Systems and methods for detecting the presence of a body (typically a human) in a network without fiducial elements while additionally using fiducial elements to assist the system and possibly reduce the computational loading on the system. The fiducial element may be used in many ways including, without limitation, assisting in ignoring some bodies present in the detection area and training the system using additional data.

Computer assistance in interval management may be beneficial in a number of ways. For example, digital communication of interval management instructions or information related to interval management may beneficially be communicated to aircraft with respect to other aircraft. This information may be communicated overlaid on air traffic control (ATC) communications, or otherwise. A method can include, for example, obtaining a spacing goal for an aircraft relative to a target aircraft. The method can also include determining clearance instructions for the aircraft, wherein the speed guidance is based on the spacing goal. The method can further include transmitting the clearance instructions in a computer-readable format to the aircraft. The instructions can be provided by an overlay-modulated signal of a provided modulated ATC signal. The instructions can be configured to enable control of the aircraft to achieve the spacing goal.

A safety sensing system implements a method for a person in an industrial environment comprises providing a personnel locator device (10) for location on a person and a reference system comprising a plurality of nodes (20) located at predetermined locations in the industrial environment (100). Radio ranging signals are transmitted between the nodes (20) and the personnel locator device (10) and measurements of times of flight of the radio ranging signals are derived. The location of the personnel locator device (10) is calculated based on the measurements of the times of flight of the radio ranging signals and reference information representing the predetermined locations of the nodes (10). It is determined if the calculated location of the personnel locator device (10) is within one or more danger zones in the industrial environment (100) and a warning signal is output in response thereto.

An RF PNT system may include LORAN stations. Each LORAN station may include a LORAN antenna, and a LORAN transmitter coupled to the LORAN antenna and configured to transmit a series of LORAN PNT RF pulses having a time spacing between adjacent LORAN PNT RF pulses. One or more of the LORAN stations may include a message embedding generator coupled to the LORAN transmitter and configured to generate message RF bursts based upon an input message, and with each message RF burst being in the time spacing between respective adjacent LORAN PNT RF pulses.

A tag enhances vehicle radar visibility of objects by increasing the effective radar cross-section of the object, allowing detection at longer ranges and providing the vehicle/driver with more time to avoid a collision. The tag may include a receive antenna and a bandpass filter configured to receive a signal from the receive antenna and to allow a portion of the frequency range of the signal from the receive antenna through. The tag may also include an amplifier configured to receive and amplify the signal with the portion of the frequency range from the bandpass filter. The tag may further include a transmit antenna configured to transmit the amplified signal. The receive antenna, the transmit antenna, and the amplifier may be configured such that antenna-to-antenna isolation between the receive antenna and the transmit antenna is greater than a gain of the amplifier.

A digital data rate enhancement filter is described. The digital data rate enhancement filter-includes an enhancement filter input, a first interpolation filter, a second interpolation filter, and a multiplexer circuit. The first interpolation filter is connected to the enhancement filter input downstream of the enhancement filter input. The second interpolation filter is connected to the first interpolation filter downstream of the first interpolation filter. The enhancement filter input is configured to receive a digital input signal set. The first interpolation filter is configured to receive the digital input signal set and to interpolate the digital input signal set, thereby obtaining a first interpolated signal set. The second interpolation filter is configured to receive the first interpolated signal set and to interpolate the first interpolated signal set, thereby obtaining a second interpolated signal set. The multiplexer circuit is configured to selectively receive the first interpolated signal set and/or the second interpolated signal set. The multiplexer circuit further is configured to output the first interpolated signal set and/or the second interpolated signal set received. Further, a digital data rate reduction filter and a digital oscilloscope are described.

A UE transmits, to at least one UE, a PRS request message, the transmitted PRS request message including one or more parameters including at least one of: an SL ranging protocol version, one or more supported PRS channels, a supported per-channel PRS bandwidth, an initiator UE-assigned PRS Tx time, or a post-PRS Tx time. The UE receives, from the at least one UE, a PRS response message based on the transmitted PRS request message. The UE transmits, to the at least one UE, a PRS confirmation message based on the received PRS response message, the transmitted PRS confirmation message including one or more parameters including at least one of: the SL ranging protocol version, the one or more supported PRS channels, the supported per-channel PRS bandwidth, the initiator UE-assigned PRS Tx time, or the post-PRS Tx time.

This disclosure describes systems, methods, and devices related to an invalid location measurement report (LMR) indication. A device may identify a first null data packet (NDP) received from a first station device during, wherein the first NDP is used for channel sounding. The device may perform a time of arrival (ToA) calculation based on the NDP. The device may determine an invalid indication associated with the first NDP based on the ToA calculation. The device may generate an LMR comprising of the invalid measurement indication. The device may cause to send the LMR to the first device.

In some examples, a system includes a transceiver configured to transmit a first surveillance message at a first power level at or below a first maximum power level. The system also includes processing circuitry coupled to the transceiver, the processing circuitry configured to determine that a threshold condition exists. The processing circuitry is also configured to determine a second maximum power level in response to determining that the threshold condition exists, where the second maximum power level is lower than the first maximum power level. The transceiver is configured to transmit, in response to the processing circuitry determining that the threshold condition exists, a second surveillance message at a second power level, wherein the second power level is at or below the second maximum power level.

The present disclosure relates to an electronic device for performing ranging by using an ultra-wideband (UWB) communication method, and an operation method of the electronic device. According to an embodiment, an operation method of a first electronic device may include: transmitting, by the first electronic device, a first ranging control message (RCM) including information for controlling a ranging procedure of a ranging group, the first RCM including time information configured for receiving a ranging request from a device not participating in the ranging group; receiving a ranging request from a second electronic device based on the time information; transmitting a second RCM including information about a slot allocated to the second electronic device; and performing ranging with the second electronic device based on the second RCM.