Abstract: A method and apparatus for registering a first image having a first plurality of pixel values from a sensor having a plurality of pixels and a second image having a second plurality of pixel values of the plurality of pixels is disclosed. The method includes selecting a first image having a first plurality of pixel values and a second image having a second plurality of pixel values, grouping the first plurality of pixels according to a grid having a plurality of grid elements, each grid element having a plurality of pixels, determining a grid element displacement of the second image from the first image for each grid element of pixels, filtering the displacement of the second image from the first image to produce filtered valid grid element displacements and invalid grid element displacements, and determining a warping transform of each of the grid element displacements.

Abstract: Systems and methods for detecting and estimating parameters for a phase-modulated signal in a continuous manner with near-optimal performance. The methods generate these estimates using streaming (or on-the-fly) calculations and so are suitable for hardware-based implementation. These estimates can be used as part of standard pulse descriptor words for radar and other pulsed or continuous signals that are reported by an electronic warfare receiver to a processing and display system. Also, the methods can be computed using sub-sampling methods in order to reduce overall computations.

Abstract: A method and apparatus for frameless random-access image sensing. Instructions identifying a pixel detector in an array of pixel detectors and integration instructions for the pixel detector may be received by an image detector controller. Integration by the pixel detector may be controlled as defined by the integration instructions to generate pixel data by the pixel detector. The pixel data may be read from the pixel detector.

Abstract: An insulating shell designed to fit a variety of thermal expansion tanks which provides substantial insulation. The insulation shell includes a first half shell, a second half shell, and an interlocking mechanism. The first half shell and the second half shell join together to form an enclosed shell with a hollow interior. The first half shell and the second half shell each include a main body, a central cavity, and a hole. The main body provides the thermal insulation. The central cavity laterally traverses into the main body through a planar mating surface and receives the tank. The hole traverses into the main body from an external surface to an internal surface and received associated plumbing of the tank. The interlocking mechanism includes a first engaging element and a second engaging element, which are used to attach the first half shell and the second half shell together.

Abstract: A method for training a neural network to be configured to filter a multipath corrupted signal is provided. The method includes receiving, at the neural network, real or simulated multipath corrupted signal data, and training the neural network on the multipath corrupted signal data using a complex iterated least square thresholding algorithm (CILST) capable of processing both real and complex signals.

Abstract: A system for phased array signal beam tracking includes a phased array transmitter configurable for transmitting a signal beam at a selected transmit beam angle from a plurality of different transmit beam angles. The system also includes a beam gain angle coding assembly configured for modulation of a gain of the signal beam to produce a resulting gain profile of the signal beam. The resulting gain profile includes offset angle coding that indicates an offset incident angle of the signal beam at a receiving antenna.

Abstract: Systems and methods for detecting and estimating parameters for a phase-modulated signal in a continuous manner with near-optimal performance. The methods generate these estimates using streaming (or on-the-fly) calculations and so are suitable for hardware-based implementation. These estimates can be used as part of standard pulse descriptor words for radar and other pulsed or continuous signals that are reported by an electronic warfare receiver to a processing and display system. Also, the methods can be computed using sub-sampling methods in order to reduce overall computations.

Abstract: An air cleaner arrangement or assembly is provided. The air cleaner arrangement includes a serviceable filter cartridge. The air cleaner assembly also includes an arrangement for positioning the filter cartridge into a preferred, sealing, orientation and for securing the filter cartridge in that location. Preferred serviceable filter cartridges are provided, as well as methods of assembly and use.

Abstract: Systems and methods for processing a multitude of variable and varying signals in real time with low latency using fixed hardware with fixed processing resources, such as those within an application-specific integrated circuit (ASIC) or a field-programmable gated array (FPGA). The signal processing systems and methods allow the resource allocation to continuously adjust their processing as a result of changing signal conditions. In accordance with various embodiments, fixed processing resources in ASIC or FPGA form are dynamically allocated through an intelligent interleaving methodology that efficiently maps the signal processing of incoming signals while essentially preserving the same latency as if each signal channel were processed at the full sample rate. This is accomplished by multiplexing under the control of a resource sharing algorithm.

Abstract: An insulating shell designed to fit a variety of thermal expansion tanks which provides substantial insulation. The insulation shell includes a first half shell, a second half shell, and an interlocking mechanism. The first half shell and the second half shell join together to form an enclosed shell with a hollow interior. The first half shell and the second half shell each include a main body, a central cavity, and a hole. The main body provides the thermal insulation. The central cavity laterally traverses into the main body through a planar mating surface and receives the tank. The hole traverses into the main body from an external surface to an internal surface and received associated plumbing of the tank. The interlocking mechanism includes a first engaging element and a second engaging element, which are used to attach the first half shell and the second half shell together.

Abstract: A method of inspecting a wire contact includes determining, at a processor, a striation metric of a particular image of the wire contact. The particular image depicts an inspection hole in the wire contact. The method also includes comparing the striation metric to a wire-in-hole detection threshold and determining that a threshold number of visible wire strands are oriented along a particular axis in the inspection hole if the striation metric satisfies the wire-in-hole detection threshold.

Abstract: An air cleaner arrangement or assembly is provided. The air cleaner arrangement includes a serviceable filter cartridge. The air cleaner assembly also includes an arrangement for positioning the filter cartridge into a preferred, sealing, orientation and for securing the filter cartridge in that location. Preferred serviceable filter cartridges are provided, as well as methods of assembly and use.

Abstract: A system for phased array signal beam tracking includes a phased array transmitter configurable for transmitting a signal beam at a selected transmit beam angle from a plurality of different transmit beam angles. The system also includes a beam gain angle coding assembly configured for modulation of a gain of the signal beam to produce a resulting gain profile of the signal beam. The resulting gain profile includes offset angle coding that indicates an offset incident angle of the signal beam at a receiving antenna.

Abstract: A blind source separation (BSS) system comprises means for gathering wideband signal power spectral information without using special Fourier transform hardware/software systems and without using extremely large signal memories. The method involves taking the combined energy output of a large set of BSS filters that are operating under a blind source separation algorithm that looks for signals of interest, along with instantaneous filter characteristics such as center frequency, bandwidth and spectral response, and records a weighted spread energy into a frequency- and time-based histogram. This information can then be used to compare against the BSS signal output and signal energy which does not correspond to existing signal output is added to additional BSS signal output. This system can operate in real time, but uses long-term averaging to enhance signal detection.

Abstract: A method and apparatus for registering a first image having a first plurality of pixel values from a sensor having a plurality of pixels and a second image having a second plurality of pixel values of the plurality of pixels is disclosed. The method includes selecting a first image having a first plurality of pixel values and a second image having a second plurality of pixel values, grouping the first plurality of pixels according to a grid having a plurality of grid elements, each grid element having a plurality of pixels, determining a grid element displacement of the second image from the first image for each grid element of pixels, filtering the displacement of the second image from the first image to produce filtered valid grid element displacements and invalid grid element displacements, and determining a warping transform of each of the grid element displacements.

Abstract: A method of inspecting a wire contact includes determining, at a processor, a striation metric of a particular image of the wire contact. The particular image depicts an inspection hole in the wire contact. The method also includes comparing the striation metric to a wire-in-hole detection threshold and determining that a threshold number of visible wire strands are oriented along a particular axis in the inspection hole if the striation metric satisfies the wire-in-hole detection threshold.

Abstract: A method is provided of compensating for variations in distance and orientation between first and second wing-mounted cameras of an aircraft due to flexing of at least one aircraft wing. The method comprises determining a first distance and orientation between the first wing-mounted camera and the second wing-mounted camera during a neutral wing condition of the aircraft. The method further comprises determining a second distance and orientation between the first wing-mounted camera and the second wing-mounted camera during a flexed wing condition of the aircraft. The method also comprises processing the difference between the first and second distances and orientations to provide a real-time varying distance and orientation for use in providing a compensated distance between the first and second wing-mounted cameras.

Abstract: A blind source separation (BSS) system comprises means for gathering wideband signal power spectral information without using special Fourier transform hardware/software systems and without using extremely large signal memories. The method involves taking the combined energy output of a large set of BSS filters that are operating under a blind source separation algorithm that looks for signals of interest, along with instantaneous filter characteristics such as center frequency, bandwidth and spectral response, and records a weighted spread energy into a frequency- and time-based histogram. This information can then be used to compare against the BSS signal output and signal energy which does not correspond to existing signal output is added to additional BSS signal output. This system can operate in real time, but uses long-term averaging to enhance signal detection.

Abstract: A signal processing system is provided. The signal processing system includes a transmission architecture configured to transmit first and second signals, and a receiver architecture including an antenna configured to receive the signals, and a coherent signal fusion processing device communicatively coupled to the antenna. The processing device is configured to generate a broadband analog signal that contains the first and second signals, digitize the broadband analog signal, isolate first and second signals of interest, estimate, relative to a reference template, at least one of a time difference of arrival and a frequency difference of arrival for at least one of the first and second signals of interest, and determine a location of at least one of the transmission architecture and the receiver architecture based on the estimated at least one of a time difference of arrival and a frequency difference of arrival.

Abstract: Systems, methods, and apparatus for forming an antenna array are disclosed. In one or more embodiments, the disclosed method involves determining at least one coprime moduli set based upon a differential phase gain requirement and a differential phase range requirement for the antenna array. The method further involves producing at least one configuration for relative spacing of antenna elements of the antenna array by using at least one coprime moduli set. Also, the method involves choosing one of configurations for the antenna array to employ by evaluating a resultant gain and an unambiguous angle of arrival (AOA) for each of the configurations. Further, the method involves determining the absolute spacing of the antenna elements of the antenna array for the chosen configuration for the antenna array according to a wavelength requirement for the antenna array.