Bae Systems Information and Electronic Systems Integration Inc.

Stephen Robert Blatt

Apurva N Mody

Diane Grieselhuber Mills

Thomas P McElwain

Ned B Thammakhoune

Paul Hoff

A method and system of cognitive communication for generating non-interfering transmission, includes conducting radio scene analysis to find grey spaces using external signal parameters for incoming signal analysis without having to decode incoming signals. The disclosed cognitive communications system combines the areas of communications, signal processing, pattern classification and machine learning to detect the signals in the given spectrum of interests, extracts their features, classifies the signals in types, learns the salient characteristics and patterns of the signal and predicts their future behaviors. In the process of signal analysis, a classifier is employed for classifying the signals. The designing of such a classifier is initially performed based on selection of features of a signal detected and by selecting a model of the classifier.

Cognitive radio methodology, physical layer policies and machine learning

In a method of cognitive communication for non-interfering transmission, wherein the improvement comprises the step of conducting radio scene analysis to find not just the spectrum holes or White spaces; but also to use the signal classification, machine learning and prediction information to learn more things about the existing signals and its underlying protocols, to find the Gray space, hence utilizing the signal space, consisting of space, time, frequency (spectrum), code and location more efficiently.

A safe, reliable and rapid system for the detection of nuclear materials within containers includes the use of pulsed high-intensity gamma rays that can penetrate a container and its contents and can be detected outside the container to provide a display in which high-Z material, including lead, uranium, plutonium and other nuclear substances that absorb gamma rays are detected as black regions on the display. In one embodiment, orthogonal pulsed gamma ray beams illuminate the container from two different directions to provide three-dimensional slices from which the existence and location of nuclear threat materials can be ascertained in as little as four seconds for a 40-foot container.

Method and apparatus for the safe and rapid detection of nuclear devices within containers

A system is provided for detecting the presence of two or more acoustic sources or targets such as vehicles that are traveling between an array of unattended passive ground sensors, in which the sensors each include a phased-array microphone and processing to determine the bearing to the acoustic target. The bearings from pairs of these sensors are subtracted one from the other to provide a bearing line difference &ldquo;delta&rdquo; which is the indicator of the presence of an acoustic target close to the line between the two sensors of the pair. A tripwire threshold indicating the presence of a target is set when the absolute value of this bearing line difference &ldquo;delta&rdquo; is greater than, for instance, 150&deg;, with the &ldquo;delta&rdquo; being 180&deg; when the target is on the line between the two sensors. By processing the outputs from multiple pairs of sensors the presence of multiple acoustic targets can be ascertained since the bearing line difference &ldquo;delta&rdquo; will result in detected targets only when a target is within a small and controllable lateral distance off of the line between the sensors in the pair.

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Bedford, NH, United States of America

Stephen Robert Blatt