| 7696905 | Method and apparatus for controlling the operational mode of electronic devices in response to sensed conditions A system is disclosed that senses physical characteristics of an electronic device. The system controls the electronic device in response to the sensed physical characteristics. The system includes a control subsystem. The control subsystem includes a time trigger a... | 04/13/2010 |
| 7664764 | Method and system for storage and fast retrieval of digital terrain model elevations for use in positioning systems Methods and apparatuses to generate and to access compressed and indexed elevations of Digital Elevation Models. In one aspect of the invention, a method to store elevation data includes: compressing elevation data of a first portion of a Digital Elevation Model (DE... | 02/16/2010 |
| 7657230 | Procedure for detecting interfering multi-path condition A method of and system for detecting an interfering multi-path condition is provided. A parameter is determined from a pulse of a correlation function derived from a received signal. The parameter is examined to determine if it is inconsistent with a non-interfering... | 02/02/2010 |
| 7643542 | Fast Fourier Transform (FFT) inter frequency loss mitigation and Global Positioning System (GPS) receiver including it Acquisition method for a localization receiver, in particular for a Global Positioning System (GPS) receiver. It involves the calculation of an interpolated Fast Fourier Transform (FFT) spectrum (S′) of correlated signals in which the frequency lines corresponding... | 01/05/2010 |
| 7580672 | Synthetic path diversity repeater A communication repeater for use in conjunction with a base transceiver subsystem (BTS) of a wireless communication system. The repeater expands the coverage area of the BTS and allows receivers to identify whether the source of a communication signal was directly f... | 08/25/2009 |
| 7580450 | Parameter estimator with dynamically variable integration time A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arriva... | 08/25/2009 |
| 7574195 | Method and apparatus for communicating emergency information using wireless devices A method and apparatus for providing emergency notification by a wireless mobile device in response to triggering a sensor. A detection system, which may be located within a vehicle, comprises one or more sensors configured to sense an emergency event and transmit a... | 08/11/2009 |
| 7533569 | Sensor-based orientation system A method for measuring positional changes of an object, including rotation about any or all of three axes, using linear accelerometers. There is disclosed a method of using a linear accelerometer to integrate two other 3D linear accelerometers in order to measure an... | 05/19/2009 |
| D581299 | Dual transducer cargo sensor device | 11/25/2008 |
