Abstract:
In a wireless 802.15.4 communication system (300), a high-speed data frame structure (340) is provided which uses the 802.15.4 SHR structure that is spread modulated to obtain the synchronization benefits of the 802.15.4 protocol, but which uses a modified data frame structure for the payload portion without using spreading to thereby improve its transmission efficiency. The transmission efficiency can be further increased by increasing the size of the data payload (and correspondingly, the frame length size).
Abstract:
Embodiments of wireless devices and transmitters are provided, which perform embodiments of automatic gain control methods. The embodiments of wireless devices and transmitters include a ramp generator, a digital gain signal generator, a combiner, and a variable gain amplifier. The ramp generator is adapted to receive a gain control input signal and to generate a gain ramp signal based on the gain control input signal. The digital gain signal generator is adapted to generate and incorporate a gain arc into a digital gain signal. A combiner is adapted to receive and combine a digital input signal with the digital gain signal, to generate a pre-compensated digital signal. The variable gain amplifier is adapted to apply gains indicated in the gain ramp signal to a pre-adjusted analog signal, which is generated based on the pre-compensated digital signal, in order to generate a gain-adjusted analog signal.
Abstract:
The present invention discloses a single unified decoder for performing both convolutional decoding and turbo decoding in the one architecture. The unified decoder can be partitioned dynamically to perform required decoding operations on varying numbers of data streams at different throughput rates. It also supports simultaneous decoding of voice (convolutional decoding) and data (turbo decoding) streams. This invention forms the basis of a decoder that can decode all of the standards for TDMA, IS-95, GSM, GPRS, EDGE, UMTS, and CDMA2000. Processors are stacked together and interconnected so that they can perform separately as separate decoders or in harmony as a single high speed decoder. The unified decoder architecture can support multiple data streams and multiple voice streams simultaneously. Furthermore, the decoder can be dynamically partitioned as required to decode voice streams for different standards.
Abstract:
A novel concept of ergodynamic desktops with slowly varying configurations for ergonomic purposes is provided. Very slow motions are incorporated into the design of desktops, usually used by computer users. The introduced motion is at such a slow pace that it is hardly noticeable, similar to the adiabatic motions of hour or minute hands on a clock. Users of the desktops are therefore induced to adjust their body posture accordingly in a gradual and healthy manner, while still continuing to perform their normal activities without interruption. These desktop designs allow a natural and effortless combination of normal life and exercise. When used in a working environment, they will be useful to improve the health and to enhance the efficiency of workers.
Abstract:
Disclosed is a general methodology to create nanofibers of therapeutic molecules that have a dual role, as both the delivery vehicle and the drug itself. It is shown that with proper molecular design, the integration of enzymatic reaction and self-assembly provides a powerful method to create molecular hydrogels of clinically-used therapeutics without compromising their bioactivities. In addition, the results disclosed herein demonstrate enzyme-instructed self-assembly as a facile strategy for generating the supramolecular hydrogels of molecules that inherently have poor solubility in water. For example, by covalently connecting paclitaxel with a motif that is prone to self-assemble, a hydrogel of paclitaxel can be formed without compromising the activity of the paclitaxel.
Abstract:
Disclosed is a general methodology to create nano fibers of therapeutic molecules that have a dual role, as both the delivery vehicle and the drug itself. It is shown that with proper molecular design, the integration of enzymatic reaction and self-assembly provides a powerful method to create molecular hydrogels of clinically-used therapeutics without compromising their bioactivities. In addition, the results disclosed herein demonstrate enzyme-instructed self-assembly as a facile strategy for generating the supramolecular hydrogels of molecules that inherently have poor solubility in water. For example, by covalently connecting paclitaxel with a motif that is prone to self-assemble, a hydrogel of paclitaxel can be formed without compromising the activity of the paclitaxel.
Abstract:
A wireless communication unit comprises a transmitter having a forward path comprising a power amplifier, PA, and a feedback path operably coupled to the power amplifier, wherein the feedback path comprises a coupler arranged to feed back a portion of a signal to be transmitted and a controller logic module arranged to control a power control value of the power amplifier, such that the forward path and feedback path form a closed loop power control. The controller logic module is arranged to determine a gain variation in the transmitter and provide attenuation to a transmit signal passing therethrough on a transmit slot by transmit slot basis and instruct a power backoff where necessary.
Abstract:
A backside alignment apparatus and method for determining a position relationship between a substrate (6) and a workpiece stage (24). The backside alignment apparatus includes: an illumination apparatus (1) for emanating infrared light; a workpiece stage assembly (2) for supporting and moving the substrate (6); an imaging apparatus (3) for detecting alignment marks and calculating positions of the alignment marks, the alignment marks including a reference plate alignment mark (41) and a backside alignment mark (20); and a reference plate assembly (4) for setting up a relationship between position coordinates of the imaging apparatus (3) and the workpiece stage assembly (2). The illumination apparatus (1) and the imaging apparatus (3) are able to illuminate and align different alignment marks using only one set of illumination apparatus.
Abstract:
In accordance with the present disclosure, disadvantages and problems associated with controlling signal transmission of a wireless communication device may be reduced. In accordance with an example embodiment of the present disclosure a method for controlling transmission of a wireless communication signal comprises sensing one or more signals indicative of a power level of a wireless communication signal. The power level of the wireless communication signal is amplified by a power amplifier according to an amplifier control signal. The method further comprises determining a change in the power level based on the one or more signals indicative of the power level. The change is associated with one or more perturbations of the amplifier control signal. The method also comprises adjusting transmission of the wireless communication signal according to the change in the power level.
Abstract:
In accordance with some embodiments of the present disclosure, a method may include determining a range of frequencies allocated to resource blocks to be transmitted during a subsequent sub-frame slot or sounding reference symbol sub-slot. The method may also include determining an approximate center frequency of the range of frequencies. The method may additionally include modulating resource blocks of the sub-frame or sounding reference symbol sub-slot at the approximate center frequency. The method may further include transmitting the modulated resource blocks at the approximate center frequency.