Abstract: An electronic transmitter includes: a generator circuit to generate a baseband signal; a modulator circuit to modulate a carrier signal with the baseband signal; an emitter to emit the modulated signal at an intended recipient; and a distortion circuit to apply a final distortion to the baseband signal or the modulated signal. The final distortion is optimized to minimize the ability of unintended recipients to localize the emitter using correlation-based techniques, and to minimize any degradation to the data rate of the emitted signal at the intended recipient. In some cases, the transmitter is part of an electronic communication system that also includes a receiver at the intended recipient. The receiver is aware of the final distortion and includes a collector to collect the emitted signal, and a demodulator circuit to demodulate the collected signal using the final distortion to recover the baseband signal.

Abstract: The invention relates to a cast explosive composition. A process for formulating a homogenous crosslinked polymer bonded explosive composition comprising the steps of: i) forming an admixture of precure castable explosive composition, comprising an explosive material, a polymerisable binder, and a cross linking reagent which comprises at least two reactive groups each of which is protected by a labile blocking group, wherein the labile blocking groups, comprise at least one resonant acoustic mixing stimulus labile linkage, ii) applying resonant acoustic mixing stimulus to the admixture, causing the at least one resonant acoustic mixing stimulus labile linkage to be removed and release said cross linking reagent, to cause the cure process to start.

Abstract: A multiple resolution focal plane array, the multiple resolution focal plane array having a plurality of bolometers and a readout integrated circuit connected to the plurality of bolometers, wherein the readout integrated circuit is configured to accumulate signal-induced current collected from each bolometer during an integration interval and then transfer the resultant signal onto output taps for readout. The readout integrated circuit is configured to allow a selection between at least two bolometer configurations, a first configuration where bolometers are combined into pixels comprising N×N series/parallel groupings of bolometers and a second configuration where the bolometers are used individually, forming pixels comprising only a single bolometer.

Abstract: A cavity system, comprising: a cavity (2) comprising a cavity opening; and an acoustically reflective structure (18, 20) located at least partially within the cavity (2), the acoustically reflective structure (18, 20) comprising one or more acoustically reflective surfaces (24, 26, 30, 32), each acoustically reflective surface (24, 26, 30, 32) being oblique to a plane of the cavity opening (27). The one or more acoustically reflective surfaces (24, 26, 30, 32) may be arranged to reflect incident acoustic waves out of the cavity opening while avoiding reflection into a region (48) at or proximate to a leading edge (14) of the cavity (2).

Abstract: The following invention relates to occupant recovery from an armoured land vehicle, and to a system for occupant recovery.

Abstract: The invention relates to a cast explosive composition, particularly to a pre-cure castable explosive composition comprising an explosive material, a polymerisable binder, a microencapsulated cross linking reagent, said microencapsulated cross linking reagent, comprising a cross linking agent encapsulated in a microcapsule.

Abstract: A compander including a module configured to compress a range of amplitudes of a signal in accordance with a companding function derived using a calculus of variations approach and method for deriving the companding function.

Abstract: According to the present invention, there is provided an electroacoustic transducer, comprising: a first electrode; a second electrode; a piezoelectric material at least partially sandwiched between the first electrode and the second electrode; and an optical aperture extending through the electroacoustic transducer, to allow for optical communication to take place through the electroacoustic transducer.

Abstract: A method of producing an aircraft battery system, the method comprising: identifying a volume of free space on an aircraft (100); arranging a plurality of electrical power cells (112, 114) such that the plurality of cells (112, 114) are capable of fitting into the identified volume, wherein the arrangement of cells (112, 114) has a non-cuboid shape; fixing the plurality of cells (112, 114) together such that the relative positions of the electrical power cells (112, 114) are maintained; electrically connecting the plurality of cells (112, 114) together, thereby to provide a battery (102, 104); and electrically connecting a DC-to-DC converter (106, 108) to the battery (102, 104), the DC-to-DC converter (106, 108) being configured to control a voltage of the battery (102, 104) to be equal to a specified voltage or within a specified voltage range.

Abstract: An electro-optic window is provided, together with a method of manufacturing the window. The window (3) is made of a material substantially transparent to at least one of infra-red, visible and UV radiation and treated to have reduced RF/MICROWAVE transmission characteristics by the provision of a grid (1) set into at least one surface (2) thereof. The grid (1) is formed of a material selected to be either reflective or absorptive to RF/MICROWAVE radiation.

Abstract: A system and method for cryptographic verification of entity/vehicle authenticity, comprising generating a Vehicle Identification Number (VIN)—Key for an individual platform/vehicle; applying the VIN—Key to components of the platform/vehicle; receiving input for the platform/vehicle; validating the authenticity of the input and/or the platform/vehicle; performing the operation of the input if it was validated; terminating the operation if it was not validated; logging the operation; and decommissioning the platform/vehicle at the end of life.

Abstract: An obstacle sensing lidar system includes: a laser source to emit laser radiation in a horizontal fan-beam pattern of at least 60° at an angle of elevation in front of a moving platform; a sensing device having an array including a row of 100 or more near-infrared (NIR) sensors to sense corresponding reflections of the emitted laser radiation off obstacles in front of the moving platform, each NIR sensor being a pixel in the array; and elevation circuitry to adjust the angle of elevation of the emitted laser radiation to a first angle of elevation, a second angle of elevation greater than the first angle of elevation, and a third angle of elevation greater than the second angle of elevation. Sometimes, the first angle of elevation corresponds to the surface level, the second elevation angle corresponds to the platform level, and the third elevation angle corresponds to the horizon level.

Abstract: There is disclosed an IR illumination device and munitions comprising the same. There is provided an IR illumination munition device for selective activation where upon activation the device emits IR radiation in the range of wavelengths of from 750 nm to 900 nm, the device comprising: an electrical power source; an array of IR light emitting diodes to emit the IR radiation.

Abstract: A method and apparatus are provided for generating image data for output to a display device such as an HUD or HMD defining pixels of an image for display. The image data for each pixel defines a predetermined background colour or a non-background colour. In an example implementation, the image generator comprises at least one image rendering module and a memory accessible by the at least one rendering module providing at least one frame buffer in which image data may be assembled. The at least one rendering module is arranged to process or to generate image data using a tile representation of an image for display, each tile comprising image data defining each of a predetermined number of pixels of the image.

Abstract: An asynchronous medium access control layer scheduler increases efficiency for directional mesh networks by removing extra overhead in the time slots. The efficiency is increased by dividing time slots into sub-slots to allow for a receiving node to be offset by at least one sub-slot from the transmitting node. This enables the scheduler to more efficiently schedule operations for the nodes so that nodes can be performing other functions rather than waiting to receive a transmission or waiting after transmitting a transmission. The sub-slots may be sized to approximate the transmission propagation time or time of flight delay.

Abstract: A vehicle battery thermal management system and method providing active internal air cooling includes a heat exchanger mounted within an exterior wall of the battery enclosure. The heat exchanger has a first set of heat exchanger elements extending externally to the battery enclosure and in fluid communication with external ambient air. The heat exchanger has a second set of heat exchanger elements extending internally to the battery enclosure and in fluid communication with internal air within the battery enclosure. The system includes at least one of an external damper door and an internal damper door. The external damper door is configured to control the flow of the external ambient air into the first set of heat exchanger elements. The internal damper door is configured to control the flow of the internal air into the first set of heat exchanger elements.

Abstract: A tile assembly (22) which, in use, is fitted to a base structure to form at least part of a fluid washed surface. The tile assembly comprises a housing (42) with at least one plenum (45) being provided within the housing (42). A wall (44) of the housing (42) is provided with a plurality of flow passages (46) which extend from the plenum side of the wall (44) to an outer surface (48) of the wall. Flow passage closures (50) are provided which are operable to open and close at least some of the flow passages (46).

Abstract: A device for sealing a projectile guiding kit may be used with any kit having a rear unit and a front unit rotatably connectable to the rear unit thereof. The device may include an annular body adapted to envelope at least a front portion of the rear unit and at least a rear portion of the front unit of the kit. The device may include a flexible ring-shaped strip attached to an inner side and at a front end of the annular body and adapted to seal a gap between the rear unit and the front unit of the kit. The annular body may be adapted to slide towards the rear unit of the kit when subjected to a longitudinal acceleration that exceeds a predetermined acceleration value, thereby uncovering the gap and enabling uninterrupted rotation of the front unit with respect to the rear unit of the kit.

Abstract: A method and apparatus for generating, in an aircraft in flight, a feasibility display indicative of the feasibility of a weapon, the method comprising: providing a performance envelope for the weapon; determining, using the performance envelope, configuration data for configuring a generic algorithm; uploading the configuration data to the aircraft; generating feasibility data indicative of the feasibility of a weapon carried on the aircraft successfully engaging a target and/or the feasibility of a weapon carried on the target successfully engaging the aircraft; determining, on board the aircraft, using the same generic algorithm and the uploaded configuration data, one or more test criteria; performing, on board the aircraft, an assessment process including determining whether or not the feasibility data satisfies the one or more test criteria; and, based the assessment, using the feasibility data, generating the feasibility display.

Abstract: Techniques are disclosed for providing a secure computational platform that facilitates collaboration of assets from different asset providers without exposure of the assets to threats. The assets may be in the form of tools, models, simulations, and other computational assets, which can be used, for example, to perform trade studies. The secure computational platform provides for integration of the assets in a workflow, while protecting the assets during construction and execution of the workflow. In some instances, each asset in the workflow is executed in an IT infrastructure of the asset provider to which the asset belongs.