Patent application number | Description | Published |
20090156205 | Method and Apparatus for Establishing a Wireless Network Signal Acquisition Rate - Methods and apparatuses are provided for use by, or use with or in, a portable wireless device that allow for a wireless network signal acquisition rate to based, at least in part, on movement data associated with the portable wireless device. | 06-18-2009 |
20090274079 | Radio Frequency (RF) Signal Multiplexing - In a radio frequency (RF) receiver, a receiver RF chain is tuned to a first (e.g., global positioning system (GPS)) channel to permit receipt of a first (e.g., GPS) signal over the first (e.g., GPS) channel on the receiver RF chain during a first time duration. The receiver RF chain is tuned to a second (e.g., cellular page) channel to permit receipt of a second (e.g., cellular page) signal over the second (e.g., cellular page) channel on the receiver RF chain during a second time duration, following the first time duration. The first (e.g., GPS) signal is processed during the first time duration and the second time duration, without any apparent interruption of the first (e.g., GPS) signal during the second time duration. The processing, for example, treats the actual interruption as a temporary, short term fade of the first (e.g., GPS) signal during the second time duration, or provides a bridge signal (e.g., an estimated GPS signal on the receiver RF chain or an actual GPS signal received on another receiver RF chain) during the second time duration. | 11-05-2009 |
20100099375 | MOBILE RECEIVER WITH LOCATION SERVICES CAPABILITY - The subject matter disclosed herein relates to a receiver that is capable of processing signals which are transmitted according to one or more wireless communication protocols. Such a receiver may have sufficient resources to obtain acquisition information from a signal transmitted according to at least one of the wireless communication protocols during an acquisition period and for the purpose of obtaining an estimate of a location of the receiver. | 04-22-2010 |
20100117884 | METHOD FOR PERFORMING CONSISTENCY CHECKS FOR MULTIPLE SIGNALS RECEIVED FROM A TRANSMITTER - The subject matter disclosed herein relates to a system and method for processing multiple navigation signal components received from multiple global navigation satellite systems (GNSS′). In a particular implementation, an energy detection in a first navigation signal component is classified based, at least in part, on information in a second navigation signal component. | 05-13-2010 |
20100135365 | METHOD AND APPARATUS FOR MULTIPATH MITIGATION - An apparatus and method for short multipath mitigation. In one aspect the method comprises subtracting a first stronger path from a correlation function to obtain a first residual signal, wherein one component of the first residual signal is a weaker path; applying reconstruction on the first residual signal to obtain a first reconstructed weaker path; subtracting the first reconstructed weaker path from the correlation function to obtain a second residual signal; and applying reconstruction on the second residual signal to obtain a second stronger path. In one aspect, the apparatus includes an antenna for receiving a composite receive RF signal, a receiver front-end for converting the composite receive RF signal into a composite receive digital signal; and a processor for performing signal correlation on the composite receive digital signal to obtain a correlation function and for processing the correlation function to obtain a desired signal. In one aspect, the short multipath is identified by computing a Left Edge Height Ratio Indicator (LEHRI). | 06-03-2010 |
20100141470 | SYSTEMS, METHODS, AND COMPUTER PROGRAM PRODUCTS FOR REFRESHING DATA - A method performs an update for a first device that consumes information with a known expiration time. The first device operates within a network that accommodates other devices also consuming the information. The method includes setting a time for the first device to refresh the information, the time to refresh being based on a pseudorandom time offset. The method also includes sending a refresh request to a resource for the data during the set time. | 06-10-2010 |
20100178934 | ENVIRONMENT-SPECIFIC MEASUREMENT WEIGHTING IN WIRELESS POSITIONING - The subject matter disclosed herein relates to a system and method for estimating a location of a mobile station based, at least in part, on one or more measurements obtained from the mobile station based at least in part on one or more signals received by the mobile station from one or more signal sources. Such measurements may be combined based, at least in part, on estimates of measurement errors associated with the signal sources. In a particular implementation, such error estimates may be updated to account for changes in an operational environment. | 07-15-2010 |
20100279705 | METHODS AND SYSTEMS FOR DERIVING SEED POSITION OF A SUBSCRIBER STATION IN SUPPORT OF UNASSISTED GPS-TYPE POSITION DETERMINATION IN A WIRELESS COMMUNICATION SYSTEM - In a method and system for deriving a seed position of a subscriber station in a wireless communications system in supporting unassisted GPS-type position determination is provided, the subscriber station receives overhead messages from the wireless communications system, and derives the seed position from the parameter values. The subscriber station may use a data structure in its memory and map possible parameter values to corresponding positions that may serve as the seed positions. | 11-04-2010 |
20100279707 | TIME OF ARRIVAL (TOA) ESTIMATION FOR POSITIONING IN A WIRELESS COMMUNICATION NETWORK - Techniques for determining time of arrivals (TOAs) of signals in a wireless communication network are described. Each cell may transmit (i) synchronization signals on a set of contiguous subcarriers in the center portion of the system bandwidth and (ii) reference signals on different sets of non-contiguous subcarriers distributed across the system bandwidth. A UE may determine TOA for a cell based on multiple signals transmitted on different sets of subcarriers. The UE may perform correlation for a first signal (e.g., a synchronization signal) from the cell to obtain first correlation results for different time offsets. The UE may perform correlation for a second signal (e.g., a reference signal) from the cell to obtain second correlation results for different time offsets. The UE may combine the first and second correlation results and may determine the TOA for the cell based on the combined correlation results. | 11-04-2010 |
20100304761 | SENSOR USES IN COMMUNICATION SYSTEMS - Methods and apparatus are directed to mobile devices utilizing motion and/or position sensors for improving operating performance and/or power efficiency. In one example, a method for reducing power consumption in a mobile device includes receiving movement information, establishing movement data based on the movement information, determining if the mobile device is stationary using the movement data; and reducing the frequency of searching for a base station when the mobile device is stationary. In another example, a mobile device which reduces power consumption based upon movement data includes an RF front end, a receiver coupled to the RF front end, a data demodulator coupled to the receiver, a searcher, coupled to the RF front end and the receiver, which searches for base stations, and a processing unit coupled to the searcher, wherein the processing unit controls the searcher based upon the stationarity of the mobile device. | 12-02-2010 |
20100309044 | On Demand Positioning - The subject matter disclosed herein relates to determining a location of a mobile device using more than one location-determining technology. | 12-09-2010 |
20100316095 | SYSTEMS, METHODS, AND APPARATUS FOR JAMMER REJECTION - A method according to an embodiment obtains a list of peaks for each of a number of frequency hypotheses. Each peak has an energy result and corresponds to a code phase hypothesis. Embodiments include methods and apparatus that may be used in identifying a location of a signal (such as a GPS signal) in a two-dimensional search space. Location information may be further applied to operations such as signal acquisition, signal tracking, position location of a receiver, and timing operations such as the synchronization of one or more other processes. | 12-16-2010 |
20100328149 | 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 be terminated in response to a weighting of quantitative assessments of at least some of such pseudorange measurements. | 12-30-2010 |
20100328155 | 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 processing to improve one or more performance metrics related to position estimation operations, for example. | 12-30-2010 |
20100330940 | SENSOR-AIDED WIRELESS COMBINING - An apparatus and method are disclosed for achieving receiver diversity. A wireless unit includes a plurality of antennas, an antenna selector to select one or more antennas from the plurality of antennas, a processor with input data from an inertial sensor for monitoring the orientation of the wireless unit. Based on the input data, the processor commands the antenna selector to select one or more antennas. In some embodiments, the processor is a diversity processor. Based on the input data from the inertial sensor, the diversity processor computes the combination of the received signals. In another aspect, the wireless unit further includes a baseband processor to process the output of the diversity processor for a particular unit application. | 12-30-2010 |
20100331010 | Trajectory-Based Location Determination - The subject matter disclosed herein relates to determining a location of a mobile device using an estimated trajectory of motion of the mobile device, and in particular, using a comparison of the estimated trajectory with one or more predetermined candidate trajectories. | 12-30-2010 |
20110039578 | ASSISTANCE DATA FOR POSITIONING IN MULTIPLE RADIO ACCESS TECHNOLOGIES - An apparatus and method for determining a position of a mobile station based on terrestrial assistance data from a first wireless network to which the mobile station is not attached. That is, the mobile station is able to receive terrestrial assistance from a first wireless network and use the terrestrial assistance data to obtain location information, such as timing measurements, from the first wireless network and determine its position while not attached to the first wireless network. The first wireless network may be a network to which the mobile station is subscribed and can attach. | 02-17-2011 |
20110065457 | TRANSMITTER POSITION INTEGRITY CHECKING - The subject matter disclosed herein relates to determining whether a reported position of a wireless transmitter is sufficiently accurate in accordance with an accuracy metric based at least in part on a calculated range between an estimated position of a mobile station and the reported position and also based at least in part on one or more measurements taken from one or more signals transmitted by the wireless transmitter. | 03-17-2011 |
20110090115 | METHODS AND APPARATUSES FOR RESPONDING TO A REQUEST FOR SATELLITE POSITIONING SYSTEM RELATED INFORMATION ASSOCIATED WITH A MOBILE STATION - Methods and apparatuses are provided which may be enabled within and/or for use with a Satellite Positioning System (SPS) receiver and/or other like apparatuses or device(s) to perform and/or otherwise support certain location sessions. | 04-21-2011 |
20110216811 | METHODS AND APPARATUSES FOR DEMODULATING MULTIPLE CHANNEL SATELLITE POSITIONING SYSTEM SIGNALS - Methods and apparatuses are provided which may be enabled within and/or for use with a Satellite Positioning System (SPS) receiver and/or other like apparatuses or device(s) to demodulate a first channel portion of a multiple channel SPS signal based, at least in part, on a second channel portion of the multiple channel SPS signal. | 09-08-2011 |
20110227787 | ANTI-SPOOFING DETECTION SYSTEM - Spoofing of a satellite positioning system is detected by receiving position location data from multiple sources. The received data is compared and inconsistent data is marked. A position location is estimated based on the received position location data, while accounting for the marked inconsistent data. | 09-22-2011 |
20110279324 | COMPRESSED SENSING FOR NAVIGATION DATA - Methods, apparatuses, and systems are provided for processing positioning signals to obtain navigation information by applying compressed sensing. | 11-17-2011 |
20110298658 | Position Determination Using Measurements From Past And Present Epochs - The subject matter disclosed herein relates to positioning systems and location determination using measurement stitching. | 12-08-2011 |
20120033716 | TIME-SETTING IN SATELLITE POSITIONING SYSTEM RECEIVERS - Techniques are provided which may be implemented using various methods and/or apparatuses in a receiver and/or other like device to determine an SPS time using SPS signals based on a correlation process. A verification process may be performed, for example, that verifies a maximum peak in comparison with other peak information resulting from the correlation process, for example, by considering a ratio of a maximum peak to a next maximum peak. A time-setting algorithm may be selected, for example, based, at least in part, on a time uncertainty and/or on a type of demodulation performed on the SPS signal. The time-setting algorithm may operatively control one or both of the correlation and/verification processes in a desired manner given the time uncertainty and/or type/mode of demodulation performed. | 02-09-2012 |
20120093208 | SELECTIVE COHERENT AND NON-COHERENT DEMODULATION METHODS AND APPARATUSES - Techniques are provided which may be implemented using various methods and/or apparatuses in a receiver of an electronic device to allow for a received signal to be demodulated using both coherent and non-coherent demodulation techniques and for selecting one of the demodulated data signals based, at least in part, on a drift rate measurement of a carrier frequency of the received signal. | 04-19-2012 |
20120154212 | 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 processing to improve one or more performance metrics related to position estimation operations, for example. | 06-21-2012 |