Abstract: A wireless communication system includes a first wireless communication node for transmitting a data signal that is sent to a second wireless communication node by skywave propagation over at least two different data transmission paths. The first data transmission path includes at least one reflection point where the data signal is reflected by the atmosphere and the second data transmission path includes more reflection points than the first data transmission path. The data signal that travelled along the first data transmission path is decoded before the data signal that travelled along the second data transmission path.

Abstract: A ranging session between multiple user equipments (UEs) is initiated using an initial message that includes identifiers (IDs) for the initiating UE and each of one or more responder UEs. Each UE in the ranging session independently determines the timing instances of the signaling for each UE in the ranging session based on the UE IDs in the initial message. Signaling information, such as identifiers for the ranging signals, may likewise be independent determined by each UE based on the UE IDs. The order of UE IDs and number of responder UEs provided in the initial message may also be used to determine the timing instances of signaling and signaling information. The UEs, for example, may use a common multivariable deterministic function with the UE IDs as inputs to each separately derive the timing instance for itself and the other UEs in the ranging session.

Abstract: A radio frequency module includes: a first filter circuit disposed on a first path that connects an antenna terminal and a first input/output terminal, and having a passband that is a first frequency band; a second filter circuit disposed on a second path that connects the antenna terminal and a second input/output terminal, and having a passband that is a second frequency band higher than the first frequency band; and a band-elimination filter circuit disposed on the second path and having an attenuation band that is a partial band of a third frequency band that belongs to an unlicensed band ranging from 5 GHz or higher, and is higher than the second frequency band. The second filter circuit is an LC filter circuit that includes an inductor and a capacitor.

Abstract: A system includes a housing operably coupled with a vehicle system, and a vehicle monitoring system disposed within the housing comprising a wireless communication device including an antenna configured to wirelessly communication data signals. One or more ground radials are electrically coupled with the wireless communication device and conduct the data signals from the wireless communication device. The one or more ground radials form a ground plane of the antenna while the vehicle system is moving and the antenna is wirelessly communicating the data signals.

Abstract: A switching circuit comprises a first filter, a second filter and a plurality of switches. The first filter is configured to filter a first frequency band, a second frequency band that is adjacent to the first frequency band and a gap band between the first frequency band and the second frequency band. The second filter is configured to filter the second frequency band. The plurality of switches is configured to route signals from an antenna through one of the first filter and second filter.

Abstract: The present disclosure relates to a maritime communication system based on low earth orbit satellites and an unmanned aerial vehicle. The maritime communication system according to one embodiment may include one or more maritime users, one or more satellites connected to a network operator, and an unmanned aerial vehicle (UAV) for relaying communication between the maritime users and the satellites.

Abstract: Techniques are described for keyless entry to a structure (e.g., hotel room) utilizing a set-back box. Registrants (e.g., hotel guest) may scan a barcode from their mobile device to check-in to the structure. Upon scanning the barcode or by other means, a mobile device identifier (e.g., a Bluetooth low-energy address (BLE)) is registered and associated with the checked-in structure. Receiving the registered mobile device identifier, the backend server pushes such to the set-back box associated with (e.g., resides in) the checked-in structure. The set-back box is enabled (e.g., BLE enabled) to actively scan addresses of nearby mobile devices. When the registered mobile device identifier is detected within a predetermined signal strength range (e.g., by using received signal strength indicator (RSSI) levels), the set-back box transmits a command to a smart lock (e.g., via BLE or Wifi or other radio) or to a lock controlling backend processor, to open the lock.

Abstract: A computational framework for designing a constellation that includes a plurality of cube satellites (CubeSats) includes an orbit propagation module, a coverage estimation module, a connectivity estimation module and an annealing module. The orbit propagation module receives a plurality of static parameters for the constellation and determines a position vector, a ground track and sub-satellite points for each of the plurality of CubeSats. The coverage estimation module receives the plurality of static parameters for the constellation and estimates Earth coverage for the constellation. The connectivity estimation module receives the plurality of static parameters for the constellation and determines active inter-satellite links (ISL) in the constellation. The annealing module receives input from the orbit propagation module, the coverage estimation module and the connectivity module and employs an annealing algorithm that generates a constellation design.

Abstract: A diplexer includes a first filter circuit, and a second filter circuit. The first filter circuit is coupled to a first port for providing a first signal path for a first radio frequency (RF) signal. The second filter circuit is coupled to the first port for providing a second signal path for a second RF signal. The first filter circuit includes a first tunable resonant circuit for tuning a first transmission zero corresponding to a first frequency multiplication of the first RF signal. The second filter circuit includes a second tunable resonant circuit for tuning a first transmission zero corresponding to a first frequency multiplication of the second RF signal. The first frequency multiplication of the first RF signal corresponding to the first filter circuit is a fourth harmonic of the first RF signal.

Abstract: The present disclosure provides techniques for bandwidth constrained communication systems with frequency domain information processing. A bandwidth constrained equalized transport (BCET) communication system can include a transmitter, a communication channel, and a receiver. The transmitter can include a pulse-shaping filter that intentionally introduces memory into a signal in the form of inter-symbol interference, an error control code (ECC) encoder, a multidimensional fast Fourier transform (FFT) processing block that processes the signal in the frequency domain, and a first interleaver. The receiver can include an information-retrieving equalizer, a deinterleaver with an ECC decoder, and a second interleaver joined in an iterative ECC decoding loop. The communication system can be bandwidth constrained, and the signal can comprise an information rate that is higher than that of a communication system without intentional introduction of the memory at the transmitter.

Abstract: Embodiments of the invention include a wakeup receiver (WRX) featuring a charge-domain analog front end (AFE) with parallel radio frequency (RF) rectifier, charge-transfer summation amplifier (CTSA), and successive approximation analog-to-digital converter (SAR ADC) stages. The WRX operates at very low power and exhibits above-average sensitivity, random pulsed interferer rejections, and yield over process.

Abstract: Systems for determining a variability in a state of a medium include one or more transmit elements or antennas and one or more receive elements or antennas which are relatively decoupled from one another. The transmit and receive elements or antennas can be less than 95% coupled to one another. The system also includes a transmit circuit configured to generate a transmit signal to be transmitted, which is in a radio or microwave frequency range of the electromagnetic spectrum. The system also includes a receive circuit configured to receive a response detected by the at least one receive antenna resulting from transmission of the transmit signal into the medium. The system includes a processor configured to determine the variability in the state of the medium based on processing of the response over time. The variability can further be used to direct notifications or automated actions.

Abstract: Various data transmission detection systems are described. A receiver input through which a wireless data transmission signal is received may be present. A plurality of mixers in communication with the receiver input may be present, which may be digitally implemented. A data transmission detector may be present that receives a mixed wireless data transmission signal from each mixer and creates a plurality of scores. A match detection module may be present that receives the scores and identifies a highest score. The signal mapped to the highest score to be selected for further processing.

Abstract: A system and method for transmission of a signal for a powered assistive device has a sensor node with a wireless transmitter adapted for digitally transmitting a transmitted signal, the sensor node adapted for receiving and monitoring a sensor signal from a sensor attached to a user, and a master node with a controller and a wireless receiver for receiving the transmitted signal from the wireless transmitter. The master node processes the transmitted signal and communicates a control signal to the powered assistive device. The wireless transmitter transmits the transmitted signal at a first rate when the wireless transmitter adapted to transmit the transmitted signal at a first rate when the sensor signal is indicative of the rest state and to transmit the transmitted signal at a second rate when the sensor signal is indicative of the active state, the second rate being greater than the first rate.

Abstract: A system for generating a hypoglycemia risk signal associated with exercise-induced Hypoglycemia. The system can include a processor configured to obtain a blood glucose signal (BGstart), a ratio of absolute insulin on board over total daily insulin signal (IOBabs/TDI), and an initial glycemic slope signal (S0); generate a hypoglycemia risk signal based on a hypoglycemia prediction algorithm that determines the probability of a user being hypoglycemic during or after exercise based on the obtained BGstarts, IOBabs/TDI and S0.

Abstract: A monitor includes a casing with a display, a display controller disposed within the casing and that controls the display, a processor disposed within the casing that controls the display and communicates with a fifth generation (5G) network, a 5G antenna that connects the monitor to the 5G network, and a switch that switches the processor between an activated state and a deactivated state. The monitor is a zero-client system when the processor is in the activated state and a plain display when the processor is in the deactivated state.

Abstract: The invention relates to a modular communication device having a master element with a control unit and bidirectional electrical control input-outputs, a series of modular elements having an upstream connection interface with a series of upstream input-output terminals disposed in locations forming a predetermined pattern, a downstream connection interface having a series of downstream input-output terminals disposed in locations forming the same predetermined pattern, a plurality of bidirectional electrical links connecting an upstream input-output terminal to a downstream input-output terminal in such a manner as to form a circular permutation between the ranks of the upstream and downstream input-output terminals electrically connected in pairs, and in which one of the electrical links is a local control link having an electronic communications module, the modular elements being connected to one another.

Abstract: A wireless communication device includes a transmitter that is provided in a rotary part of a rotary device and transmits a wireless signal; a receiver that is provided in a stationary part of the rotary device, receives the wireless signal, and calculates a communication quality level based on the wireless signal; and processing circuitry to determine a communication cycle based on the communication quality level so that the communication cycle synchronizes with a cycle as a multiple of a rotation cycle of the rotary part by an integer greater than or equal to 1, and to make timing of the communication between the transmitter and the receiver follow the rotation cycle by increasing or decreasing the communication cycle so that the communication quality level increases.

Abstract: There is set forth herein, in one embodiment, receiving an aggregate scanning signal stream from a set of scanning antennas configured in a scanning configuration; receiving aggregate communication signal streams from first to Nth sets of communication antennas configured in respective communication configurations; identifying an interfering signal stream within the aggregate scanning signal stream and determining a direction associated to such interfering signal stream, wherein the identifying and determining are performed with use of processing of the aggregate scanning signal streams received from the scanning antennas configured in a scanning configuration; and returning an action decision responsively to the identifying and the determining.

Abstract: Architectures and techniques relate to selectively implementing certain components to suppress emissions. For example, an emissions-suppression circuit can include a notch filter associated with a first frequency range, a switch assembly coupled to the notch filter, and a duplexer coupled to the switch assembly. The switch assembly can be configured to, in a filter state, couple the notch filter to a transmit path and configured to, in a bypass state, decouple the notch filter from the transmit path. The transmit path can be associated with two or more switch connections in the notch-filter state and associated with one switch connection in the bypass state. The duplexer can include a transmit filter that is associated with a second frequency range.