The paper proposes a new way of considering software radio in the specific context of UWB. Due to the extremely wide-band nature of UWB signals, it is shown that a first stage of analog pre-processing is mandatory to make SDR applicable in this context, in other words to obtain flexible or multi-purpose UWB systems. But not any analog frontend is convenient. It must be generic enough in order t...

A novel two layered UWB antenna is proposed and designed to resonate at the full range of UWB frequencies’ spectrums from 3.1 GHz up to 10.6 GHz, well below -14.0dB reference levels of return loss. The size of the UWB antenna is small, with width of 31.0 mm and length of 25.0 mm, and the two layers of FR4 board thickness are 0.5 mm (top layer) and 1.6 mm (bottom layer).The antenna radiates omni...

Several researches are focused on the QoS (Quality of Service) and Energy consumption in wireless Multimedia Sensor Networks. Those research projects invest in theory and practice in order to extend the spectrum of use of norms, standards and technologies which are emerged in wireless communications. The performance of these technologies is strongly related to domains of use and limitations of ...

In this paper, A Switchable Filtering Antenna Integrated With U-Shaped Resonators for Bluetooth, WLAN & UWB Applications is presented. To achieve the operation, a rectangular defect on ground plane and square slots are etched patch. The selectivity of frequency achieved by integrating Hairpin filter. Three switches connected at corners filter to re-configurability. total eight Boolean combi...

This paper presents the design of compact CPW-fed band notched UWB square ring antenna. The main objective of this proposed research work is to reduce the size of antenna and avoid interference between UWB and WLAN application at 5.5GHz. The antenna consists of a square-ring metal patch and 50Ω coplanar waveguide fed. The structure of the antenna is miniaturized by optimizing its square ring pr...

A planar band pass filter topology is built using broadside coupled structure. The design is aimed at achieving pass band that covers the frequency range from 3.1GHz to 10.6 GHz. as required by modern Ultra Wide Band (UWB) indoor and outdoor communication systems . Multiple unlicensed users could share spectrum previously allocated to the users, including licensed users, on a non-interference b...

Ultra wideband (UWB) is a promising technology for short range and high-speed wireless communications such as home entertainment, wireless video downloading, wireless LAN, wireless USB and so on. This dissertation studied several important issues in the application of UWB technology and its contributions are summarized as follows. First, a 2-stage optimal UWB pulse shaping filter design procedu...

In this paper, we focus on auto-localization of nodes in a static wireless network, under the assumption of known position of a few initial nodes, denoted as “beacons”. Assuming that Ultra Wide Band (UWB) signals are used for inter-node communications, we analyze the impact of the number of beacons on the location accuracy. Three different approaches to localization are considered, namely: the ...

Antenna diversity is an effective solution to mitigate multipath fading signals and enhance the system capacity. Ultra wide band has become one of the most favourable technologies for wireless communications owing to its promising features such as low susceptibility to multipath fading, reduced probability of detection and intercept, and potentially high data rates. The aim of project is to des...