A system for accurate geospatial location and time transfer using radio transmissions without satellite signals. A position and timing measurement system uses standard uncorrelated radio broadcast signals, each of which transmits on an assigned frequency from a known position defined in latitude and longitude, and each of which transmits a modulated or unmodulated carrier signal. A reference unit at known fixed position receives the said standard broadcast signals in the vicinity, samples the frequencies and content values of their signals and broadcasts the said measured frequency and content data nearly simultaneously with a time mark representing the time of said measurement and further broadcasts its position in latitude and longitude. A mobile unit at an unknown position to be determined receives the said standard broadcast signals in the vicinity and measures the time of arrival of their broadcast, recording the time of said measurement.

A device comprising circuitry configured to: obtain radar signal measurements simultaneously acquired by two or more radar sensors having overlapping fields of view, derive range information of one or more potential targets from samples of radar signal measurements of said two or more radar sensors acquired at the same time or during the same time interval, the range information of a single sample representing a ring segment of potential positions of a potential target at a particular range from the respective radar sensor in its field of view, determine intersection points of ring segments of the derived range information, determine a region of the scene having one of the highest densities of intersection points, select a ring segment per sensor that goes through the selected region, and determine the most likely target position of the potential target from the derived range information of the selected ring segments.

In an embodiment, a method for air-writing character recognition includes: determining a position of an object in a monitoring space using a plurality of millimeter-wave radars, where each millimeter-wave radar of the plurality of millimeter-wave radars has a field of view, and where an intersection of the fields of view of the plurality of millimeter-wave radars forms the monitoring space; tracking the position of the object in the monitoring space over time using the plurality of millimeter-wave radars; determining a character symbol depicted by the tracked position of the object over time using a neural network (NN); and providing a signal based on the determined character symbol.

A hygiene monitoring and management system including a monitoring module and a display. The management module with an input and that receives data via the input. The received data includes one or more locations of a device in a facility, and the management module further includes one or both of software and hardware configured to generate data representative of cleaning behavior associated with the device based on the received data. The cleaning behavior includes timing and movement of the device in the facility, and a cleanliness level of at least one area in the facility.

The present invention discloses a method and a system for navigating an Autonomous Ground Vehicle (AGV) using a radio signal and a vision sensor. The method comprising generating a trajectory plan for a short distance from a path plan, wherein the path plan is determined using destination location and AVG location, identifying an approximate AGV location using a radio signal-based trilateration mechanism, estimating AGV location error with respect to a road lane center by determining distance from the approximate AGV location to road boundary and road lane marking line and orientation difference between AGV orientation and road orientation, and correcting the trajectory plan by using the estimated AGV location error for navigating an AGV.

The present invention regards performing RF-based sensing in RF system (100) comprising multiple nodes (10, 27, 28, 29, 30) of which at least two nodes (10) are included a dense node arrangement (26). A first group of nodes including at least one node (10) of the dense node arrangement (26) and a second group including the at least one node of the first group and at least one additional node of the dense node arrangement are formed. RF-based sensing is performed by the first group in a first sensing area for detecting a first sensing event indicating a presence of an object (32) in the first sensing area. If the first sensing event is detected, RF-based sensing is performed by the second group in a second sensing area (60) at least partially overlapping with the first sensing area for recognizing a second sensing event indicating an activity of the object.

A transportation vehicle having an actuator for automatically adjusting a windowpane and/or a sliding roof of the transportation vehicle; a UWB system having a UWB transceiver and a first and a second antenna, each of which sends and receives UWB pulses; and a control device connected to the UWB system and the actuator to carry out a method based on channel impulse response measurements for detecting objects in a collision region by using the first antenna and the second antenna, and to send a signal that is based on a result of the detection method to interrupt an automatic adjustment of a windowpane and/or a sliding roof of the transportation vehicle to the actuator. Also disclosed is a method and communication system for a transportation vehicle.

Disclosed is a moving object detection system and method. The moving object detection system includes an input unit receiving the sensed signals from two or more radar devices, a distance information computation unit computing distance information of the objects from the received signals, a grouping unit randomly selecting one signal to generate multiple signal groups, and generating the signal groups selected among the generated multiple signal groups as one signal group combination, a calculation unit calculating cross-correlation values for all the signal groups in the same signal group combination and adding up the calculated cross-correlation values, a combination selection unit selecting the signal group combination in which a sum of the cross-correlation values is a maximum, and a position computation unit computing a position of each object by matching the signal groups in the selected signal group combination to the objects.

A radar device includes: a first antenna array including a plurality of antennas arranged on a first straight line; a second antenna array including a plurality of antennas arranged on a second straight line orthogonal to the first straight line; and a calculation unit that calculates a two-dimensional incoming orientation of one or a plurality of incoming waves based on received values of signals received by the plurality of antennas included in the first antenna array and received values of signals received by the plurality of antennas included in the second antenna array. A closest distance among distances between the plurality of antennas included in the first antenna array and the plurality of antennas included in the second antenna array is larger than an antenna interval of the first antenna array or the second antenna array.

A method for locating an object in a facility includes determining position with respect to time of a material handling device associated with a movable vehicle within the facility Signal strength of a signal emitted by at least one identification tag affixed to the object is measured with respect to time. A time that the object is deposited at a fixed position by the material handling device is determined from the measured signal strength. The location in the facility of the fixed position is established using the determined time and the determined position with respect to time.