Abstract: A detection device with a calibration function is configured to detect an object. The detection device includes an antenna element, a transmission line, a detection circuit, and a processor. The transmission line is coupled to the antenna element. The detection circuit is coupled to the transmission line. The detection circuit performs a detection process, so as to obtain an estimated distance between the antenna element and the object. The processor is coupled to the detection circuit. The processor calculates the calibrated distance by subtracting the error distance from the estimated distance.

Abstract: The embodiments relate to a radar signal processing device, method and system. Specifically, a radar signal processing device according to the embodiments may include a receiver for receiving first sensing data from a first radar, and a controller configured to decode the first sensing data using an auto-encoder method, classify objects around a vehicle based on the decoded first sensing data, and track the object.

Abstract: Method and system of calibrating and cohering at least one radar antenna in receive (RX) mode and transmit (TX) mode, comprising performing RX mode calibration on at least one radar antenna using radio frequency (RF) far field calibration source, determining RF phase ØRXn using RF far field calibration source for each at least one radar antenna, operating at least one radar antenna in RX mode with at least one near field antenna to determine plurality of RX mode phases in at least one radar antenna and at least one near field antenna, operating at least one radar antenna in TX mode with at least one near field antenna to determine plurality of TX mode phases in at least one radar antenna and at least one near field antenna, and deriving TX mode calibration phases as function of determined RX mode phases and determined TX mode calibration phases.

Abstract: For example, a radar apparatus may include a mismatch calibrator configured to determine antenna mismatch calibration information to calibrate an antenna mismatch of a radar antenna array comprising a plurality of receive (Rx) antennas; and a processor to process radar Rx data, and to generate radar information based on the radar Rx data and the antenna mismatch calibration information, the radar Rx data is based on Rx radar signals received at the plurality of Rx antennas.

Abstract: The present disclosure generally pertains to systems and methods for autonomously detecting and correcting anomalies in position information provided to aircraft using radio-frequency signals. By enabling autonomously detecting and correcting for anomalies in the operation of a ground-based solution entirely independent of GPS, systems of the present disclosure can make the provided position information more accurate and robust, thereby enhancing the effectiveness and safety of navigation systems using the provided position information. More precisely, systems of the present disclosure may employ a series of ground-based beacon transmitters to provide radio-frequency (RF) signal pulse with a highly regular frequency. A locating receiver can detect the arrival times of these pulses and use this information to detect and report certain anomalies. These reports may then be used to autonomously correct the detected anomalies.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a first sensing signal transmitted by a base station. The UE may determine a preferred sensing direction for a second sensing signal based at least in part on the first sensing signal. The UE may transmit a directional sensing signal request to the base station. The directional sensing signal request may include information indicating the preferred sensing direction for the second sensing signal. Numerous other aspects are provided.

Abstract: A method for recognizing a low-probability-of-interception (LPI) radar signal waveform includes: obtaining, by a radar signal receiver, an LPI radar signal s(t), s(t) varying with time t; extracting, by a radar signal processor, an adaptive feature and a pre-defined analytical feature from the LPI radar signal s(t); combining, by the radar signal processor, the adaptive feature with the pre-defined analytical feature to generate a constructed adaptive feature; and applying, by the radar signal processor, a convolutional neural network (CNN) model to classify the constructed adaptive feature to recognize the LPI radar signal waveform.

Abstract: A method and system for wirelessly tracking power tools and related devices to aid with inventory management and to help minimize, prevent, and recover misplaced or stolen tools throughout the job site. The tools and/or batteries include wireless transmitting capabilities (e.g., an ISM unit) to transmit data to a fob, puck repeater, and/or gateway over an ISM network. The gateway is operable to translate and output the ISM communications over a cellular network to a remote monitoring unit, such as a personal computer or smart phone. Additionally, the gateway is further operable to translate and output cellular communications from the remote monitoring unit to ISM communications over the ISM network. A wireless tethering system and method is also disclosed whereby an ISM battery places a power tool in a lock-out or limp mode after the ISM battery remains outside of ISM communications for a prolonged period of time.

Abstract: A system for emulating radio frequency channels is provided. Said system comprises an input device for inputting a channel scenario, a channel coordinator device being in connection with the input device, and at least two channel emulator devices each being in connection with the channel coordinator device and for outputting a corresponding radio frequency signal to emulate the channel scenario. In this context, the channel coordinator device is configured to control each of the at least two channel emulator devices on the basis of the channel scenario and/or geometrical information with respect to the at least two channel emulator devices.

Abstract: A communication method and a communication apparatus are provided to send, to a terminal device by using an RRC message, information about at least one first network slice corresponding to a first identifier. The method includes: a first access network device broadcasts a first identifier, where the first identifier identifies information about a first access network slice; and the first access network device sends a radio resource control RRC message to a terminal device, where the RRC message includes information about at least one first network slice corresponding to the first identifier.

Abstract: Systems and methods are provided for controlling electric and electronic devices. The devices may communicate with each other in a many-to-many, peer-to-peer network to provide control functionality without the need for a central controller. Device-to-device control messages may be implemented over short range, wireless broadcast messages.

Abstract: A method and a device for constructing a redundancy-removed coprime radar array based on one-bit quantization. The method includes obtaining a first sub-array element and a second sub-array element both used for constructing a redundancy-removed coprime radar array, and determining a redundancy-removed coprime array respectively corresponding to the first sub-array element and the second sub-array element by a graph theory method; obtaining target echo data of the redundancy-removed coprime array, and obtaining a target radar array by performing one-bit quantization on the target echo data for completing array cavities of the redundancy-removed coprime array; moreover, before the completing, positions of all non-empty array elements in a redundancy coprime array are used to place radars, and before the completing, the radars are not arranged in positions of empty array elements.

Abstract: A given wireless communication node of a wireless mesh network may include at least one processing unit and a plurality of radio modules, where at least one given radio module of the plurality of radio modules is capable of operating in a temporary network-sensing mode in which the given radio module gathers information about any other wireless communication node of the wireless mesh network that is sensed within the given wireless communication node's surrounding area by scanning for radio-frequency signals being emitted by any other radio module within at least a portion of the given wireless communication node's surrounding area while an antenna azimuth of the given radio module is being rotated.

Abstract: Provided are a phase-shifting unit, an antenna unit, a phased array unit, and a phased array. The phase-shifting unit includes a common port, a switch, and two connection ports. A transmission line between the two connection ports is provided with at least two branch ports. Positions of the at least two branch ports on the transmission line are different. The transmission line between every two adjacent branch ports includes a delay line. The switch is configured to switch to a target branch port and establish the connection between the target branch port and the common port so that the common port is connected to the two connection ports to form two paths. Each path is configured to establish the communication connection between the connection port corresponding to each path and the common port to transmit a signal.

Abstract: An accessory for a portable electronic device having opposed front and rear device faces is disclosed. The accessory includes an attachment mechanism and a privacy shield pivotably connected to the attachment mechanism. The attachment mechanism is magnetically attachable to the rear device face. The front device face includes a device screen. The privacy shield is pivotable relative to the attachment mechanism between a mouth concealing position, and a storage position, in which the privacy shield is positioned against the attachment mechanism and overlies the rear device face.

Abstract: There is provided a feeding network device for improved direction estimation. The feeding network device according to an embodiment of the disclosure includes a first coupler, a second coupler, a first delay, a second delay, a crossover, a third coupler, a fourth coupler, a third delay, and a fourth delay. Accordingly, one sum beam and a plurality of difference beams are emitted through the feeding network device of the array antenna, and improved direction estimation is possible through a plurality of monopulse ratios, and accordingly, improvement of direction estimation in a monopulse radar device is expected.

Abstract: A method and system for wirelessly tracking power tools and related devices to aid with inventory management and to help minimize, prevent, and recover misplaced or stolen tools throughout the job site. The tools and/or batteries include wireless transmitting capabilities (e.g., an ISM unit) to transmit data to a fob, puck repeater, and/or gateway over an ISM network. The gateway is operable to translate and output the ISM communications over a cellular network to a remote monitoring unit, such as a personal computer or smart phone. Additionally, the gateway is further operable to translate and output cellular communications from the remote monitoring unit to ISM communications over the ISM network. A wireless tethering system and method is also disclosed whereby an ISM battery places a power tool in a lock-out or limp mode after the ISM battery remains outside of ISM communications for a prolonged period of time.

Abstract: Embodiments of this application provide a Bluetooth connection method, a system, and an electronic device. In the method, when a communication connection between an electronic device and a vehicle head unit is disconnected, the electronic device starts to scan a Bluetooth advertising signal. When a user carrying the electronic device is close to the vehicle head unit, the electronic device may obtain, through scanning, a Bluetooth advertising signal sent by the vehicle head unit. When obtaining, through scanning, the Bluetooth advertising signal sent by the vehicle head unit, the electronic device may start a vehicle manufacturer application when the vehicle manufacturer application is cleared by a system. The electronic device may reconnect to the vehicle head unit through Bluetooth by using the vehicle manufacturer application and a Bluetooth chip. Embodiments of this application can improve convenience of unlocking in a scenario in which a vehicle is insensibly unlocked.

Abstract: An accessory for a portable electronic device comprises an attachment mechanism including a protective casing that is releasably attachable to the electronic device. The casing has a rear panel and a peripheral lip extending about and upward from a perimeter of the rear panel for wrapping around the edges of the electronic device. When the accessory is attached to the electronic device, the rear panel has a panel inner surface directed toward a rear face of the electronic device and a panel outer surface opposite the panel inner surface. The rear panel includes an opening aligned with a camera located on the rear face of the electronic device when the accessory is attached to the electronic device. The accessory further comprises an item holder disposed on the panel outer surface. The item holder includes opposed first and second retaining lips which define a channel therebetween for receiving a user item.

Abstract: A radar time synchronization system according to an example embodiment of the present disclosure include a transmitter radar, a receiver radar, and a quantum interferometer device communicatively coupled to the transmitter radar and the receiver radar. The quantum interferometer device includes a quantum entanglement source operable to transmit a first entangled photon to the transmitter radar and a second entangled photon to the receiver radar. The quantum interferometer device further includes a quantum entanglement detector operable to receive the first entangled photon from the transmitter radar and the second entangled photon from the receiver radar. The quantum entanglement detector further operable to detect a quantum interference effect associated with the first entangled photon and the second entangled photon.