Ultra wideband (UWB) is a promising new communication scheme for short-range, high data rate applications. Processing UWB signals necessitates impractically high sampling rates for analog-to-digital converters. In this paper, we propose a new approach to address this problem.

This paper presents the results from an ultra wideband (UWB) indoor measurement campaign and describes a 3D beam trace pyramidal method that allows one to characterize the channel over a bandwidth of 850 MHz. The UWB channel characteristics are assessed in terms of mean delay, delay spread and coherence bandwidth.

Ultra-wideband (UWB) radio offers low power consumption, low power spectral density, high immunity against interference, and other benefits, not only for consumer electronics, but also for medical devices. A cochlear implant (CI) is an electronic hearing apparatus, requiring a wireless link through human tissue. In this paper we propose an UWB link for a data rate of 1.2Mbps and a propagation d...

Ultra-wideband (UWB) signals originated from research and development work on high resolution radiofrequency (RF) radar systems in the 1950-60s. The current FCC regulations in the US, define a UWB signal as having an absolute bandwidth which exceeds 500 MHz or fractional bandwidth over 20%. The FCC frequency band assigned to UWB systems extends from 3.1 GHz to 10.6 GHz, i.e. a bandwidth of 7.5 ...

This paper shows the design of a broadband low noise amplifier (LNA) for ultra-wideband (UWB) system on 0.18um CMOS process. The proposed LNA uses resistive shunt feedback technique and an inter-stage inductor as an inductive peaking to realize the flat gain throughout the UWB band. The designed UWB LNA has a noise figure lower than 3.5dB, gain above 20dB in the frequency range 3. 1-10.2GHz. It...

Ultra wide bandwidth (UWB) signals are commonly defined as signals that have a large relative bandwidth (bandwidth divided by the carrier frequency) or a large absolute bandwidth. Typical indoor environments contain multiple walls and obstacles consisting of different materials. The RF ultra wideband (UWB) system is a promising technology for indoor localisation owing to its high bandwidth that...

Abstract Ultra wideband (UWB) communication technology is a that uses very short time scale to transmit information. It has the advantages of high transmission rate, low power consumption, and good privacy. In this paper, basic principle UWB briefly described, several common technologies are emphatically expounded, characteristics each their disadvantages compared. At same time, article focuses...

In this paper a particle swarm optimization (PSO) algorithm is presented to design a compact stepped triangle shape antenna in order to obtain the proper UWB bandwidth as defined by FCC. By changing the various cavity dimensions of the antenna, data to develop PSO program in MATLAB is achieved. The results obtained from the PSO algorithm are applied to the antenna design to fine-tune the bandwi...

In this paper, we present a measurement based characterization of the Ultra Wideband (UWB) channel in a data center environment. We find that although a modified Saleh-Valenzuela model characterizes the UWB channel, some of the model parameters such as delay spread and log normal shadowing are unique to the data center environment.

Antennas that are capable to radiate in the Ultra-wideband (UWB) range is a major area of current research. The UWB range is accompanied through the integration of Multiple-InputMultiple-Output (MIMO). In this paper, two circular monopole antennas are acting as the radiating elements. A T-shape stub is placed between the radiator elements to enhance isolation. The proposed antenna is capable of...