Abstract: An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.

Abstract: A retro-directive antenna for communicating with a geostationary satellite autonomously detects the direction from which a signal is received, and transmits a beam that points back along the same direction. An array feed is used to illuminate a parabolic reflector. Each feed element of the retro-directive antenna is associated with a unique pointing direction of the beam in the far field. As the transmit energy is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The use of a toroidal reflector with multiple linear array feeds spaced in the azimuth direction enables multi-beam operation, allowing multiple geostationary satellites, spaced by up to fifteen beam widths in azimuth, to be tracked simultaneously and independently.

Abstract: An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.

Abstract: A system is provided that includes a pen-enabled computing arrangement having a capture interface and at least one processing element. The capture interface can capture an electronic input defining a stroke through a plurality of concatenated regions. In addition, the handwriting capture interface can also optionally capture an electronic handwriting input based upon a position of the writing stylus with reference to a position-determining pattern. Each of the concatenated regions corresponds to a region of an identification pattern including a plurality of regions that are each associated with a character of an identifier associated with an object. The stroke includes a plurality of portions referenced to respective regions of the identification pattern such that the processing element can determine the identifier based upon the respective regions of the identification pattern, and associate the electronic input with the object associated with the identifier.

Abstract: A pen-enabled computing arrangement includes a handwriting capture interface and at least one processing element, such as in the form of a computing system and a digital pen that embodies a writing stylus. The handwriting capture interface can capture an electronic handwriting input. The processing element can sense an identifier associated with an object, and associate electronic handwriting input with the object. The processing element can then process the electronic handwriting input based upon the associated object. Printed paper with which the arrangement can operate to effectuate capturing and processing data may also be provided. Further, triggered verification of the sensed identifier may be provided when the identifier is sensed based upon initial electronic handwriting input corresponding to the identifier and the sensed identifier is unknown and/or improper.

Abstract: A radar imaging system is provided that directly measures the spatial frequency components of a scene via digital-beam-forming techniques applied along the cross-track dimension. Separate transmit and receive antennas provide increased integration time for the receive function, thus improving the signal-to-noise ratio. A segmented receive antenna is employed and processed as a series of interferometers sensitive to spatial frequency components of the scene corresponding to the separation between pairs of antenna elements. Range gating is used in the along-track dimension to divide the return from an illuminated swath into multiple range bins that may be processed independently. The system provides an improved signal-to-noise ratio and lends significant flexibility to the image formation process, improving the quality of the radar imaging. An embodiment having multiple transmit antennas is also provided that enables the generation of three-dimensional stereoscopic radar images.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes though the prism, wherein the color splitting-converging prism includes a dichroic coating having multiple layers of high and low index of refraction and ¼ wavelength thickness at each desired angle of incidence for reducing dichroic shift and thereby minimizing light loss.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes though the prism, wherein the color splitting-converging prism includes a dichroic coating having multiple layers of high and low index of refraction and ¼ wavelength thickness at each desired angle of incidence for reducing dichroic shift and thereby minimizing light loss.

Abstract: According to one aspect of the invention, a system is provided which includes an adaptive compensation component and a conversion component. The adaptive compensation component performs spectral and linearity compensation on input digital signals to generate output digital signals that are compensated against spectral and linearity variations in the system. The conversion component is coupled to the adaptive compensation component and performs conversion between digital and analog formats. The conversion component receives digital signals generated by the adaptive compensation component and converts the received digital signals to analog format. The conversion component also receives analog signals and converts the received analog signals to digital format for inputted to the adaptive compensation component.

Abstract: The present invention provides for operation of a digital communication receiver having multiple operational modes so that power consumption of the system can be kept at a minimum by using the lowest power operation for the system components performing tasks associated with each of the respective one of the multiple operational modes. An example is the receiver A/D converter operation with the lowest power to provide the desired resolution. Also, the invention provides novel architectures for implementing scalable resolution A/D converters. Furthermore, the invention generally includes a novel architecture for controlling the dynamic range of an A/D converter. In addition, the invention generally involves novel architectures for controlling the dynamic range of an A/D converter to alleviate difficulties associated with AGC control loops. Multiple exemplary embodiments are disclosed.

Abstract: This invention relates to matched instruction set processor systems and method, system, and apparatus to efficiently compile hardware and software designs. A method to efficiently design and implement a matched instruction set processor system includes analyzing and mapping design specifications of the matched instruction set processor into application components, wherein each application component represents a reusable function commonly used in digital communication systems. The method further includes decomposing the matched instruction set processor system into interconnected design vectors. The method also includes examining fields of the interconnected design factors and mapping the interconnected design vectors into specific hardware and software elements.

Abstract: A dual lamp coupling system is provided using a single equilateral 60 degree triangle prism in front of the integrator rod to homogenize the focused light from two lamps, with increased projection brightness. According to one embodiment, the equilateral 60 degree triangular prism is integrated into the end of the rod.

Abstract: A projector system includes an image generator and at least one projector for receiving an image from the image generator and projecting the image onto a screen to provide a final projected image. A computer generates correction data based on a calibration process that includes comparing an uncorrected image projected by the at least one projectors with a geometrically correct image. Wherein the at least one projector maps incoming pixel locations from the image generator to corrected pixel locations in the final projected image based on the correction data.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes though the prism, wherein the color splitting-converging prism includes a dichroic coating having multiple layers of high and low index of refraction and ¼ wavelength thickness at each desired angle of incidence for reducing dichroic shift and thereby minimizing light loss.

Abstract: A filter mounting apparatus for use with an optical filter placed between a projector lens and screen. The filter mounting apparatus comprises a metallic disk connected to the projector lens, and an assembly magnetically connected to the metallic disk for mounting the optical filter a predetermined distance from the projector lens.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes though the prism, wherein a dust-sealed airspace is provided between an imaging surface of each light valve and the prism for providing air channels to cool respective ones of the light valves.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes through the prism, wherein a dust-sealed airspace is provided between an imaging surface of each light valve and the prism for providing air channels to cool respective ones of the light valves.

Abstract: A system is provided that includes a pen-enabled computing arrangement having a capture interface and at least one processing element. The capture interface can capture an electronic input defining a stroke through a plurality of concatenated regions. In addition, the handwriting capture interface can also optionally capture an electronic handwriting input based upon a position of the writing stylus with reference to a position-determining pattern. Each of the concatenated regions corresponds to a region of an identification pattern including a plurality of regions that are each associated with a character of an identifier associated with an object. The stroke includes a plurality of portions referenced to respective regions of the identification pattern such that the processing element can determine the identifier based upon the respective regions of the identification pattern, and associate the electronic input with the object associated with the identifier.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes though the prism, wherein the color splitting-converging prism includes a dichroic coating having multiple layers of high and low index of refraction and ¼ wavelength thickness at each desired angle of incidence for reducing dichroic shift and thereby minimizing light loss.

Abstract: A mobile data system having automated shutdown is mounted in a motor vehicle having a vehicle motor and a vehicle electrical power source. The vehicle electrical power source provides variable voltage electrical power to the motor vehicle and to the mobile data system. The mobile data system includes a system computer for informational data retrieval in response to user input queries, a system interface device, and a computer power supply. The computer power supply is electrically coupled with the vehicle electrical power source through the system interface device to convert the variable voltage electrical power to voltage regulated electrical power for operation of the system computer. The system interface device creates parameter comparison data, in response to which the system computer creates a system shutdown command.