Fluid coding and coexistence in ultra wide band networks |
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Authors: | Daniele Domenicali Guerino Giancola M-G Di Benedetto Maria-Gabriella Di Benedetto |
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Affiliation: | (1) School of Engineering, University of Rome La Sapienza, Infocom Department, Via Eudossiana, 18-00184 Rome, Italy |
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Abstract: | Time Hopping Ultra Wide Band (TH–UWB) commonly encodes the data symbols by shifting the position of the transmitted pulses
by a quantity that is quantized over the inter-pulse interval range. In this paper, we relax the hypothesis of a discrete
value for the time shift introduced by the TH code, by considering the possibility of generating real-valued codes that introduce
time hopping in a “fluid” way. The effect on the power spectral density of generated signals is analyzed, and application
of fluid coding to multiple access and to network coexistence is investigated by simulation.
Portions of this work were presented at the 2005 2nd International Workshop Networking with Ultra Wide Band, Workshop on Ultra
Wide Band for Sensor Networks M.G. Di Benedetto, G. Giancola, D. Domenicali and P. Ingargiola “Fluid Coding in Time Hopping
Ultra Wide Band Networks,” Proceedings of the IEEE 2nd International Workshop Networking with Ultra Wide Band—Ultra Wide Band
for Sensor Networks, July 2005, Rome, Italy].
Daniele Domenicali took his Laurea degree in Telecommunications Engineering at the University of Rome La Sapienza in 2004. In November 2004
Domenicali wins the open competition for PhD scholarship in Information and Communication Engineering. He is teaching assistant
for the course of “UWB Communication Systems” conducted by Professor Maria Gabriella Di Benedetto at the University of Rome
La Sapienza. His research activity includes Pulse Shaping and the related modulation and coding techniques (Time Hopping Coding,
PAM and PPM Modulation). Particular attention is paid to the effects produced in the Power Spectral Density, in order to find
solutions capable of optimizing spectrum occupation while meeting the constraints imposed by emission masks. Daniele Domenicali
is involved in the European Network of Excellence HYCON (Hybrid Control: Taming Heterogeneity and Complexity of Networked
Embedded Systems).
Guerino Giancola received the “Laurea” degree (magna cum laude) in Telecommunications Engineering, and the Ph.D. degree in Information and
Communication Engineering from University of Rome La Sapienza, in 2001 and 2005, respectively. He is currently a research
affiliate at the INFOCOM Department at University of Rome La Sapienza, where is actually holding the course of “Electrical
Communications” for the degree on Electronic Engineering. His research interests include the analysis and modelling of Multi
User Interference in Impulse Radio systems, and the design of Medium Access Control functions and protocols for UWB ad-hoc
networks. Guerino Giancola recently co-authored with Prof. Maria-Gabriella Di Benedetto a book on Ultra Wide Band from radio
to the network, titled “Understanding Ultra Wide Band Radio Fundamentals” and published by Prentice Hall in June 2004. He
is now involved in the European project “PULSERS – Pervasive Ultra wideband Low Spectral Energy Radio Systems” and in the
European Network of Excellence “HYCON- Hybrid Control: Taming Heterogeneity and Complexity of Networked Embedded Systems”.
Guerino Giancola is a member of the IEEE Communication Society.
Maria-Gabriella Di Benedetto obtained her Ph.D. in Telecommunications in 1987 from the University of Rome La Sapienza, Italy. In 1991, she joined the
Faculty of Engineering of University of Rome La Sapienza, where currently she is a Full Professor of Telecommunications at
the Infocom Department. She has held visiting positions at the Massachusetts Institute of Technology, the University of California,
Berkeley, and the University of Paris XI, France. In 1994, she received the Mac Kay Professorship award from the University
of California, Berkeley.
Her research interests include wireless communication systems and speech science. From 1995 to 2000, she directed four European
projects for the design of UMTS. Since 2000, she has been active in fostering the development of Ultra Wide Band (UWB) radio
communications in Europe. Within the 5th framework, she directed for the Infocom Dept. two European projects (whyless.com
and UCAN) aimed at the design and implementation of UWB ad-hoc networks. Currently, within the 6th EU Framework, her “Networking
with UWB” research group participates in the PULSERS Integrated Project which will integrate UWB research and development
in Europe for the next years, and in the LIAISON Integrated Project as regards the application of UWB to location-based services.
She also participates in the HYCON network of excellence. Dr. Di Benedetto is co-edited several Special Issues on UWB communications
and networks for several Journals including IEEE JSAC, Journal of Communications and Networks, Mobile Networks and Applications,
Eurasip.
In 2004, Dr. Di Benedetto co-authored with G. Giancola the first published book on UWB for communications titled “Understanding
Ultra Wide Band Radio Fundamentals” and published by Prentice Hall. She recently completed the co-edition of two new books
on UWB that will be published by 2005: UWB Communication Systems - A comprehensive overview, with T. Kaiser, D. Porcino, A. Molisch, and I. Oppermann, Hindawi Publishing Corporation, 2005, andUltra Wideband Wireless Communications with H. Arslan and Z.N. Chen, John Wiley & Sons, Inc., 2005. |
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Keywords: | Ultra Wide Band Impulse Radio Time Hopping Coding Multi-User UWB Communications |
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