A signal sending method and a detection apparatus are provided. One method includes: sending, by a detection apparatus, a first signal for target detection, and sending, by the detection apparatus, a second signal indicating information about a resource occupied by the first signal.

A modular radar system comprises an antenna assembly, a support structure to which the antenna assembly is mounted, and a set of modular radar subsystems. The antenna assembly comprises an antenna array, an antenna enclosure to which the antenna array is attached and which is configured to house the antenna array and to distribute communications signals and power signals to the antenna array, and an antenna enclosure interface configured to receive inputs to and provide outputs from, the antenna array. The support structure positions the antenna array at an orientation and elevation for antenna operation. The set of modular radar subsystems is separate from the support structure and in operable communication with the antenna enclosure interface and comprises a data processing subsystem, a cooling subsystem, and an AC power subsystem supplying power to the antenna enclosure, the data processing subsystem, the cooling subsystem and to a DC power conversion subsystem.

A system and a method are provided for achieving long range, over the horizon (OTH), persistent surveillance, alerting, tracking and situational awareness against small, low radar cross section moving targets. The system and method use one or more tethered unmanned arial systems, or unmanned arial vehicles, to lift components including a radar antenna to a height above nearby obstacles or much higher. The system and method can also be used for subsurface radar detection and tracking applications, as well as communications with submarines.

An approach is provided for biasing machine learning models towards potential risks for controlling vehicles/robots. The approach involves, for example, determining an occluded space that is occluded in sensor data collected from one or more sensors of a vehicle or a robot. The approach also involves generating a sensor space completion that represents the occluded space based on biasing a generation of one or more potential risks to the vehicle or the robot originating from the occluded space. The approach further involves providing the sensor space completion to a system of the vehicle or the robot for generating a control decision, a warning, or a combination thereof.

Various arrangements for sonar-based vital sign monitoring are presented herein. A mobile device may be determined to be stationary. In response, sonar-based movement sensing can be activated. Sonar data can then be captured in response to activating the sonar-based movement sensing. A breathing pattern can be detected in the sonar data and used to collect respiration data about a user.

Example embodiments relate to techniques that involve detecting and mitigating automotive interference. Electromagnetic signals propagating in the environment can be received by a radar unit that limits the signals received to a particular angle of arrival with reception antennas that limit the signals received to a particular polarization. Filters can be applied to the signals to remove portions that are outside an expected time range and an expected frequency range that depend on radar signal transmission parameters used by the radar unit. In addition, a model representing an expected electromagnetic signal digital representation can be used to remove portions of the signals that are indicative of spikes and plateaus associated with signal interference. A computing device can then generate an environment representation that indicates positions of surfaces relative to the vehicle using the remaining portions of the signals.

A radar sensor head for a radar system. The radar sensor head includes at least one transmitting antenna for generating and at least one receiving antenna for receiving radar waves; a preprocessing unit for defined preprocessing of received data; an interface for connecting the radar sensor head to a data line; and a calibration data unit for at least partially calibrating the transmitting antenna and/or the receiving antenna, calibration data for the transmitting antenna and the receiving antenna being stored using the calibration data unit.

The present disclosure discloses a system for echo intensity calibration based on continuous wave weather radar data. The system includes a communication module used for establishing a network protocol or local protocol-based communication link between a radar receiver and a radar terminal computer; a main control module which is in communication connection with the communication module to receive radar data of the radar receiver or a control signal of the radar terminal computer and execute an echo intensity calibration strategy; and a storage module which temporarily stores continuous wave weather radar data, and aircraft echo power values that are identified by the main control module within a period of time.

A method includes obtaining configuration information for a radio interface between an electronic device and a base station. The method includes determining uplink transmission information based on the obtained configuration information. The uplink transmission information includes: an indication of one or more types of uplink channels in a plurality of communication time slots (CTSs) of the radio interface; a transmission start time for each of the one or more types of uplink channels; and a transmission duration for each of the one or more types of uplink channels. The method includes, for one or more of the plurality of CTSs: determining, based on the transmission start time, whether the one or more CTSs on the radio interface is occupied; and in response to a determination that the one or more CTSs on the radio interface is not occupied, performing radar operations during a remainder of the transmission duration.

The invention relates to a filling level measuring device for measuring the filling level in a container through the wall thereof by means of ultrasound, having an ultrasonic measuring head, a controller, and a fastening device by means of which the filling level measuring device can be fastened to the container such that the ultrasonic measuring head is pressed against the wall of the container. The invention further relates to a method of operating such a filling level measuring device, wherein a sampling rate is used which is situation-dependent. The invention finally relates to an assembly made up of such a filling level measuring device and at least one spacer which can be attached to the lower edge of a container to be provided with the filling level measuring device.