Patent application number | Description | Published |
20090135060 | GPS System Utilizing Multiple Antennas - A GPS Mobile Unit is described. The GPS Mobile Unit may include at least two antennas, at least two GPS receivers, and a position solution module in signal communication with the at least two GPS receivers. | 05-28-2009 |
20090322604 | Method and Apparatus for Mitigating the Effects of Cross Correlation in a GPS Receiver - A positioning system receiver that mitigates cross correlation of received signals from positioning system satellite vehicles by generating the strong satellite vehicle signal and subtracting it from the received signal before correlation while eliminating the need for cross correlation signature without changing the C/A code. | 12-31-2009 |
20090323779 | Method and Apparatus for Mitigating the Effects of Narrowband Interfering Signals in a GPS Receiver - A positioning system receiver that mitigates narrowband interference by dynamically choosing the mitigation technique that yields the best interference mitigation capability with the least signal degradation to maximize receiver performance parameters such as receiver sensitivity, multipath resolution, and low power. | 12-31-2009 |
20090323780 | Method and Apparatus for Mitigating the Effects of CW Interference Via Post Correlation Processing in a GPS Receiver - A positioning system receiver that mitigates the effect of continuous wave (CW) carrier interference with post correlation processing in a satellite positioning receiver, while not distorting the signal waveform or degrading receiver sensitivity and performing in low signal and dynamic interference environments. | 12-31-2009 |
20100134349 | SYSTEM AND METHOD FOR ENHANCED DATA DECODE IN A GPS RECEIVER - Systems and methods are disclosed herein for improving the sensitivity of satellite data decode in a satellite navigation receiver. The low signal ephemeris data decoding system of the present disclosure achieves a 5 db improvement in decoding sensitivity over conventional system by operating down to a CN0 of 21 dB-Hz. The improved sensitivity is achieved through a combination of reducing the number of data bits to be decoded, overcoming the inherent differential decoding problem of an all data bit polarity inversion, improving the probability of seeing single bit decoding error in an ephemeris word, running the parity correction algorithm, and reducing the undetected word error rate. The improved sensitivity makes it possible to predict the orbit of the satellite and to determine the receiver's location with higher accuracy even when operating in challenging signal conditions. | 06-03-2010 |
20100134354 | Method and Apparatus for a GPS Receiver Capable or Reception of GPS Signals and Binary Offset Carrier Signals - A system and method capable of mitigating the migration from the current GPS system to the Galileo system and allow a single satellite system positioning receiver to process both GPS signals and Galileo signals. | 06-03-2010 |
20110037650 | METHOD AND APPARATUS FOR REDUCING POWER CONSUMPTION IN GNSS RECEIVERS - Systems and methods are disclosed herein to use what is referred to as adaptive continuous tracking (ACT) to reduce the power consumption of GNSS receivers. In GNSS receivers, performance as measured by position accuracy is a function of the observation time of the satellites. A longer observation time translates into more reliable range measurements and demodulated data, and ultimately into better positioning accuracy of the receivers. However, a longer observation time also means more power consumption. ACT allows satellite observation time to be tuned to the desired positioning performance by dynamically adjusting the on time period of the receivers while maintaining a minimum performance metric. The performance metric may be formed from a combination of the estimated position error, the horizontal dilution of precision (HDOP), the data collection state, and the receiver operating environment as characterized by the carrier to noise ratio (CN0). ACT cyclically switches on/off the radio frequency (RF) front-end and also cyclically enables/disables the baseband hardware of the receivers to reduce power consumption while allowing the receivers to meet the minimum performance metric and ensuring continuous satellite tracking, continuous positioning fix operation, multiplexed GNSS operation, and continuous data collection. | 02-17-2011 |
20110193742 | Method and Apparatus for Weak Data Frame Sync in a Positioning System - The present invention is related to location positioning systems, and more particularly, to a method and apparatus of synchronizing to data frames in a positioning system signal. According to one aspect, the invention speeds up the frame synchronization process by computing a frame synchronization metric for each satellite and then combining together the metrics for all tracked satellites together, after compensating for respective signal transit times. Then the invention makes a frame sync decision on the combined satellite metric. In embodiments, an optimal combining algorithm is used based on CNO of each satellite. According to further aspects, the invention further speeds up the frame synchronization process by predicting many bits in the subframe so that more bits are known in addition to the 8-bit preamble. For example, the invention recognizes that many bits in a subframe rarely change or don't change very often. Moreover, the invention uses old ephemeris used to predict new ephemeris parameters. These parameters are translated into predicted bits in the signal. Still further, old ephemeris can be used to predict almanac parameters, and the almanac can be used to predict ephemeris parameters. | 08-11-2011 |
20110279318 | METHOD AND APPARATUS FOR A GPS RECEIVER CAPABLE OF RECEPTION OF GPS SIGNALS AND BINARY OFFSET CARRIER SIGNALS - A system and method capable of mitigating the migration from the current GPS system to the Galileo system and allow a single satellite system positioning receiver to process both GPS signals and Galileo signals. | 11-17-2011 |
20120299771 | Method and Apparatus for Weak Data Bit Sync in a Positioning System - The present invention is related to location positioning systems, and more particularly, to a method and apparatus of synchronizing to data bits in a positioning system signal. According to a first aspect, the present invention speeds up data bit sync by allowing high Pfa in the overall bit sync computation (e.g. 10 | 11-29-2012 |
20130027245 | MITIGATING MULTIPATH USING STATE TRANSITION DETECTION AND MEASUREMENT - A global positioning satellite (GPS) receiver that includes a radio frequency (RF) receiver receiving a first GPS signal from a GPS satellite and a processor. The processor is configured to correlate the first GPS signal with a plurality of reference signals to produce a plurality of correlations, detect a transition between receiving the first GPS signal and receiving a second GPS signal from the GPS satellite based on a phase shift in the correlations, and if the transition is detected, compensate for the phase shift when computing a range to the GPS satellite. | 01-31-2013 |
20130169476 | Method and Apparatus for Managing and Configuring Tracker Components for Enhanced Sensitivity Tracking of GNSS Signals - The present invention is related to location positioning systems, and more particularly, to a method and apparatus for making accuracy improvements to a GPS receiver's navigation calculations. According to a first aspect, the invention provides an extreme sensitivity GNSS tracking architecture. According to other aspects, the architecture includes multiple loops per channel, with the loops implemented with hardware and/or software. According to still further aspects, the architecture includes a multi-level lock detection algorithm designed to provide a trade-off between sensitivity and speed that is not possible with existing tracking architectures. | 07-04-2013 |
20130169479 | Method and Apparatus for Managing Tracking Loops For Enhanced Sensitivity Tracking of GNSS Signals - The present invention is related to location positioning systems, and more particularly, to a method and apparatus for making accuracy improvements to a GPS receiver's navigation calculations. According to a first aspect, the invention includes extreme sensitivity GNSS tracking loops. In embodiments, the tracking loops are self-bandwidth normalizing and the loop bandwidths automatically narrow with reduced CNO. | 07-04-2013 |
20140132446 | METHOD AND APPARATUS FOR DETECTING CROSS CORRELATION BASED IN LIMITED RANGE CODE PHASE OFFSET OBSERVATIONS - Apparatus and a method identify and eliminate false satellite signals that are cross correlation signals without prior knowledge of any possibly interfering strong satellite signals. The disclosed method analyzes a small number of code phase offsets relative to a threshold value based on the detected peak of a weak satellite signal to determine if the weak satellite signal is not a true satellite autocorrelation signal but a cross-correlation signal. The number of code phase offsets and the threshold value may be determined based on the signal-to-noise ratio of the detected weak satellite signal. | 05-15-2014 |
20140333477 | METHOD, APPARATUS AND SYSTEM FOR REDUCING POWER CONSUMPTION IN GNSS RECEIVERS - Inventive aspects include a method, apparatus, and system for reducing power consumption in GNSS receivers. Such may include receiving timing and accuracy parameters, processing pre-positioning information in preparation for signal acquisition or signal track, determining whether a plurality of satellites are in-view, applying an ON signal to one or more components of an analog signal processing section and to one or more components of a digital signal processing section, and within a dynamic time window, acquiring signals of the plurality of in-view satellites and simultaneously applying, in real-time, signal sensing logic to the acquired signals, until determining that a position fix of the electronic receiver is obtained. Responsive to the determination that the position fix is obtained, an OFF signal may be applied to the one or more components of the analog signal processing section and to the one or more components of the digital signal processing section. | 11-13-2014 |
20140354472 | METHOD AND APPARATUS FOR EFFICIENTLY COMBINING SATELLITE NAVIGATION SIGNALS - A satellite signal navigation receiver can reduce channel resource usage and matched filter requirements by producing a single-bit local replica code from the combined incoming signals of each in view satellite. In one embodiment, the E | 12-04-2014 |
20140368379 | RECEIVER FOR SIMULTANEOUS RECEPTION OF SIGNALS FROM MULTIPLE GNSS SATELLITE SYSTEMS - A method, receiver, and mobile terminal for simultaneously receiving and processing signals of multiple satellites from a plurality of navigational satellite system constellations are described. In the method, satellite signals from a plurality of navigational satellite systems are translated into an intermediate frequency and converted from analog to digital together, but then are separated out according to each navigational satellite system in the digital domain. | 12-18-2014 |
20150032365 | SYSTEM, METHOD, AND APPARATUS FOR MINIMIZING POWER CONSUMPTION IN A PORTABLE DEVICE CAPABLE OF RECEIVING SATELLITE NAVIGATIONAL SYSTEM SIGNALS - Methods, systems, and portable devices which reduce the power used by a portable device to receive/process satellite navigational system signals and/or to compute the portable device's position using satellite navigational system signals are provided. A method includes retrieving information concerning power usage characteristics based on aggregate data corresponding to a current location of the portable device; and selecting a power saving mode based on the retrieved power usage information from the aggregate data, where each of the plurality of power saving modes reduces power usage in at least one of receiving the satellite navigational system signals, processing the satellite navigational system signals, and computing the portable device's position using the satellite navigational system signals. | 01-29-2015 |
20150054680 | METHOD AND APPARATUS FOR REDUCING MEMORY AND COMMUNICATIONS BANDWIDTH REQUIREMENTS IN GNSS RECEIVERS - A method, apparatus, and system for reducing memory and communication bandwidth requirements for digital signal samples in Global Navigational Satellite System (GNSS) receivers using an adaptive compression/decompression process are described. | 02-26-2015 |