Channel models for ultrawideband personal area networks

Abstract

This article describes the modeling of ultra-wideband wireless propagation channels, especailly for the simulation of personal area networks. The IEEE 802.15.3a standards task group has established a standard channel model to be used for the evaluation of PAN physical layer proposals. We discuss the standard model, the measurements that form its basis, and the possibilities for future improvements. The article points out the important differences between UWB channels and narrowband wireless channels, especially with respect to fading statistics and time of arrival of multipath components. The impacts of the different propagation conditions on system design, like Rake receiver performance, are elaborated. IEEE Wireless CommunicationsThis work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved.

High-speed ultra-wide band in-car wireless channel measurements

“…UWB benefits from relative immunity to multipath fading and is capable of resolving multipath components with differential delays of 133ps [10] which implies that the existing multipath within this application can be resolved.…”

“…Ultra WideBand (UWB) technology has gained huge interest globally due to its potential to deliver high data rate and spatial capacity, with multipath immunity [1,2] and low power, low cost design. The deployment of this wireless technology in vehicles will provide mobility and connectivity to a host of passenger devices while reducing significantly the costs associated with wiring.…”

Multiple Antenna Time Reversal Transmission in Ultra-Wideband Communications

“…Despite the significant differences between UWB and narrowband behaviors, existing work has shown that a tapped-delay-line model is appropriate to describe the UWB channels [10], [11]. The channel response can be written as…”

“…Practical values of L depend on the root-mean-squared delay spread of the channel, multipath resolution, and the range of attenuation from the statistically strongest path to the weakest path. Early experimental measurement indicated that the average number of resolvable path is about L = 40 with a 10 dB range (see, e.g., [11]). A RAKE receiver is commonly used to collect these paths coherently to increase the signal strength.…”

Performance analysis of multiband OFDM for UWB communication

“…1 The objective of this paper is to study the suitability and to analyze the (potential) performance of Multiband OFDM for UWB transmission. Thereby, our investigations rely on the new UWB channel model developed under IEEE 802.15 [7]. We analyze this channel model in the frequency domain and 1 Throughout this paper, the term "Multiband OFDM" refers to the particular standard proposal [4], whereas "BICM-OFDM" referes to the general concept of combining BICM and OFDM. extract the relevant statistical parameters that mainly determine the performance of OFDM based transmission.…”