Ultra Wideband: Applications, Technology and Future perspectives (original) (raw)

Ultra-wideband wireless communications

Wireless Communications and Mobile Computing, 2003

Ultra-wideband (UWB) communication techniques have attracted a great interest in both academia and industry in the past few years for applications in short-range wireless mobile systems. This is due to the potential advantages of UWB transmissions such as low power, high rate, immunity to multipath propagation, less complex transceiver hardware, and low interference. However, tremendous R&D efforts are required to face various technical challenges in developing UWB wireless systems, including UWB channel characterization, transceiver design, coexistence and interworking with other narrowband wireless systems, design of the link and network layers to benefit from UWB transmission characteristics. This paper is to provide an overview of UWB communications, summarize the previous research results, and identify further research issues that need to be tackled. The emphasis is placed on the commercial wireless communications. Copyright © 2003 John Wiley & Sons, Ltd.

Ultra-wideband radio technology: potential and challenges ahead

IEEE Communications Magazine, 2003

An unprecedented transformation in the design, deployment, and application of short-range wireless devices and services is in progress today. This trend is in line with the imminent transition from third- to fourth-generation radio systems, where heterogeneous environments are expected to prevail eventually. A key driver in this transition is the steep growth in both demand and deployment of WLANs/WPANs based on the wireless standards within the IEEE 802 suite. Today, these short-range devices and networks operate mainly standalone in indoor home and office environments or large enclosed public areas, while their integration into the wireless wide-area infrastructure is still nearly nonexistent and far from trivial. This status quo in the short-range wireless application space is about to be disrupted by novel devices and systems based on the emerging UWB radio technology with the potential to provide solutions for many of today's problems in the areas of spectrum management and radio system engineering. The approach employed by UWB radio devices is based on sharing already occupied spectrum resources by means of the overlay principle, rather than looking for still available but possibly unsuitable new bands. This novel radio technology has received legal adoption by the regulatory authorities in the United States, and efforts to achieve this status in Europe and Asia are underway. This article discusses both the application potential and technical challenges presented by UWB radio as an unconventional but promising new wireless technology.

Introduction to Ultra Wideband

Ultra Wideband Wireless Communication, 2005

Wireless communication systems have evolved substantially over the last two decades. The explosive growth of the wireless communication market is expected to continue in the future, as the demand for all types of wireless services is increasing. New generations of wireless mobile radio systems aim to provide flexible data rates (including high, medium, and low data rates) and a wide variety of applications (like video, data, ranging, etc.) to the mobile users while serving as many users as possible. This goal, however, must be achieved under the constraint of the limited available resources like spectrum and power. As more and more devices go wireless, future technologies will face spectral crowding, and coexistence of wireless devices will be a major issue. Therefore, considering the limited bandwidth availability, accommodating the demand for higher capacity and data rates is a challenging task, requiring innovative technologies that can coexist with devices operating at various frequency bands. Ultra wideband (UWB), which is an underlay (or sometimes referred as shared unlicensed) system, coexists with other licensed and unlicensed narrowband systems. The transmitted power of UWB devices is controlled by the regulatory agencies [such as the Federal Communications Commission (FCC) in the United States], so that narrowband systems are affected from UWB signals only at a negligible level. UWB systems, therefore, are allowed to coexist with other technologies only under stringent power constraints. In spite of this, UWB offers attractive solutions for many wireless communication areas, including wireless personal area networks (WPANs), wireless telemetry and telemedecine, and wireless sensors networks. With its wide bandwidth, UWB has a potential to offer a capacity much higher than the current narrowband systems for short-range applications. According to the modern definition, any wireless communication technology that produces signals with a bandwidth wider than 500 MHz or a fractional

Study on Ultra-Wideband (UWB) System and Its Applications

Journal Of The Bangladesh Electronics Society, 2018

Ultra-Wideband (UWB) system is a prominent wireless technology which provides a very different approach compared to traditional narrowband systems. It is considered a promising solution for high data-rate and short-range wireless communication system to meet an ever-growing demand for high speed. This technology is developed to transfer data at high rates over short distances at a very low frequency. Before 2001 UWB's application was limited mainly in military areas and gradually Federal Communications Commission (FCC) has allowed the commercial usage of the bandwidths of UWB. FCC regulates the frequency for the UWB technique is from 3.1ghz to 10.6ghz and the linear band is 500 mhz. In this paper, we've mainly focused on its applications in different arenas. This paper also represents its technological challenges, the advantages, and drawbacks as well as future work scopes.

Ultra-wideband communications - An idea whose time has come

IEEE Signal Processing Magazine, 2004

ltra-wideband (UWB) radio is a fast emerging technology with uniquely attractive features inviting major advances in wireless communications, networking, radar, imaging, and positioning systems. By its rulemaking proposal in 2002, the Federal Communications Commission (FCC) in the United States essentially unleashed huge "new bandwidth'' (3.6-10.1 GHz) at the noise floor, where UWB radios overlaying coexistent RF systems can operate using low-power ultra-short information bearing pulses. With similar regulatory processes currently under way in many countries worldwide, industry, government agencies, and academic institutions responded to this FCC ruling with rapidly growing research efforts targeting a host of exciting UWB applications: short-range very high-speed broadband access to the Internet, covert communication links, localization at centimeter-level accuracy, high-resolution ground-penetrating radar, through-wall imaging, precision navigation and asset tracking, just to name a few. This tutorial focuses on UWB wireless communications at the physical layer. It overviews the state-of-the-art in channel modeling, transmitters, and receivers of UWB radios, and outlines research directions and challenges to be overcome. As signal processing expertise is expected to have major impact in research and development of UWB systems, emphasis is placed on DSP aspects.

Ultra wide band wireless communications: A tutorial

Journal of Communications and Networks, 2003

Ultra wide band (UWB) radio has recently attracted increased attention due to its expected unlicensed operation, and potential to provide very high data rates at relatively short ranges. In this article we briefly describe some main candidate multiple access and modulation schemes for UWB communications, followed with their power spectral density calculation and properties. We also present some illustrative capacity results, and provide a discussion of the impact of network topology on multiple access capacity.

Ultra-Wideband Communication Systems: Technology and Applications

EURASIP Journal on Wireless Communications and Networking, 2006

Ultra-wideband (UWB) signals are defined to have a bandwidth of at least 500 MHz and/or a relative bandwidth of more than 20%. A signal with such a large bandwidth has some very unique properties like resistance to small-scale fading, good resolution for ranging and geolocation, and resistance to narrow-band interference. These signals can be used for transmission of extremely high-speed data or lowrate data with a large spreading factor. UWB communications have been investigated since the early 1990s, following the pioneering work of Win and Scholtz at USC. A major milestone for UWB deployment was the decision of the frequency regulator in the USA, the FCC (Federal Communications Commission) to allow unlicensed operation of UWB transmission subject to certain restrictions in the emission mask of the power spectral density. In essence, the FCC allowed intentional emissions in the frequency band between 3.1 and 10.6 GHz with a power spectral density of −41.3 dBm/MHz. This value agreed with the already existing regulations for unintentional emissions from electronic devices in that frequency range. Regulations in other countries were much slower in the making. Japan allowed UWB transmissions in the 3.1-4.8 and 6-10 GHz bands only in late 2006. A key requirement of the Japanese regulations is that, for frequencies between 3.1-4.8 GHz, UWB transmitters must employ "detect and avoid." In other words, it is the duty of a UWB transmitter to detect a possible victim device and cease transmissions that might disturb such a device. Until 2010, the band between 4.1 and 4.8 GHz is exempt from this DAA requirement. European regulations are scheduled to be issued in the next years and are anticipated to be similar to the Japanese regulations.

Ultrawideband Communications—An Idea Whose Time has Still Yet to Come? [Wireless Corner]

IEEE Antennas and Propagation Magazine, 2015

This paper presents a critical analysis of ultrawideband (UWB) and considers the turbulent journey it has had from the Federal Communications Commission's bandwidth allocation in 2002 to today. It analyzes the standards, the standoffs, and the stalemate in standardization activities and investigates the past and present research and commercial activities in realizing the UWB dream. In this paper, statistical evidence is presented to depict UWB's changing fortunes and is utilized as an indicator of future prominence. This paper reviews some of the opinions and remarks from commentators and analyzes predictions that were made. Finally, it presents possible ways forward to reignite the high-data-rate UWB standardization pursuit.

Ultrawideband radio design: the promise of high-speed, short-range wireless connectivity

Proceedings of The IEEE, 2004

This paper provides a tutorial overview of ultrawideband (UWB) radio technology for high-speed wireless connectivity. Subsequent to establishing a historical and technological context, it describes the new impetus for UWB systems development and standardization resulting from the FCC's recent decision to permit unlicensed operation in the [3.1,10.6] GHz band subject to modified Part 15 rules and indicates the potential new applications that may result. Thereafter, the paper provides a system architect's perspectives on the various issues and challenges involved in the design of link layer subsystems. Specifically, we outline current developments in UWB system design concepts that are oriented to high-speed applications and describe some of the design tradeoffs involved.

The evolution of ultra wide band radio for wireless personal area networks

…, 2003

U ltra wideband (UWB) wireless networks are in their infancy, but are poised to become a valuable component of consumer electronics and computer equipment. The IEEE 802.15.3a task group is currently developing a UWB standard that involves most of the major chip manufacturers, including Texas Instruments, Intel, Motorola, and Xtreme Spectrum. This article provides a snapshot of the current state of the UWB standards process. According to the present timetable, drafts are now being completed and the standards should be determined by 2004. We also discuss the benefits of UWB radio, the regulatory environment of UWB, and the design issues that WPAN standards makers must consider.