A system to provide circadian-friendly lighting for nighttime hospital care comprising a lighting module and a transmitter tag that interface wirelessly wherein the lighting module comprises red-shifted light spectra, which is proven to be less disruptive to melatonin production than current blue-shifted hospital lighting; wherein the light output of the devices is modulated by the proximity of a tag to the device, with light intensity increasing with closer proximity between these two components and decreasing with increased distance, thereby providing hands-free lighting to caregivers in the specific locations where they need light to perform care tasks.

A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on the environment, the current information stored in the radar system, and/or external information provided to the radar system. The system allows improved resolution of range, Doppler and/or angle depending on the desired objective.

An interference removal filter that includes a combination of a first filter and a second filter, where the first filter passes signals over a frequency range of size B with a variation of less than +/−3 dB, where the peak value of the impulse response of the second filter is displaced in time from the peak value of the impulse response of the first filter by at least 2/B time units, and where the combination of the first filter and the second filter produces a notch in frequency at a frequency location within the frequency range.

A virtual containment zone system is provided. The virtual containment zone system includes a plurality of beacons, a plurality of joining segments, and a tracking device. Each of the plurality of beacons employ ultra-wideband and define a vertex of a virtual containment zone boundary that forms the perimeter of a virtual containment zone. Each of the plurality of joining segments define the virtual containment zone boundary between two of the plurality of beacons. The tracking device comprises a processing device. The processing device is configured to determine the virtual containment zone boundary, enable one or more of the plurality of joining segments to take an action in response to a location of the tracking device, determine the location of the tracking device, determine, based on the location of the tracking device, an action to take, and send, to the tracking device, a signal to perform the action.

In one aspect, a first device may include at least one processor, an ultra-wideband (UWB) transceiver accessible to the at least one processor, and storage accessible to the at least one processor. The storage may include instructions executable by the at least one processor to track a location of a second device different from the first device using one or more UWB signals received from the second device via the UWB transceiver. The instructions may also be executable to unlock a hardware lock controlled by the first device responsive to a determination, based on the tracking of the location of the second device, that the second device is within a predetermined area of the first device.

Provided is a secure ranging method capable of blocking access of a malicious user by preventing an attack by the malicious user when ranging is performed using an ultra-wideband (UWB). Also, provided is a method of increasing accuracy of ranging. A method of operating an electronic device for performing ranging by using a UWB in a wireless communication system includes: transmitting and receiving at least one frame for ranging, to and from at least one other electronic device; obtaining a first ranging value and a second ranging value, based on the at least one frame; and performing integrity checking, based on a result of comparing the first ranging value with the second ranging value.

A pulse generator comprising: a first signal generating arm comprising a first inductor and a plurality of switching elements, each arranged to draw current through the first inductor; and a controller arranged to activate the plurality of switching elements in a predetermined sequence so as to generate a predetermined pulse waveform at a pulse generator output. The switching elements of the signal generating arm and the inductor together form a pulse synthesizer that takes the signal from the controller and uses it to synthesize an output pulse. Compared with conventional transmitter architectures, the functions of the upconversion mixer, the DAC, and the power amplifier are all performed by a single simplified circuit. This is both area efficient and power efficient.

The present invention relates to an ultra-wide band (UWB) ranging device and a UWB ranging method using the same. The UWB ranging device includes a memory in which a program for UWB ranging is stored, and a processor configured to execute the program, wherein the UWB ranging device performs the UWB ranging by transmitting an integrated packet that includes a Scrambled Timestamp Sequence (STS) and a payload.

An unauthorized communication prevention system includes a communication device that is arranged in an operation subject and configured to wirelessly communicate with a terminal. The system further includes a notification unit that transmits unique authentication information of the operation subject when the terminal and the communication device establish communication; a checking unit that checks, with the authentication information, whether the terminal and the operation subject are a proper pair; and an actuation unit that performs a process for determining a positional relationship of the terminal relative to the operation subject in accordance with a check result of the checking unit.

A communication device and method include a reconfigurable receiver that is reconfigurable between communication, ranging and radar modes. The reconfigurable receiver includes a mixer configured to mix digital samples with a carrier phase estimate signal and configured to generate in-phase digital samples based on the carrier phase estimate. The reconfigurable receiver further includes a symbol correlator configured to correlate against the in-phase digital samples and generate correlated data, and a symbol binning unit configured to bin the correlated data and generate a first order channel impulse response estimate. The reconfigurable receiver yet further includes a multiplexer configured to switch the digital samples to the symbol binning unit when the reconfigurable receiver is configured in radar mode and to switch the correlated data to the symbol binning unit when the reconfigurable receiver is configured in a ranging mode.