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| Number | Title | Issue Date |
| 7688882 | Time-tracking for clustered demodulation elements in a spread spectrum system An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, provides advanced control over the time-tracking of demodulation elements when unresolvable multipath situations arise. The apparatus provides merge protection t... | 03/30/2010 |
| 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 |
| 7653157 | Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system A method and apparatus for coordinating the time at which a mobile station performs searches for alternative systems to which a hard handoff will occur. The mobile station receives a command which instructs the mobile station as to when to tune to alternative freque... | 01/26/2010 |
| 7623871 | Position determination for a wireless terminal in a hybrid position determination system Techniques to determine a position estimate for a wireless terminal. An accurate position estimate for the initially obtained (e.g., based on a first (accurate) position determination sub-system). For each of one or more transmitters (e.g., base stations) in a secon... | 11/24/2009 |
| 7546097 | Calibration techniques for frequency synthesizers In one embodiment, this disclosure describes a frequency synthesizer for use in a wireless communication device, or similar device that requires precision frequency synthesis but small amounts of noise. In particular, the frequency synthesizer may include a phase lo... | 06/09/2009 |
| 7522588 | System and method for reference data processing in network assisted position determination A system and method of preprocessing reference data in a reference assisted location technology are disclosed. A plurality of reference stations each provides reference data over a network to a preprocessing. The preprocessor analyzes the data from the multiple refe... | 04/21/2009 |
| 7319876 | System and method for using equipment identity information in providing location services to a wireless communication device A system, apparatus, and method provides location services to a mobile station by employing equipment identity information. In one aspect of the present inventive concept, a location server uses the equipment identity information of a mobile station in order to sele... | 01/15/2008 |
| 7308022 | Parameter estimator configured to distinguish between peaks and sidelobes of correlation function A parameter estimator for estimating one or more parameter(s) from a signal is described. A correlation function is derived from the signal, and the correlation function analyzed to determine if one or more first peak(s) are present, and, if so, distinguishable from... | 12/11/2007 |
| 7302225 | Time acquisition in a wireless position determination system A system and method for providing timing information to a wireless device in a position determination system is disclosed. A wireless device includes a reference signal receiver, a signal processor, a wireless communications transceiver and a GPS receiver. The wirel... | 11/27/2007 |
| 7295808 | Method of and system for calibrating a repeater A method of and system for calibrating a repeater in a wireless communications system are provided. The one or more calibration parameters for the repeater are derived from (a) time measurements derived from one or more signals relayed by the repeater and received a... | 11/13/2007 |
| 7292188 | Apparatus and method for CDMA time pseudolite for repeater identification Apparatus and method for resolving repeater location ambiguities in a CDMA network using a CDMA Time Pseudolite. The CDMA Time Pseudolite includes a CDMA receiver to receive a CDMA signal with an embedded CDMA timing, a baseband processor to extract the CDMA timing ... | 11/06/2007 |
| 7151927 | Quality of phone service system A method for checking the quality of service provided by a base station at a location remote from the base station, including transmitting signals between the base station and a call transceiver at the remote location, analyzing at least some of the signals at the r... | 12/19/2006 |
| 7136652 | System and method for identification of transmitters with limited information A system and method are disclosed by which a base transceiver station (BTS) may be uniquely identified. When attempting to determine the location of a mobile unit using signal from multiple BTSs, it is critical that the BTSs be uniquely identified and their position... | 11/14/2006 |
| 7130642 | Method and apparatus for performing position determination in a wireless communication network with repeaters A method and apparatus to perform position determination in a wireless (e.g., cellular) communication network with repeaters. A signal received by a terminal is initially identified as being from a repeater. A position and a position uncertainty for the identified r... | 10/31/2006 |
| 7127011 | Procedure for jammer detection A method of and system for detecting whether a peak of a correlation function derived from a received signal is due to a jammer. The peak is within a localized portion of the correlation function which has a total number of peaks. In one embodiment, the total number... | 10/24/2006 |
| 7096132 | Procedure for estimating a parameter of a local maxima or minima of a function A method of and system for estimating a parameter of a local maxima or minima of a function. An interpolated local maxima or minima is determined. An interpolation offset is then derived, comprising a deviation between locations of the interpolated and sampled local... | 08/22/2006 |
| 7095813 | System and method for the detection and compensation of radio signal time of arrival errors A system and method to reduce-the effects of TOA errors. A mobile unit, generates a correlation pulse when a signal transmitted from a base station is detected. The transmitted signal may be reflected or defracted such that multipath signals arrive at the mobile uni... | 08/22/2006 |
| 7085537 | System and method for the detection and compensation of radio signal time of arrival errors A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlation pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, c... | 08/01/2006 |
| 6928275 | Method and apparatus for compensating local oscillator frequency error The frequency error of an oscillator is minimized by characterizing the oscillator. A reference signal from an external source containing a minimal frequency error is provided to an electronic device. The external signal is used as a reference frequency to estimate ... | 08/09/2005 |
| 6907238 | Beacon for locating and tracking wireless terminals A method and apparatus to facilitate the locating and tracking of a wireless terminal, which may be advantageously used for E-911 service. The terminal may be directed to transmit a beacon for certain events, such as in connection with a 911 call. The beacon has a s... | 06/14/2005 |
| 6895249 | Method and apparatus for broadcasting position location data in a wireless communication system Techniques to efficiently broadcast position location data (PLD) from a base station to a number of terminals. In one aspect, PLD messages are classified into groups, and each group is broadcast in a different manner. For example, a first group of messages for PLD r... | 05/17/2005 |
| 6862276 | Method and apparatus for a mobile station application to receive and transmit raw packetized data The present invention discloses a method and apparatus for a mobile station application to receive and transmit raw packetized data in a wireless communication system. The present invention includes a mobile station application that creates at least one socket. At l... | 03/01/2005 |
| 6725159 | GPS receiver and method for processing GPS signals A global positioning system (GPS) receiver has first circuitry for receiving and processing pseudorandom sequences transmitted by a number of GPS satellites. The first circuitry is configured to perform conventional correlation operations on the received pseudorando... | 04/20/2004 |
| 6707420 | Method and apparatus for determining location using a coarse position estimate Corrections to a coarse position estimate of the pseudorange receiving device are made based upon knowledge of the amount of error present in inaccurate information (e.g., the old Almanac and/or Ephemeris) used to estimate the coarse position. ... | 03/16/2004 |
