In this paper the choice between bending magnets and insertion devices as sample illuminators for a hard X-ray full-field microscope is investigated. An optimized bending-magnet beamline design is presented. Its imaging speed is very competitive with the performance of similar microscopes installed currently at insertion-device beamlines. The fact that imaging X-ray microscopes can accept a lar...

This paper reviews the concept of a forward-scatter radar (FSR) which exploits the enhanced bistatic radar cross-section of a target in the forward direction (as opposed to the conventional back-scatter direction). FSR has the potential to reliably detect and track small air-vehicles with high sensitivity. Fundamentals of radar (including monostatic, bistatic, and multistatic) and a brief histo...

Two-dimensional (2D) Talbot array illuminators (TAIs) were designed, fabricated, and evaluated for high-resolution high-contrast x-ray phase imaging of soft tissue at 10–20 keV. The TAIs create intensity modulations with a high compression ratio on the micrometer scale short propagation distances. Their performance was compared various other wavefront markers in terms period, visibility, flux e...

Owing to the global coverage and high visibility of navigation satellite systems (GNSS), passive radar using GNSS satellites as transmitters opportunity has shown great potential for moving target detection, its possibility detect short-range maritime targets been verified. Nevertheless, existing methods always require tens seconds echo integration, which is not ideal detection with maneuverabi...

This article provides a survey of recent results on exploiting parametric auto-regressive (AR) models for adaptive radar target detection. Specifically, three types systems are considered, including phased-array with multiple co-located transmitters and receivers, distributed multi-input multi-output (MIMO) widely spatially separated passive which uses existing sources as illuminators opportuni...

The ability to emplace stand-alone payloads in hostile territory has long been on the wish list of US warfighters. This type of activity is often conducted at great danger. We have developed a capability for automated payload placement from unmanned ground vehicles (UGVs) using the Automatic Payload Deployment System (APDS) that can greatly reduce this danger. For example, payloads equipped wit...

In this paper, the problem of spectrum sensing using energy detection over cascaded Nakagami -m fading channels was addressed where all terminals are considered as vehicles. Closed-form expressions of detection probability were derived based on probability density function method. The validity of theoretical analyses was shown by comparing numerical results with Monte-Carlo simulations. The res...

As a reliable personal identification method, iris recognition has been widely used for a large number of applications. Since a variety of iris devices produced by different vendors may be used for some large-scale applications, it is necessary to match heterogeneous iris images against the variations of sensors, illuminators, imaging distance and imaging conditions. This paper aims to improve ...

Abstract: The formula of the Generalized Ambiguity Function (GAF) of passive bistatic SAR 11 system using the non-cooperative illuminators which transmit PSK modulating signals is derived 12 to analyze the spatial resolution of the system. The average GAF is introduced to remove the effect 13 of particular sequence of symbols on resolution because the particular sequence of symbols is 14 usuall...