| Patent application number | Description | Published |
|---|
| 20090215419 | 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 aspect, the automatic frequency control is performed using the offline software. In one aspect, the desired signal is from a GPS satellite. | 08-27-2009 |
| 20090268788 | SYSTEM AND/OR METHOD FOR DETECTING MULTI-TONE JAMMING - The subject matter disclosed herein relates to a system and method for processing a signal received from a satellite positioning system (SPS) in the presence of a multi-tone jammer. In one particular implementation, processing of a signal may be altered in response to detection of one or more conditions. | 10-29-2009 |
| 20090295631 | APPARATUS AND METHOD FOR CROSS-CORRELATION SPUR MITIGATION - An apparatus and method for cross-correlation spur mitigation comprising choosing from a plurality of peak measurements, a first peak measurement with a first carrier-to-noise density estimate and a first Doppler offset measurement, and a second peak measurement with a second carrier-to-noise density estimate and a second Doppler offset measurement to form a pair; calculating a carrier-to-noise density difference based on the first carrier-to-noise density estimate and the second carrier-to-noise density estimate; calculating a Doppler difference based on the first Doppler offset measurement and the second Doppler offset measurement; comparing the carrier-to-noise density difference to a carrier-to-noise density threshold; and comparing the Doppler difference to at least one Doppler threshold. | 12-03-2009 |
| 20090295632 | Methods and Apparatuses for Processing Satellite Positioning System Signals - Methods and apparatus are provided for use in devices adapted to receive signals from at least one satellite positioning system (SPS). As part of at least one search for a transmission from a space vehicle (SV) associated with the SPS, the methods and apparatuses may correlate a code associated with the SV with a received signal to establish a plurality of correlation values, sample at least a portion of the correlation values during the search, and selectively transitioning the search early or prematurely based, at least in part, on at least one of the sampled correlation values. | 12-03-2009 |
| 20090310654 | MULTIPLE CORRELATION PROCESSING IN CODE SPACE SEARCH - Methods and apparatus for code phase processing in a wireless communication device are described herein. A wireless device performs code phase search on a pseudo random code spread signal received over a wireless channel. A correlator correlates the received signal to a plurality of code phases in each of a plurality of frequency hypothesis. A maximum peak and a second peak are determined from the correlation results. Cross correlation processing is performed on the maximum peak and the maximum peak is discarded in favor of the second peak for position processing based on the results of the cross correlation. | 12-17-2009 |
| 20090316620 | REFERENCE OSCILLATOR MANAGEMENT FOR WIRELESS DEVICES HAVING POSITION DETERMINATION FUNCTIONALITY - A method and device for managing a reference oscillator within a wireless device is presented. The method includes selecting reference oscillator parameters associated with the lowest reference oscillator error, where the selection is based upon reference oscillator parameters derived using different technologies within a wireless device, acquiring a satellite based upon the selected reference parameters, determining the quality of the satellite-based position fix, and updating the reference oscillator parameters based upon the quality of the satellite-based position fix. The wireless device includes a wireless communications system, a satellite positioning system (SPS) receiver, a reference oscillator connected to the wireless communications system and SPS receiver, and a mobile controller connected to the reference oscillator, SPS, and wireless communications system, and a memory connected to the mobile controller, where the memory stores a reference oscillator parameter table and instructions causing the mobile controller to execute the aforementioned method. | 12-24-2009 |
| 20090322596 | Multiple Radio Device Having Adaptable Mode Navigation Radio - Methods and Apparatuses are provided for selectively specifying a mode of operation of a navigation radio within a device based, at least in part, on at least one operative condition associated with at least one other radio within the device. | 12-31-2009 |
| 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 |
| 20100246644 | SYSTEMS, COMPUTER PROGRAM PRODUCTS, AND METHODS USING CARRIER PHASES TO DETECT MULTIPATH SIGNALS - A multipath detector includes an RF module receiving multiple signals, and a correlator module receiving the signals from the RF module. The correlator module correlates the signals to create a composite ACF, and produces samples of the composite autocorrelation function (ACF). The samples are time delayed relative to each other. The multipath detector also includes a carrier phase processor that receives the samples and estimates carrier phases associated with each of the samples. The carrier phase processor employs the estimated carrier phases to determine if one of the signals is subject to a multipath delay. | 09-30-2010 |
| 20100296551 | TIMING SIGNAL FREQUENCY MANAGEMENT METHODS AND APPARATUSES - Methods and apparatus are provided for use in devices operatively enabled to establish timing signal offset data and/or utilize such established offset data. | 11-25-2010 |
| 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 |
| 20100329312 | Wideband Correlation Mode Switching Methods And Apparatuses - Methods and apparatus are provided for use in devices operatively enabled to perform waveform correlation result processing. | 12-30-2010 |
| 20110142100 | METHODS AND APPARATUSES FOR IDENTIFYING AND MITIGATING INTERFERENCE IN A WIRELESS SIGNAL - Methods and apparatuses are provided that may be implemented in various electronic devices and/or circuits to identify and mitigate to some extent various known and unknown interference signals that may appear in a received signal. | 06-16-2011 |
