We present an overview of physical and mediumaccess-control (MAC) layer research for communication and localization in ultra-wideband (UWB) sensor networks for industrial applications, and provide a summary of our results obtained under the umbrella of the EU Integrated Project PULSERS. The focus of our work is on fundamental questions about UWB channel modeling, UWB channel capacity, efficient...

This paper proposes some approaches to model Ultra Wideband (UWB) antenna arrays. Based on the array factor, often stipulated as not adapted for the description of the properties of UWB arrays in the literature, an analytical expression of the beampattern is developed. The achieved results are coherent with other formulations and empiric studies proposed in the literature. Furthermore, a time-f...

This paper proposes a synchronization algorithm for time-hopping pulse position modulation ultra wideband (THPPM-UWB) systems to detect the first symbol arrival time. The transmission signals of UWB systems usually use baseband pulses with very short duration. We would present an overview of the principles of UWB impulse signals, and focus on the synchronization technique of symbol arrival time...

A unique feature of ultra wideband (UWB) technology lies in its dual capabilities of communication and ranging. As UWB pulses are very narrow, very strict synchronization requirements are incurred as timing errors induce severe performances degradation. In this work, using second order statistics of the received signals, we present the Ziv-Zakai lower bound (ZZLB) for the time delay estimation ...

In this research, a full wave simulator, IE3D, is used to analyze an ultra-wideband (UWB) antenna, where Taguchi’s method is applied as an external optimizer to drive IE3D and optimize the UWB antenna. The efficiency of this design procedure demonstrates the excellent optimization performance of Taguchi’s method. The desired frequency response of the UWB antenna is successfully achieved with on...

This paper describes the measurement techniques of emissions from UWB devices discussed in ITU-R task group (TG) 1/8 to study the compatibility between ultra-wideband (UWB) devices and radiocommunication services. This paper also provides the background idea behind the measurement methods, as the final output of the discussion, i.e. ITU-R Recommendation, will not contain any citations to the re...

In this paper, a new Ultra Wideband (UWB) channel estimation algorithm, UWB-SAGE (Space Alternating Generalized Expectation Maximization) is proposed. In the algorithm, a novel UWB signal model which is an extention of the conventional wideband signal model is employed in order to estimate the UWB channel with SAGE algorithm. The algorithm divides the measured data into individual ray paths and...

In this paper, we study the achievable rates of practical ultra-wideband (UWB) systems using pulse position modulation (PPM) and transmitted-reference (TR) transceivers. TR obviates the need for complex channel estimation, which is particularly challenging in the context of UWB. Based on an upper bound we derived for the error probability with random coding, we establish that for SNR values of ...

CMOS Integrated Circuit Design for Ultra-Wideband Transmitters and Receivers. (August 2009) Rui Xu, B.S. , Southeast University, China; M.S., Southeast University, China Chair of Advisory Committee: Dr. Cam Nguyen Ultra-wideband technology (UWB) has received tremendous attention since the FCC license release in 2002, which expedited the research and development of UWB technologies on consumer p...

Ultra Wideband (UWB) is a radio technology that can be used at very low energy levels for short-range high-bandwidth communications by using a large portion of the radio spectrum. Ultra Wideband (UWB) systems transmit signals across a much wider frequency than conventional systems and are usually very difficult to detect. The focus of this research is to model the Ultra wideband (UWB) channel f...