Abstract

A magnetic resonance detection (MRD) system for and methods of detecting and classifying multiple chemical substances is disclosed. In one example, the presently disclosed MRD system is a nuclear quadrupole resonance (NQR) detection system that provides multi-frequency operation for substantially full coverage of the explosive NQR spectrum using a broadband transmit/receive (T/R) switch (or duplexer) and a single multi-frequency radio frequency (RF) transducer. More particularly, the MRD system provides a frequency-agile system that can operate over a wide band of frequencies or wavelengths. Further, a method of detecting and classifying various chemical substances is provided that includes pulse sequencing with “frequency hopping,” phase cycling for reducing or substantially eliminating background noise, and/or a process of mitigating amplitude modulation (AM) radio interference.

IPC Classes  ?

• G01R 33/44 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
• G01R 33/36 - Electrical details, e.g. matching or coupling of the coil to the receiver

Abstract

A signal processing system includes a random decision forests-based bulk filter. The signal processing system further includes one or more sensors (e.g., radar systems, satellite systems) that interface with the signal processing system via a radio frequency (RF), electro-optical (EO) or infrared (IR) exchange process, a computationally inexpensive object detector, a computationally inexpensive state estimator, then the random decision forests-based bulk filter, a computationally expensive object tracker, a computationally expensive object discriminator, and a report. Further, the random decision forests-based bulk filter features a filter training optimization process.

IPC Classes  ?

• G01S 7/41 - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisationTarget signatureTarget cross-section
• G01S 13/72 - Radar-tracking systemsAnalogous systems for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar
• G01S 13/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
• G01S 13/88 - Radar or analogous systems, specially adapted for specific applications
• G01S 7/292 - Extracting wanted echo-signals
• G01S 13/42 - Simultaneous measurement of distance and other coordinates

Abstract

An apparatus and method of recoil mitigation for a gun mounted on a lightweight platform is disclosed.

IPC Classes  ?

• F41A 25/20 - Hydropneumatic systems
• F41A 25/16 - Hybrid systems
• F41A 25/06 - Friction-operated systems
• F41A 25/02 - Fluid-operated systems
• F41A 25/22 - Bearing arrangements for the reciprocating gun-mount or barrel movement
• F41A 25/26 - Assembling or dismounting recoil elements or systems

Abstract

A spatial modulator for RF beams (microwave (uW), millimeter wave (MMW), and sub-millimeter wave (sub-MMW)) using dynamically-writable highly-reflective regions, with sub-wavelength diffractive pattern spatial definition that is finer than the wavelength of the incident RF beam.

IPC Classes  ?

• H01Q 19/10 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
• H01Q 15/14 - Reflecting surfacesEquivalent structures

Abstract

A method and apparatus for firing a plurality of disrupter loads in arbitrary order at the discretion of the user is disclosed. The loads may be of the same or different types. Both liquid and solid projectiles may be fired. Further, the disrupter may be operated by a user at safe standoff distance from a robotic mount with the aid of control, targeting, ranging and recoil systems.

IPC Classes  ?

• F41B 9/00 - Liquid ejecting guns, e.g. water pistols
• F41H 11/00 - Defence installationsDefence devices Means for clearing or detecting landmines
• F41A 21/06 - Plural barrels
• F41A 29/04 - Lubricating, oiling or greasing means, e.g. operating during use

Abstract

A photonic implementation of the modulated wideband converter (MWC) is described. The highly scalable compressive sensing receiver architecture uses photonic components for analog front-end compression and downconversion, allowing scalable data conversion over an extremely wide instantaneous surveillance bandwidth, limited only by the peak anticipated signal occupancy and application-dependent size, weight, and power constraints.

IPC Classes  ?

• H04J 14/02 - Wavelength-division multiplex systems
• H04B 10/67 - Optical arrangements in the receiver
• H04B 10/69 - Electrical arrangements in the receiver

Abstract

Methods and apparatus for detecting the presence of electronic communications devices, such as cellular phones, are disclosed. In an exemplary method, a complex radio frequency stimulus is transmitted into a target area, and nonlinear reflection signals received from the target area are processed to obtain a response measurement. The response measurement is compared to a pre-determined filter response profile to detect the presence of a radio device having a corresponding filter response characteristic. In some embodiments, the pre-determined filter response profile comprises a pre-determined band-edge profile, so that comparing the response measurement to a pre-determined filter response profile comprises comparing the response measurement to the pre-determined band-edge profile to detect the presence of a radio device having a corresponding band-edge characteristic.

IPC Classes  ?

• H04B 1/16 - Circuits
• G01S 13/74 - Systems using reradiation of radio waves, e.g. secondary radar systemsAnalogous systems