A GNSS receiver includes an antenna device. Whether an environment around the GNSS receiver is a multipath environment in which an occurrence of multipath is probable. The antenna device is set in a first reception mode with a first directivity in response to not determining that the environment around the GNSS receiver is the multipath environment. In contrast, the antenna device is set in a second reception mode in response to determining that the environment around the GNSS receiver is the multipath environment. The second reception mode is a mode with a second directivity having an elevation angle higher than an elevation angle of the first directivity of the first reception mode.

A method for determining positions of a mobile system is disclosed. The method involves receiving, by a receiver of the mobile system, a first set of correction data which is broadcasted from a first transmitter, wherein the first set of correction data comprises Differential Global Navigation Satellite System (D-GNSS) correction data, estimating, using a real-time kinematics (RTK) method, a first position of the mobile system using at least a portion of the first set of correction data, estimating one or more unknown parameters of a precise point positioning (PPP) estimation method based at least on the estimated first position of the mobile system and the first set of correction data, and estimating a second position of the mobile system using the estimated one or more parameters and the PPP estimation method, wherein the second position of the mobile system is different from the first position of the mobile system.

A device implementing a system for device orientation initialization includes at least one processor configured to determine that the device is within or coupled to a vehicle in motion. The at least one processor is configured to employ, in response to the determining, a first position estimation model to estimate a position of the device, and detect occurrence of a predefined condition with respect to employing the first position estimation model. The at least one processor is further configured to switch, in response to detecting occurrence of the predefined condition, from employing the first position estimation model to employing a second position estimation model to estimate the position of the device. The first and second position estimation model apply different respective error state metrics in estimating the position of the device.

A robot according to an embodiment may include at least one driving motor for providing a driving force for driving of the robot, a position detector including at least one sensor or receiver for detecting a position of the robot, a pressure detector including at least one sensor for detecting whether a user who in on board the robot gets off the robot and a processor for detecting the position of the robot through the position detector, recognizing that the user has arrived at the destination when it is detected that the user gets off the robot and recognize that the user has not arrived at the destination when it is not detected that the user gets off the robot.

Geolocation device target path data is processed by receiving source geolocation path data about a plurality of targets from at least one geolocation device, analyzing the path data to detect when the path data from one of the targets and the path data from another of the targets are likely to represent a same physical target, and generating modified path data to represent only one target using a merger of the path data from one of the targets and the path data from the other of the targets when they are likely to represent the same physical target. Providing merged and/or de-merged target path data improves the ability of a user to monitor geolocation device target path data.

The present invention makes it possible to enhance the accuracy of position and attitude estimation. A position and attitude estimation device (10) is provided with a first detection unit (1) for detecting a plurality of first position and attitude parameters pertaining to the position and attitude of a moving object, a first position and attitude estimation unit (2) for estimating a first position and attitude of the moving object at a first time on the basis of the plurality of detected first position and attitude parameters, a second detection unit (3) for detecting a plurality of second position and attitude parameters pertaining to the position and attitude of the moving object, a second position and attitude estimation unit (4) for estimating a second position and attitude of the moving object at a second time different from the first time on the basis of the plurality of detected second position and attitude parameters, and a position and attitude output unit (5) for outputting a third position and attitude on the basis of the estimated first position and attitude and second position and attitude.

A method for operating a GNSS sensor of a vehicle having control operations influenceable via an electronic control unit includes receiving satellite data, evaluating the satellite data, and deactivating at least one operating mode of the GNSS sensor when at least a portion of the satellite data is unsuitable for determining the position of the vehicle.

An on-board device includes a sensor device that detects at least one sensor detection value. Sensor information includes the at least one sensor detection value and a detection time. A mobile terminal receives the sensor information and positioning information from the on-board device. The mobile terminal includes an information synchronizer that synchronizes positioning information with the sensor information when a time difference between a time at which the positioning information is obtained and the detection time is equal to or less than a predetermined value. The positioning information includes a position obtained by a positioning information obtaining unit and the time at which the position is obtained. A movable-object position estimation unit estimates a position of a movable object based on the positioning information and the sensor information synchronized with each other by the information synchronizer.

First information is obtained from a sensing device at a first time. The first information corresponds to a radio signal received at the device from a candidate location. The device is at a first location at the first time. Second information is obtained from the device at a second time. The second information corresponds to a radio signal received at the device from the candidate location. The device is at a second location at the second time. A system determines that a pattern is in each of the first and second information and determines relationships between the candidate location and the device at each first and second location. The system obtains inverses of the relationships and determines estimates of the received radio signals based on the information and inverses. The system measures or estimates energy emitted from the candidate location based on the estimates.

A Global Navigation Satellite System (GNSS) receiver includes a wideband signal correlator and a multipath mitigator. The wideband signal correlator generates wideband correlation signals of at least one of a plurality of GNSS signals with respect to corresponding locally generated code replica signals in which a bandwidth of the wideband signal correlation module is at least about 20 MHz. The multipath mitigator determines a Line of Sight (LOS) signal from the wideband correlation signals. The GNNS receiver may include a narrowband signal correlator to generate narrowband correlation signals of the at least one GNSS signal with respect to corresponding locally generated code replica signals in which a bandwidth of the narrowband signal correlation module is less than about 6 MHz. The multipath mitigator further corrects a range and range-rate measurement generated from the narrowband correlation signals based on a code phase and a carrier estimated based on the LOS signal.