Abstract
Emerging indoor technologies including wireless multimedia and personal area networks (WPANs) entail high-rate systems capable of supporting multiple users (piconets) with variable rates. These requirements motivate the design of multiband (MB) ultra-wideband (UWB) radios for their simplicity in handling pronounced frequency selectivity, agility in coping with interference, scalability in providing multirate operation, and their potentially low cost. Relative to baseband UWB radios, MB-UWB systems have gained popularity in the IEEE standards for short-range wireless links. However, multiple-access (MA) schemes must be designed carefully to harness the diversity benefits provided by the MB-UWB propagation, in a spectrally efficient manner. To this end, we introduce a crossband flexible UWB MA scheme for multipiconet WPANs. The resultant design that we term FLEX-UWB offers resilience to multiuser interference, can conveniently accommodate various spreading alternatives, enables full multipath diversity, and can effect scalable spectral efficiency (from low to medium and high data rates). Simulations confirm the merits of FLEX-UWB radios in comparison with various alternatives.
Original language | English (US) |
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Pages (from-to) | 2023-2032 |
Number of pages | 10 |
Journal | IEEE Transactions on Communications |
Volume | 54 |
Issue number | 11 |
DOIs | |
State | Published - Nov 2006 |
Externally published | Yes |
Bibliographical note
Funding Information:Paper approved by M. Zorzi, the Editor for Multiple Access of the IEEE Communications Society. Manuscript received April 25, 2005; revised December 31, 2005 and March 23, 2006. This work was prepared through collaborative participation in the Communications and Networks Consortium sponsored by the U. S. Army Research Laboratory under the Collaborative Technology Alliance Program, Cooperative Agreement DAAD19-01-2-0011. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation thereon. This work was also supported in part by the National Science Foundation under Grants EIA-0324864 and CNS-0420836. This paper was presented in part at the Asilomar Conference on Signals, Systems, and Computers, Monterey, CA, November 2004 L. Yang is with the Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611 USA (e-mail: [email protected]).
Keywords
- Multiband (MB)
- Multicarrier (MC)
- Multiple access (MA)
- Ultra-wideband (UWB)
- Wireless personal area networks (WPANs)