Abstract: A weather radar system coupled to a weather radar antenna, including a receive circuit for receiving radar returns received by the antenna and a processor for summing portions of the radar return data to obtain a null response. The processor adjusts the phase or power of at least one portion of the radar return data using a steering vector or a tuning vector.

Abstract: An enhanced vision system for an aircraft is disclosed. The invention includes a display apparatus having a display element positioned between the pilot and a scene. The display element permits the pilot to view the scene therethrough. A first sensor is mounted adjacent to the display element. The first sensor is configured to detect light having a first radiation spectrum emanating from a first portion of the scene. A second sensor is mounted upon the aircraft away from the display element. The second sensor is configured to detect light having a second radiation spectrum emanating from a second portion of the scene. The display element is configured to visually represent the detected light with the first radiation spectrum precisely conformal with the scene as viewed by the pilot. The display element is configured to visually represent the detected light with the second radiation spectrum substantially conformal with the scene as viewed by the pilot.

Abstract: A system and method of enabling digital beamforming (DBF) for use with RF receiver systems with a multi-element array antenna having short repetitive synchronizaton sequences in a noise and/or jamming environment.

Abstract: A Link 16 radio receiving system includes a first antenna, a second antenna, a combiner and a rake receiver. The combiner is coupled to the first antenna and the second antenna. The combiner provides a combined signal. The rake receiver is coupled to the combiner to receive the combined signal.

Abstract: An aircraft-based terrain display system includes a radar system configured to measure terrain data in proximity to an aircraft. The system further includes a memory coupled to the radar system and configured to store terrain data associated with the terrain data collected from the radar system. A processor is coupled to the memory and configured to use the terrain data stored in memory to generate a terrain image having a perspective view. An aircraft display coupled to the processor is configured to display the terrain image.

Abstract: A multiple security level power managed processing system and method of managing power consumption in a multi security level system is disclosed. The system includes a plurality of nodes having a processor, associated memory and a processor interface. A plurality of processors individually may include multiple independent processing security levels, such as a first processing level and a second processing level. A MILS processor-to-processor network connects the plurality of processors. The system may be configured to distribute the application among the processing levels corresponding to a specific level of security. Power management profiles are used to control operation of the processors to maximize power efficiency while meeting security criteria.

Abstract: A method of establishing an arterial sub-network of nodes in a communications network is disclosed. According to the method, the one-hop neighbor sets of each node are compared with the one-hop neighbor sets of the neighbors of each node, and a set of rules are applied to determine whether or not each node is to be part of the arterial sub-network.

Abstract: A cryptographic system, method, and device for implementing cryptographic functions designed to protect data is provided. The method includes (a) providing an algorithm processing unit, (b) executing a cryptographic algorithm at the algorithm processing unit using a first cryptographic datum and input data to form output data, (c) determining if a context switch command is received from a controller, (d) receiving a second cryptographic datum from a memory if the context switch command is received, (e) replacing the second cryptographic datum with the first cryptographic datum if the context switch command is received, and (f) repeating (b)-(e). The controller switches the processing state of the algorithm processing unit from one channel to another channel without leaking data between channels through execution of the operations each time a channel switch is selected. As a result, a single algorithm processing unit used with a controller can provide multiple independent levels of security.

Abstract: A radio frequency identification (RFID) system for allowing access to at least one remotely positioned target RFID tag. The RFID system includes an RFID repeater receiver located outside of the operable range of a target RFID tag; and, at least one RFID repeater positionable within an operable range of the target RFID tag. The RFID repeater retransmits an original inquiry from the RFID repeater receiver to the target RFID tag and retransmits a response from the target RFID tag to the RFID repeater receiver.

Abstract: The present invention is a method for providing a high-assurance guard in a partitioned processing system, the partitioned processing system including a first input/output partition, a guard function partition and a second input/output partition, the method including the steps of: receiving a data packet from the first input/output partition of the partitioned processing system via a first I/O interface; determining if the data packet is well-formed as defined by an interface control document; and forwarding the data packet to the second input/output partition of the partitioned processing system and to a second I/O interface only when the data packet is well-formed.

Abstract: A laser communications and position location system has a laser transmitter with a laser array radiating modulated laser beams upward at convergence angles that determine altitude of a free space junction where the beams converge. The free space junction scatters the modulated laser beams and a laser receiver receives the scattered modulated laser beam light and recovers the data. A modulator modulates the laser array with data. The laser transmitter may include a data link to transmit the free space junction position to the laser receiver to aid in finding it. The laser receiver has an optical detector with an adjustable field of view and gain to minimize background light noise and to demodulate the received modulated scattered laser beams. The laser receiver determines a precise location of the laser transmitter upon finding the free space junction.

Abstract: A head-up display (HUD) system for an aircraft is disclosed. The HUD comprises a computer receiving information representative of an aircraft flight path. The HUD also comprises a head-up display unit comprising a projector and a combiner. The combiner receives an image from the projector. An imaging sensor is coupled to the computer. The imaging sensor has a pointing direction and a field of view. A region of special processing is defined within the imaging sensor field of view. A program is running on the computer. The program determines an offset for the region of special processing. The offset is based on the aircraft flight path and the imaging sensor pointing direction. The offset is used in the computer to cause display region of special processing to be moved based on the direction of the aircraft flight path.

Abstract: An architecture for a spread-spectrum transmitter-receiver system in an advanced tactical data link that allows the receiver to readily acquire and synchronize to a desired LPD signal. Signal acquisition is performed with a cyclic range search that uses multiple redundant known sequences mapped to a known message sequence in a highly repeated manner. By employing the invariance of the speed of light, and synchronicity between transmitter and receiver, the architecture can significantly reduce the computational complexity of the receiver. Additionally, the architecture enables ad hoc channel access, controlled latency, distance estimation, and distance-directed transmissions.

Abstract: The present invention is an integrated monitoring and communication receiver architecture. A staring receiver in accordance with the present invention may include a RF front end and a memory for storage of channel samples. The staring receiver may be capable of staring across an entire hopped communications bandwidth and storing a time-duration of channel samples within the memory to enhance acquisition and demodulation processing. The staring receiver may provide simultaneous visibility and reception of multiple signals with different time and frequency hopping patterns. Additionally, the staring receiver may be capable of spoofing whereby false cross correlations are presented to thwart geographically diverse intercept receivers.

Abstract: A vehicle location determination system including a radio frequency identification (RFID) interrogator system positioned on a vehicle; and, a plurality of passive RFID tags positioned in an environment proximate to an intended path of the vehicle. The RFID interrogator system provides the capability of having the vehicle determine its location in the proximate environment based on the interrogation of the passive RFID tags. The present invention is particularly adaptable for use in an airport environment. It is not reliant on any type of ground based interrogation system. Instead, the airport surface movement area (i.e. taxiways, runways, ramps and gates) is only required to have a system of passive RFID tags.

Abstract: The present invention is directed to a secure gateway/router system and method for allowing a MLS network which simultaneously contains data of multiple security levels to interface with one of several MSLS networks which is configured to maintain data with a single security level. When the data is within the secure gateway/router system, the separation of the data by security levels, as it was received from the MLS network, is maintained by routing the data to a designated security level network. Secure gateway/router system includes several network interface units. Each network interface unit is configured to interface within a single MSLS network. Each MSLS software partition has a single and simple function to perform in maintaining separation of security levels and provide the data to the network interface unit configured to interface within the designated security level network.

Abstract: The present invention is an apparatus and method for simultaneously processing multiple communication and navigation signals. An apparatus of the present invention may comprise a single receiver with a direct radio frequency (RF) sampling front end, a single analog to digital converter, a digital downconverter and a digital signal processor. In an embodiment of the invention, the receiver of the present invention may simultaneously process navigation signals in the 108-118 MHz band and communication signals in the 118-137 MHz band.

Abstract: A common signal generating sub-system (CSGS) for a radio frequency (RF) receiver. The CSGS includes a down converter section and a digitizer section. The down converter section receives intermediate frequency (IF) signals and injection frequency signals from an RF/IF processing section of an RF receiver and translates the IF signals to analog intermediate frequency (IF) signals preserving the spectra thereof. The analog IF signals comprise analog in-phase IF signals and analog quadrature IF signals. The digitizer section utilizes a locally generated sampling rate signal (LGSRS) and converts the analog in-phase IF signals and the analog quadrature IF signals to a common digital in-phase IF signal and a common digital quadrature IF signal. The common digital IF signals can be subsequently processed by a digital processing section of the RF receiver.

Abstract: An avionics system includes a dynamic grammar definition subsystem configured to receive and analyze dynamic, current aircraft state data and provide an enhanced set of recognizable current grammar data based on the aircraft state data. A voice recognition subsystem is configured to receive the current grammar data from the dynamic grammar definition subsystem and utilize the current grammar data to provide commands in response to a user's voice input based on the aircraft's dynamic, current state.

Abstract: A novel and non-trivial system and methods for displaying partial images and non-overlapping images acquired by vision systems representing scene is disclosed. A system is disclosed for displaying partial images and shared, non-overlapping images on a display comprises a forward-looking imaging device system, an image system, a terrain rendering processor, and an indicating system. The terrain rendering processor determines, based on visibility data, which part of an image of one system will be displayed. A method is disclosed for displaying a partial image on a display unit. A terrain rendering processor determines acceptable and unacceptable visibility data based on contrast data of first image data, and based on such determination, presents image data corresponding to unacceptable data to the indicating system for presentation on a display unit. A second method is disclosed for displaying two images on a display unit of an aircraft.