Abstract: A processing pipeline employs one or more bypass caches to allow a transaction that is dependent on the results of a prior transaction to be processed before the prior transaction has completed processing. Each bypass cache is coupled to the input and the output of one of the sections of the processing pipeline so that results of a transaction from that section can be written into or read from the bypass cache as soon as that transaction has been completely processed through that section. With such a configuration, more transactions can be processed by the processing pipeline in a shorter amount of time. This is especially true for very deep pipelines.

Abstract: A volumetric ultrasound system is used to determine the velocity of tissue using 3D echo data. In particular, the velocity of tissue in a 3D volume is determined by steering ultrasound beams to the tissue in the 3D volume and forming 3D echo data from receive ultrasound beams formed from reflections of the steered ultrasound beams from the tissue in the 3D volume. The velocity of the tissue associated with the 3D echo data can be determined using velocity determination techniques. The velocity of the tissue can be displayed in real-time. For example, in one embodiment, a sub-volume of the 3D volume can be scanned and the determined velocity of the tissue displayed in about 50 milliseconds (ms).

Abstract: A satellite communications system for dispersing energy over a wide bandwidth includes a transmitter, a communication link, and a receiver. The transmitter takes a digital data signal and modulates that signal at a prescribed carrier frequency. The modulated digital data signal is then spread over M adjacent digital channels (M.gtoreq.2 and being an integer multiple of 2), each channel containing the same information, to disperse the energy over a wide frequency range. The spectral bandwidth of the adjacent digital channels is chosen with compressed spacing to conserve bandwidth. Next, the spread modulated data signal is transmitted via the communication link to the receiver. In particular, a waveform generator at the transmitter generates a phase-aligned multichannel frequency diversity waveform according to a data clock at a predetermined phase relationship to the digital data.

Abstract: A low probability of intercept communication system (CCSK)--modulates information signals onto an inverse fast Fourier transformation of a large number of simultaneous frequencies that have been determined to be reasonably `quiet` within a given system bandwidth, so as to produce a time domain pulse waveform. The amplitude of each transmitted frequency is weighted. Within the receiver equipment of each participant in the system, the incoming pulse waveform produced by the inverse fast Fourier transformation mechanism at the source is coupled to a fast Fourier transform operator, so as to separate the time domain signal into a plurality of frequency components that contain the modulated data. These components are then convolved with a replica of the plurality of quiet channels to derive a time domain output waveform from which the data modulation can be identified and recovered.