and Thesis Overview Abstract The Ultra Wide Band (UWB) technology represents a promising approach allowing the development of new types of wireless Local Area Networks (LANs) and Wireless Sensor Networks (WSNs). For twenty years, UWB has been an active field of research and it could be the physical layer for future multiple access wireless networks with very high bit rates, as well as low bit r...

The effect of UWB interference on the DCS-1800 and GSM-900 downlink is studied for different UWB power density. For high UWB power density (-70 dBm/MHz), the effect of UWB signals is very high when the distance between UWB transmitter and DCS-1800 receiver is less than 1 m. For low UWB power density (-100 dBm/MHz), the effect of the UWB signals is quasi null even if the distance between the UWB...

A compact microstrip-fed antenna with dual notched bands is proposed. First, a simple basic configuration is presented for Ultra Wide Band (UWB) applications and then the dual band notched structure is extended from the UWB one. The basic structure of the UWB antenna consists of a simple square radiating patch and a ground plane with a wide square slot on back of the substrate. A semi-circle sh...

Triggered by the release in Feb., 2002 by the Federal Communications Commission of their first authorization for UWB[1], UWB research has been making fast progress across the world. The applications of UWB technology range from multimedia communications, through radar and biomedical image reconstruction, to positioning. Most of the system development for these applications requires the numerica...

Recent advances in wideband impulse technology, low power communication along with unlicensed band have enabled ultra wide band (UWB) as a leading technology for future wireless applications. This paper outlines the applications of emerging UWB technology in a private and commercial sector. We further talk about UWB technology for a wireless body area network (WBAN).

Cancer is the main killing disease and breast cancer is the most common tumor among women. Compared to other cancers, the survival rate in case of breast cancer is high when detected early. Therefore intense screening programs are initiated. The standard for detection of breast cancer is mammography, which has several disadvantages such as ionizing radiation, high false-positive and false-negat...

Non-coherent receivers have become promising candidates for low complexity and low power ultra wide band (UWB) systems.Wediscuss the performance of energy detection and differential detection in additive white Gaussian noise, Rayleigh fading, and multipath environments. It is shown that non-coherent receivers can easily collect the multipath energy by means of equal gain combing. The loss (comp...

Power controlled RRC (Radio Resource Control) is becoming the most attractive paradigm to provide efficient and flexible access for future wireless communications, both in public cellular systems and in local area ones. We aim at investigating how the design of an interferencecontrolled RRC protocol leads to an efficient support of traffic requiring Quality of Service (QoS). This work has been ...

Over the past few years Ultra Wide Band (UWB) technology has taken the realms of communications circuit design to new levels. This paper demonstrates the design and simulation of a very high speed Flash Analog to Digital Converter (ADC) for UWB applications. The ADC was implemented in 90 nanometre (nm) CMOS design process. The converter works at an optimal sampling rate of 4.1 Gig-Samples per s...