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.

An example disclosed method for determining player performance information associated with a player carrying a first tag moving about a monitored area includes receiving first blink data from a plurality of receivers disposed about the monitored area, wherein the first blink data is generated by the first tag carried by the player moving about the monitored area; weighting the first blink data by: when the player is in a pre-play formation, assigning a first weight to the first blink data; and in response to receiving the play-start indication, assigning a second weight to the first blink data, the second weight being greater than the first weight; determining tag location data based on the weighted first blink data; and determining player performance information based on the tag location data.

An example disclosed method for registering an unregistered radio frequency (RF) location tag carried by a participant includes receiving blink data from an unregistered RF location tag; determining a tag location based on the blink data received from the unregistered RF location tag; directing a camera to view the tag location determined based on the blink data received from the unregistered RF location tag; identifying a participant at the tag location using image data obtained by the camera; and registering the unregistered RF location tag with the identified participant.

This invention relates to ultra wideband wireless communications and more particularly communications systems exploiting mixerless transmitters and energy based receivers. The transmitter as an impulse radio with dynamic frequency and bandwidth hopping for dynamic setting of emitted power spectrum density. The receiver performs dynamic configuration by performing receipt of a wireless training pulse sequence.

Systems, methods, apparatuses, and computer readable media are disclosed for providing analytics for evaluating performance using real time data on movement and proximity of tagged objects. In one embodiment, a method is provided for evaluating a player that includes correlating at least one tag to the player; receiving blink data transmitted by the at least one tag; and determining tag location data based on the blink data. The method further includes receiving player role data; comparing the tag location data to player dynamics/kinetics models based at least in part on the player role data; determining player location data based on the comparing the tag location data to the player dynamics/kinetics models; and determining player performance information based on comparing the player location data to stored player location data.

Within many applications impulse radio based ultra-wideband (IR-UWB) transmission offers significant benefits for very short range high data rate communications when compared with existing standards and protocols. In many of these applications the main design goals are very low power consumption and very low complexity design for easy integration and cost reduction. Digitally programmable IR-UWB transmitters using an on-off keying modulation scheme on a 0.13 microns CMOS process operating on 1.2 V supply and yielding power consumption as low as 0.9 mW at a 10 Mbps data rate with dynamic power control are enabled. The IR-UWB transmitters support new frequency hopping techniques providing more efficient spectrum usage and dynamic allocation of the spectrum when transmitting in highly congested frequency bands. Biphasic scrambling is also introduced for spectral line reduction. Additionally, an energy detection receiver for IR-UWB is presented to similarly meet these design goals whilst being adaptable to address IR-UWB transmitter specificity.

A method for communication includes transmitting a first uplink message from a first remote node (200, 300, 400) to a central node (100) in a wireless communication system according to a first frequency hopping scheme, and transmitting a second uplink message from a second remote node to the central node in the wireless communication system according to a second frequency hopping scheme, different from the first scheme. Both the first and the second uplink messages are received and processed at the central node.

Wirelessly powered receiver system and sensors are described. In an embodiment, the power receiver system, includes an inductive coil that receives wireless power from an external transmitter, a capacitor bank that optimizes power transfer to an energy harvesting device, and a power-receiving frontend RF-DC rectifier with a periodically enabled closed feedback loop that adapts settings of the capacitor bank in real-time to adapt to changes on the inductive coil to maximize power transfer efficiency.

Systems, devices and methods are disclosed for an ultra-wide-band (UWB) transmitter tag capable of operating in different power mode depending on voltage level and/or host interruption signal. The transmitter tag comprises a power management circuit, a one-time-programmable memory (OTP), a read/write memory, a state machine for controlling/monitoring the operation of the tag. The tag goes into the high power mode when the power supply ramps up to a preset voltage level. During the high power mode, the tag consumes the higher level of electrical current as indicated by the battery current signal. Upon completion of high power consumption activity, such as OTP memory download, the tag exits the high power mode and enters the low power mode. The power supply current goes to the low level to minimize the power consumption by the tag.

Ultra-Wideband (UWB) technology is a wireless technology for the transmission of large amounts of digital data as modulated coded impulses over a very wide frequency spectrum with very low power over a short distance. However, to support their deployment in a wide range of applications it would be beneficial to provide solutions which: exploit multiple directive antennas oriented in different directions to ensure spatial filtering of undesired signals and increase signal strength; exploit dynamic configuration of the multi-pulse bundles employed to transmit the bits/symbols within the packets to enhance link quality of service; exploit dynamic configuration of the band or bands which the transmitter operates upon; and exploit antenna sub-systems providing omnidirectional radiation patterns with implementations offering filtering and balun functions with small footprint and low cost.