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There exist a lot of methods for vision through an opaque medium. At present UWB (Ultra-Wideband) technology is used more and more because it is suitable for localization and detection of a human body behind a wall. First of all this paper describes known methods for vision through walls, which can be divided into two general groups imaging and non-imaging systems. Secondly it describes the sta...

The effects of different UWB antennas on body area propagation channel is analyzed. Different orientations of directional antennas and different spacings 13 between planar antennas and the body are investigated in an on-body scenario. Time domain channel parameters, e.g. mean delay and delay spread, are 15 extracted from measurement data. The distribution of the channel parameters allows classi...

This paper investigates a certain class of threedimensional (3-D) (volume) sources to the scalar wave equation that are capable of radiating high-amplitude short-duration pulses in a selected (main) direction and low-amplitude longduration pulses in other directions. Parameterization and characterization of such sources and the fields that they radiate is carried out in both the frequency and t...

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The IEEE 802.15.3 specification is proposed for short-range high-speed Wireless Personal Area Networks (WPANs). Furthermore, it is proposed by the IEEE 802.15.3 a task group for Ultra-Wideband (UWB) transmission, which is an emerging wireless technology for future indoor and outdoor applications. This paper gives a survey on various security aspects and mechanisms in the IEEE 802.15.3 WPANs. It...