A novel microcomputer-based ultrasonic distance measurement system is presented. This study proposes an efficient algorithm which combines both the amplitude modulation (AM) and the phase modulation (PM) of the pulse-echo technique. The proposed system can reduce error caused by inertia delay and amplitude attenuation effect when using the AM and PM envelope square wave form (APESW). The APESW ...

Current tracking methods rely on color-, intensity-, and edge-based features to compute a description of an image region. These approaches are not well-suited for low-quality images such as mm-wave data from full-body scanners. In order to perform tracking in such challenging grayscale images, we propose several enhancements and extensions to the Visual Tracking Decomposition (VTD) by Kwon and ...

Passive millimeter—wave detection is advantageous for detection of objects obscured by rain, steam or other aerosols. This coupled together with collision avoidance techniques, based on biologically inspired insect vision models, promises compact low—cost solutions that do not require hardware—intensive image processing. This paper examines a number of possible future directions by identifying ...

The use of wideband 60 GHz radio propagation channel will allow high data rates in future communication systems [1]. E.g., the 57...64 GHz frequency band will allow Gbit data rates for short-range wireless access. Indeed this frequency range offers huge bandwidths and, due to the oxygen absorption, improves frequency reuse in cellular networks compared to lower frequencies. Furthermore, array s...

We have developed a technique to measure low-power electromagnetic fields from mm-wave devices non-intrusively by combining metasurface, designed absorb power and focus the radiated in thermally isolated region, with an infrared (IR) camera. The metasurface consists of elements low mass highly emissive material for maximal IR conversion incident wave. camera captures converted energy indirectly...

A realistic performance assessment of any wireless communication system requires the use a fading channel model that reflects its main characteristics. The traditional Rayleigh and Nakagami-m models have been (and still are) basis most theoretical research on technologies today, even for emerging technologies, such as millimeter-wave communications (mm-Wave). In this article, we show fluctuatin...

Many of the emerging broadband wireless access systems operate at mm-wave frequencies where large allocations of spectrum are available. GaAs Monolithic Microwave Integrated Circuits (MMICs) offer a means of realising low cost, high performance, high volume, reproducible mm-wave components. This paper details two Single Pole 4 Throw (SP4T) switch MMICs covering 24 to 34GHz and 34 to 45GHz. The ...

Future smart systems for communication and RF-sensing will have to achieve autonomous and self-reconfigurable operations, for real-time and efficient selfoptimization of their performance. The needs for such reconfigurable systems are not only to overcome the design tradeoffs that current analogue components must endure, but also to realize new and more efficient systems with improved functiona...

Millimeter-waves integrated circuits offer a unique opportunity for a holistic design approach encompassing RF, analog, and digital, as well as radiation and electromagnetics. The ability to deal with the complete system covering a broad range from the digital circuitry to on-chip antennas and everything in between offers unparalleled opportunities for completely new architectures and topologie...