Wireless communication technology has given us convenient ways to transfer information from one point to other anywhere in the world. The recent popularity of wireless networks results in many additional requirements of the system, especially the need of high data rates, demand for high quality multimedia services and the requirement of the greater bandwidth. The Ultra Wideband (UWB) radio comm...

Ultra-Wideband (UWB) was approved by the Federal Communications Commission (FCC) in Mar. 2002 for unlicensed operation in the 3.1-10.6 GHz band subject to modified Part 15 rules. The rule limits the emitted power spectral density (p.s.d) from a UWB source measured in a 1 MHz bandwidth at the output of an isotropic transmit antenna at a reference distance to that shown in Figure 1. Further, the ...

This paper deals with channel estimation, and detection in ultra wide band (UWB) bi-phase impulse modulated systems. We address the single user and the multiuser scenario assuming a direct sequence spreading code division multiple access (DS-CDMA) scheme. The channel estimation and detection approach is single user based, and operates in the frequency domain. In the presence of multiple access ...

Ultra Wide Band (UWB) wireless communications offers a radically different approach to wireless communication compared to conventional narrow band systems. Global interest in the technology is huge. This paper reports on the state of the art of UWB wireless technology and highlights key application areas, technological challenges, higher layer protocol issues, spectrum operating zones and futur...

This study describes the bending effect on an Ultra Wideband (UWB) microstrip patch antenna on the antenna performance in terms of impedance bandwidth and radiation pattern. Comparison is done between the UWB planar antenna and the bent UWB antenna. The bending effect causes shift in resonant frequencies with slight change in the impedance bandwidth. A circuit model comprising lumped elements i...

This paper present the design and performance of a microstrip fed circular patch antenna with defected ground plane. The overall size of antenna is 35mm × 30 mm × 1.59 mm. The proposed antenna is simulated by applying CST Microwave Studio simulator. This antenna provides broad impedance bandwidth of 2.70GHz (2.30 GHz – 5.01 GHz) with flat gain (close to 3dBi) in the desired frequency range. Thi...

Ultra Wide Band (UWB) communications offers a radically different approach to wireless communication compared to conventional narrow band systems. Global interest in the technology is huge. This white paper reports on the state of the art of UWB wireless technology and highlights key application areas, technological challenges, higher layer protocol issues, spectrum operating zones and future d...