Patent application number | Description | Published |
20110237208 | HYBRID PHASE SWEEPING FOR MOBILE TRANSMIT DIVERSITY - An improved method and apparatus for Mobile Transmit Diversity (MTD), or Uplink Transmit Diversity (ULTD) is disclosed. The mobile device either selects the best antenna at any given time, or transmits from both antennas using the best beam forming phase without feedback from the base station on which antenna to transmit from or which phase to use if using two antennas. Essentially operating in Open Loop MTD, a Hybrid Phase Sweeping algorithm requires testing of a fraction of phase hypotheses resulting in improved base station performance and higher data rates for the user. | 09-29-2011 |
20120045024 | METHODS AND APPARATUS FOR ITERATIVE DECODING IN MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEMS - Methods and apparatus for receiving, processing, and decoding MIMO transmissions in communications systems are described. A non-Gaussian approximation method for simplifying processing complexity where summations are used is described. Use of a priori information to facilitate determination of log likelihood ratios (LLRs) in receivers using iterative decoders is further described. A Gaussian or non-Gaussian approximation method using a priori information may be used to determine a K-best list of values for summation to generate an LLR is also described. | 02-23-2012 |
20120182180 | WIDE AREA POSITIONING SYSTEM - Positioning systems and methods comprise a network of transmitters that broadcast positioning signals comprising ranging signals and positioning system information. A ranging signal comprises information used to measure a distance to a transmitter broadcasting the ranging signal. A reference sensor array comprising at least one reference sensor unit is positioned at a known location. A remote receiver includes an atmospheric sensor collecting atmospheric data at a position of the remote receiver. A positioning application is coupled to the remote receiver and generates a reference pressure estimate at the position of the remote receiver using the atmospheric and reference data from the reference sensor array. The positioning application computes the position of the remote receiver using the reference pressure estimate and information derived from at least one of the positioning signals and satellite signals that are signals of a satellite-based positioning system. The position includes an elevation. | 07-19-2012 |
20130169484 | WIDE AREA POSITIONING SYSTEMS AND METHODS - Devices, systems, and methods for sending positional information from transmitters/beacons are disclosed. In one implementation a transmitter generates a range block including a ranging signal and a hybrid block including positioning data, and sends the range block and hybrid block in predefined slots in a transmit frame. A receiver in a user device receives signals from a plurality of transmitters and generates position/location information using trilateration and measured altitude information in comparison with transmitter altitude information. | 07-04-2013 |
20130271324 | SYSTEMS AND METHODS CONFIGURED TO ESTIMATE RECEIVER POSITION USING TIMING DATA ASSOCIATED WITH REFERENCE LOCATIONS IN THREE-DIMENSIONAL SPACE - Systems, methods and computer program products for determining a position location estimate for a remote receiver based on one or more time-of-arrival measurements transmitted from one or more transmitters and first timing data associated with the one or more transmitters and further associated with one or more reference locations within a reference area of the remote receiver are described. | 10-17-2013 |
20130324154 | SYSTEMS AND METHODS FOR LOCATION POSITIONING OF USER DEVICE - Devices, systems, and methods for gathering, calculating and sending positioning information at a user device to one or more networks may be disclosed. In a first implementation the user device transforms pseudorange information relating to terrestrial beacons into GNSS pseudorange information. In a second implementation, the user device sends position information using GNSS information elements. In a third implementation, the user device sends position information using non-GNSS information elements. | 12-05-2013 |
20140266904 | METHODS AND APPARATUS FOR IMPROVING TIME OF ARRIVAL DETERMINATION - Devices, systems, and methods for improving performance in positioning systems are disclosed. Signal processing methods to determine a first time of arrival signal, along with associated hardware and software apparatus for implementing such methods are described. | 09-18-2014 |
20140266905 | METHODS AND APPARATUS FOR IMPROVING TIME OF ARRIVAL DETERMINATION - Devices, systems, and methods for improving performance in positioning systems are disclosed. Signal processing methods to determine a first time of arrival signal, along with associated hardware and software apparatus for implementing such methods are described. | 09-18-2014 |
20140266911 | DIRECTIONAL PRUNING OF TRANSMITTERS TO IMPROVE POSITION DETERMINATION - Described are systems and methods for estimating a position of receiver using ranging signals from different regions in a network of transmitters. In some embodiments, each ranging signal that exceeds a quality criterion is assigned to one of several defined regions based on a characteristic of that ranging signal. A maximum number of ranging signals per region may be selected and used during trilateration. | 09-18-2014 |
20140266912 | DIRECTIONAL PRUNING OF TRANSMITTERS TO IMPROVE POSITION DETERMINATION - Described are systems and methods for identifying transmitters that adversely affect a trilateration result. | 09-18-2014 |
20140266913 | PERFORMANCE ENHANCEMENTS FOR LOCAL NETWORK OF BEACONS - Described are systems and methods relating to localized networks of beacons. | 09-18-2014 |
20140274125 | PERFORMANCE ENHANCEMENTS FOR LOCAL NETWORK OF BEACONS - Described are systems and methods for estimating a position of a receiver within a venue using localized networks of beacons. Certain aspects relate to different configurations of the networks. Other aspects relate to estimating the position of the receiver when the receiver approaches an edge of a localized network of beacon. | 09-18-2014 |
20140274126 | SYSTEMS AND METHODS PROVIDING TRANSMIT DIVERSITY TO COMBAT MULTIPATH EFFECTS IN POSITION ESTIMATION - Described are systems and methods for estimating a position of receiver using co-located transmitters. | 09-18-2014 |