Systems, methods, apparatuses, and computer readable media are disclosed for improving, in some examples, registration of radio frequency tags with a location system. Example embodiments may include a method for registering a participant with a radio frequency (RF) location tag. The method may include determining tag derived data from the one or more registered RF location tags, identifying at least one unregistered RF location tag, determining an identity of a participant for registration with the unregistered RF location tag based at least in part on the tag derived data from the one or more registered RF location tags, and registering the unregistered RF location tag with the participant.

A modular location tag, method of manufacture, and method of use thereof are provided. The modular location tag including a controller including a microcontroller configured to generate a data packet and a two or more individual transmit modules in data communication with the controller such that each individual transmit module is configured to transmit the data packet, each individual transmit module including an antenna and a pulse generator configured to transmit the data packet on ultra-wideband (UWB) blink data pulses. The controller causes substantially simultaneous transmission of the UWB blink data pulses from the respective transmit modules encourage reliable receipt of the UWB blink data pulses at one or more of a plurality of receivers.

Systems, methods, apparatuses, and computer readable media are disclosed for associating a radio frequency identification tag with a participant. In one embodiment, a method is provided for associating an unassociated RF location tag with a participant. The method may include determining an unassociated RF location tag to be associated with the participant, receiving sensor derived data from one or more sensors, determining an identity of the particular participant using the sensor derived data, and associating the identity of the particular participant with the unassociated RF location tag.

Systems, methods, apparatuses, and computer readable media are disclosed for determining events and outputting events based on real-time data for location and movement of objects and audio data. In one embodiment, a method is provided for a method of determining play events that at least includes receiving audio data, wherein the audio data is received from at least one of a memory or a sensor; determining an event probability based on comparing the audio data to an audio profile; and generating an event based on the event probability satisfying a predetermined threshold.

An integrated ultra wideband transceiver. The transceiver comprises a transmitter, a receiver, and at least one on-chip monopole antenna electrically connected to at least one of the transmitter or receiver for transmitting and/or receiving electrical signals. The transceiver further comprises a clock generator comprising a temperature-compensated relaxation oscillator, a baseband controller electrically connected to, and configured to exert a measure of control over, at least one the transmitter, receiver, or clock generator, and a micro-battery operative to provide operating power to each of the transmitter, receiver, clock generator, and baseband controller.

The present electronic generator of modulated subcarrier pulse signals includes a module (15) for modulating a pulse train, the position and amplitude of which are controllable, forming a switching signal (S.sub.3); a switching module (16), connected to the output of the module (15) for modulating a pulse train, including at least one transistor (22), controlled by said switching signal (S.sub.3), a voltage-controlled frequency-locking oscillator (18) having a frequency-locking band around a free oscillation frequency controlled by a control voltage, connected to the output of the switching module (16), the switching module making possible the injection of a periodic pulse signal (S.sub.4) having a frequency spectrum including at least one frequency line within said frequency locking band. Such arrangement makes it possible to obtain, at the output of the oscillator, frequency-controlled, phase-controlled and amplitude-controlled modulated subcarrier pulsed signals (S.sub.5).

Systems, methods, apparatuses, and computer readable media are disclosed for providing interference rejection in ultra-wideband real time locating systems. In one embodiment, an ultra-wideband (UWB) receiver is configured to: receive an interference signal from a source positioned outside a monitored region; receive a composite signal transmitted from a tagged object moving about a playing field within the monitored region, wherein the composite signal comprises a location signal and a component of the interference signal; detect whether the component of the interference signal exceeds a threshold value; and adjust, via a processor, filtering of the composite signal to attenuate the component of the interference signal based on whether the component of the interference signal exceeds the threshold value. Some embodiments provide for filtering of the composite signal using a combiner while others employ a tunable notch filter. Corresponding systems, methods, and computer-readable storage medium are also provided.

A pulse position modulation scheme impulse radio transmitter includes: a bipolar return-to-zero type short-pulse generator; a bandpass filter that has a predetermined pass frequency band and which allows an output of the bipolar return-to-zero type short-pulse generator to pass; a transmission amplifier that amplifies an output of the bandpass filter; and a transmission antenna, wherein the bipolar return-to-zero type short-pulse generator includes: a trigger flip-flop with a position modulation function that outputs a pulse-width-variable pulse in each period of a clock signal, the pulse-width-variable pulse being inverted in each period of the clock signal and the pulse width of the pulse-width-variable pulse differing in accordance with transmission data; and a pulse generation filter that generates a positive pulse or a negative pulse in accordance with a direction in which a varying edge of the pulse-width-variable pulse changes.

An on-off keying (OOK) transmitter and communication method are provided. The OOK transmitter may include a data encoder configured to encode input data into a transmission sequence, a pulse shaper configured to generate pulses based on the transmission sequence, a bi-phase controller configured to generate a control signal to control a random change in phase, between two phases, of a carrier based on the transmission sequence, a bi-phased switch configured to randomly change a phase of the carrier generated by a voltage-controlled oscillator (VCO), based on the control signal, and a power amplifier (PA) configured to generate a transmission signal based on the generated pulses and the carrier with the randomly changed phase. The PA may be a bi-phasing PA, and the bi-phased switch may be included in the bi-phasing PA.

A digital pre-distortion system can inversely model a power amplifier of a system to linearize the transmitter. A complex baseband model for digital pre-distortion based on a narrowband signal assumption is unworkable for an ultra wide band Cable television application. Predistortion can use a true wide band model including real-valued basis terms, obtained from a real-valued signal. When raised to a power, both even and odd harmonics or both odd or even other non-linear terms are represented and negative frequency fold-over can be accounted for. A Hilbert transform can be applied. Compressed sensing can be used to reduce the number of basis terms in the true real wide band model to generate a sparse model. Sparse equalization can be added to improve the stability of the digital pre-distortion system.