Abstract: A waveguide feed structure having a coaxial transmission line. A conductive, planar septum is disposed in, and along a diameter of, the transmission line. A feed port is electrically coupled to the transmission line. The septum has a rear portion disposed proximate the feed port, such rear portion of the septum extending between the inner conductor and the outer conductor. The feed port and the rear portion of the septum are arranged to establish an electric field in the transmission line between the inner conductor and the outer conductor with a component substantially TE11 mode along a direction perpendicular to the planar septum. A forward portion of the septum is asymmetrically disposed with respect to said diameter in order to provide a gap between the inner conductor and the outer conductor, such gap establishing an electric field component within the transmission line having a TE11 component along said diameter of the transmission line parallel to the plane of the septum.

Abstract: An antenna feed that transmits in a single vertical or horizontal linear polarization at commercial Ka-band while simultaneously receiving both vertical and horizontal polarizations at commercial KU-band is presented. The antenna feed includes a metal feed horn, an integrated corrugated ring filter, an outer conductor disposed coaxially about the feed horn, a hollow inner conductor disposed coaxially within the feed horn and a polyrod disposed within the hollow inner conductor. The antenna feed further includes a PCB having receive channel RF probes, 180-degree hybrid combiners and LNB circuitry. The PCB is surrounded by a housing which is attached to the feed horn.

Abstract: A backup and restore system includes a work item server for restoring multiple work times simultaneously. The work item server assigns each work item to a respective trail queue based upon the commonality of the volumes on which the work items are stored. The work item server allocates drives to the trail queues for restoring multiple work items simultaneously. The trail queue have drives assigned for work items in that trail queues to use during a restore. The trail queue has a concurrency defined to predetermine the number of simultaneous work items can run that are associated with the trail queues. Drives can be allocated to the trail queues for executing work item restores associated with the respective trail queues until a predetermined trail queue concurrency is reached.

Abstract: An image search and retrieval system and method of operation within such a system are disclosed. The image search and retrieval system includes a search engine coupled to an image analyzer, an input system, an output system and an image database. The image search and retrieval system includes one or more feature modules which define particular regions of an image and particular measurements to make on pixels within the defined image region as well as the measurements to make on neighboring pixels in neighboring image regions for a given application and communicate this application specific information to the image analyzer thereby allowing rapid comparisons of images.

Abstract: A prefetch process that generates prefetch tasks for short sequences that are no longer than n tracks in length. The value of n is selected as 8. The prefetch process maintains a history of short sequences, uses that history to predict an expected length of a current sequence and generates a short prefetch task based on that prediction. The historical short sequence data is stored in histograms, each histogram being associated with a different logical volume. The histograms store a cumulative count of sequence occurrences of a given sequence length for each sequence length in a range of 1 track to n tracks. The process applies a probability-based threshold to its prediction to control the aggressiveness of the prefetch task to be generated. The threshold is adjusted based on system activity level metrics, such as processor utilization and average memory access time.

Abstract: This invention relates to an adaptive detection system and method for analyzing range-doppler-azimuth data for target detection. The detection system has a threshold calculator for calculating a threshold value that is based on the standard deviation of the range-doppler-azimuth data and a predetermined probability of detection. The detection system also has a detection module in communication with the threshold calculator to receive the threshold value. The detection module calculates an estimated target amplitude and an estimated noise floor amplitude based on the range-doppler data that is located in a detection window. The detection module detects a target when the difference between the estimated target amplitude and the estimated noise floor amplitude is larger than the threshold value.

Abstract: An electro-optical system includes a plurality of electromagnetic gain media having a corresponding plurality of apertures. The apertures are disposed in a predetermined spatial distribution. The system further includes a refracting surface disposed to intercept energy from the plurality of apertures and a partially reflecting surface to direct portions of the intercepted energy back toward the plurality of apertures with the directed energy being distributed about the plurality of apertures.

Abstract: A system and method wherein a torque monitoring algorithm compares torque demand (i.e., driver-demanded torque computed primarily from acceleration pedal position), with two independent torque estimates (e.g., one estimated from throttle position and one estimated from mass airflow (MAF) to the intake manifold). If the maximum of the two actual torque estimates exceeds the driver-demanded torque, the monitoring algorithm logic intervenes in engine torque production (e.g., shuts off fuel to cylinders) and lights a service (wrench) light. In order to prevent, or minimize, unnecessary engine torque production intervention, reducing a torque demand signal to the throttle by a factor, such factor being a function of airflow meter load divided by throttle load.

Abstract: A docking information system disposed on a ship provides navigational information to the operator of the ship. The system includes a short range radar system and a display to provide a range between the ship and a dock or an obstacle and, optionally, a relative velocity between the ship and the dock or the obstacle.

Abstract: A radar transmitter includes a digital ramp generator circuit for generating a VCO control signal. The ramp generator includes a digital signal processor and a digital-to-analog converter. In one embodiment, the VCO output signal is up-converted to provide the transmit signal and in another embodiment, the VCO operates over the transmit frequency. Also described is a VCO comprising a DR and a phase shifter. A temperature compensation feature includes detecting the transmit frequency and comparing the DSP output generating the detected frequency to a DSP output stored in association with the detected frequency. Also described is a technique for compensating for non-linear VCO operation in which the DSP output words are adjusted to provide a waveform complementary in shape to the non-linear VCO characteristic. Susceptibility of the radar to interference is reduced by randomly varying at least one parameter of the ramp signal, such as offset interval or voltage range, in at least one ramp signal cycle.

Abstract: In accordance with the present invention, an adaptive cruise control system includes a radio frequency (RF) transmit receive (TR) sensor module (or more simply “sensor”) disposed such that a detection zone is deployed in front of a vehicle. The sensor includes a sensor antenna system which comprises a transmit antenna for emitting or transmitting an RF signal and a receive antenna for receiving portions of the transmitted RF signal which are intercepted by one or more objects within a field of view of the transmit antenna and reflected back toward the receive antenna. With this particular arrangement, a detection system that detects objects in a region about a front of a vehicle is provided. If the system determines that the vehicle is approaching an object or that an object is approaching the vehicle, then the sensor initiates steps that are carried out in accordance with a set of rules that control an accelerator of the vehicle.

Abstract: A microwave window structure for a low-pressure chamber is provided. The window structure enables microwave energy to be introduced into the chamber from a source external to the chamber. The window structure includes a fixture having electrically conductive walls. Inner portions of the walls provide a peripheral region of an aperture within such fixture. The fixture is adapted for mounting to a sidewall portion of the chamber. A solid, microwave energy transparent dielectric window is included. The window includes: a periphery portion affixed to the fixture; and, an inner region disposed within the aperture of the fixture.

Abstract: A backup and restore system forms a persistent submit object from objects marked for restoration by a user. The submit object encapsulates the information needed to restore the work items contained in the submit object. The submit object enables restore execution to be independent from the browse, mark and submit operations. The submit object also allows multiple restore requests to be submitted.

Abstract: A data communication system comprising a plurality of fiber optic cables and a fiber optic switching system, comprising: a support structure for securing light emitting/light receiving ends of the plurality of fiber optic cables in predetermined positions; and, means for re-directing light emitted from the light emitting/light receiving end of one of the fiber optic cables to the light emitting/light receiving ends of one, or more than one, of a plurality of the plurality of fiber optic cables. The re-directing means includes means for collimating and directing the light emitted from the end of one of the cables as a beam propagating along a predetermined direction and for re-directing the beam towards the end of another one of the cables selectively in accordance with an electrical signal. More particularly, the re-directing means includes electro-optical phase shifting medium, preferably liquid crystal molecules.

Abstract: Two types of shared-field multipliers for performing multiplications on field elements of different sizes are presented. One type uses a “cyclic” Galois field GF(2m), that is, a Galois field GF(2m) generated by an irreducible polynomial xm+xm−1+xm−2+ . . . +x+1, and the other type uses a composite field structure. Each shared-field multiplier includes computation circuitry for receiving field elements as inputs, the computation circuitry being responsive to a control signal to perform computations based on the inputs having a first size to produce an output of the first size, or to perform computations based on the inputs having a second, different size to produce an output of the second size.

Abstract: A sigma delta modulator having an integrator with a first input for coupling to an analog signal and a second input for coupling to a reference voltage. A comparator is provided having a first input coupled to an output of the integrator and a second input for coupling to the reference voltage. The comparator produces signal having a logic state in accordance with the relative magnitude of signals at the first and second inputs thereof. The logic state is latched at the output of such comparator during latching transitions in a series of latching pulses fed to the comparator. A one-bit quantizer is provided for storing the logic state of at the output of the comparator at sampling transitions of a series of clock pulses fed to the one-bit quantizer. The series of clock pulses and the series of latching pulses are synchronized one with the other. Each one of the latching transitions occurs prior to a corresponding one of the sampling transitions.

Abstract: A beat detection system provides tactile stimulation in response to musical characteristics and in particular to repetitive musical beat information. The device processes multiple acoustic bands and separates out the beat information from each band. Each band provides beat information to respective tactile mechanisms that convey the beat information to the user. The device can be worn by a person with a hearing disability to enable them to appreciate the beat of music.

Abstract: A method of using a computer to analyze an extended finite state machine model of a system includes receiving at least one requirement expression, determining at least one path of states and transitions through the model, evaluating at least one of the requirement expressions based on at least one of the determined paths through the model to determine whether the path satisfies the requirement expression, and generating a report based on the evaluating.

Abstract: A magnet structure including a magnet and an integral magnetically permeable concentrator and methods for making the same are provided. The concentrator is comprised of a plastic loaded with one or more magnetically permeable materials to a percentage suitable for providing desired magnetic field characteristics. The magnetic element may be comprised of a conventional magnetic material or a plastic loaded with one or more magnetic materials. An insert molding technique is described in which either the concentrator or magnetic element is prefabricated and inserted into a mold which is subsequently filled with a loaded plastic to provide the other component of the magnet structure. In an alternate fabrication technique, both the concentrator and magnet are sequentially formed by injection molding in the same mold. Also described is a magnet structure including a ring magnet having a central aperture in which a steel rod is disposed.

Abstract: A proximity detector includes an offset circuit for bringing at least one of a magnetic field signal and a tracking signal towards the other one of the magnetic field signal and the tracking signal when the detector output signal changes state. A magnetic field-to-voltage transducer provides the magnetic field signal indicative of an ambient magnetic field and a peak detector responsive to the magnetic field signal provides the tracking signal which substantially follows the magnetic field signal. A comparator generates the detector output signal which changes state when the magnetic field signal varies from the tracking signal by a predetermined amount.