Journal ArticleDOI
Ultra-wideband wireless systems
G.R. Aiello,G.D. Rogerson +1 more
TLDR
In this article, two UWB multiband systems, frequency hopping and Spectral Keying, have been described, both of which meet the stringent requirements provided by IEEE 802.15.3a.Abstract:
The recent FCC frequency allocation for UWB has generated a lot of interest in UWB technologies. There is 7,500 MHz of spectrum for unlicensed use. The main limitations are provided by the low-power spectral density and by the fact that the transmit signal must occupy at least 500 MHz at whole times. IEEE 802.15.3a is being developed for high-bit-rate PAN applications, and UWB is the most promising technology to support the stringent requirements: 110, 200, and 480 Mb/s. Two UWB multiband systems, frequency hopping and Spectral Keying, have been described in this article. Both systems meet the stringent requirements provided by IEEE 802.15.read more
Citations
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Journal ArticleDOI
Filter-free ultrawideband generation based on semiconductor optical amplifier nonlinearities
TL;DR: In this paper, a filter-free scheme for ultrawideband (UWB) generation with single semiconductor optical amplifier (SOA) is proposed and demonstrated, where a pair of polarity-reversed optical pulses are generated due to cross gain modulation (XGM) in the pump-probe scheme, whereas the amplified pump pulse becomes sharp at its leading edge such that the power peak is shifted forward.
Proceedings ArticleDOI
Ultra Wideband Wireless Communication on the Base of Noise Technology
TL;DR: In this article, a double spectral processing (DSP) method was proposed for ultra wideband (UWB) data transmission on the base of noise continuous waveforms, and the new method of code spectral modulation for data insertion onto noise continuous carrier was proposed.
Interference management in impulse-radio ultra-wide band networks
TL;DR: A practical PHY-aware MAC protocol is developed that takes into account the specific nature of IR-UWB and that is able to adapt its rate to interference and clearly outperforms traditional designs that use mutual exclusion or power control.
Proceedings ArticleDOI
A pulse shaping method for UWB avoiding the frequency coexistence interference with WLAN
TL;DR: A new method to generate orthogonal UWB shaping pulses is proposed based on the eigenvectors of Hermitian matrix and Gram-Schmidt process, which have no interference to IEEE 802.11a WLAN systems when they coexist with each other, and the desired shaping pulses are given.
Dissertation
Exploiting the wireless channel for communication
de Lacerda Neto,Raul Liberato +1 more
TL;DR: In this article, the authors propose a channel division multiple access (ChDMA) scheme to exploit the caracteristiques of the canaux in order to maximize the entropy of the system.
References
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Proceedings ArticleDOI
Rapid acquisition for ultra-wideband localizers
TL;DR: This work has developed a method of rapid acquisition that allows two nodes to acquire each other in a fraction of the time afforded by other methods, utilizing a beacon/listener technique using Kasami sequences and divide-and-conquer algorithms.
Proceedings ArticleDOI
Recent advances in ultra wideband communications systems
TL;DR: Three recent system developments are described: an ad hoc wireless UWB communications network for tactical voice and high-speed data communications; a long range UWB system for over-the-water and non line-of-sight voice, data and video communications.
Proceedings ArticleDOI
UWB technology for wireless video networking
M. Ho,L. Taylor,G.R. Aiello +2 more
TL;DR: The characteristics and the advantages of ultra-wideband (UWB) radio technology when combined with a decentralized, priority-driven network architecture for wireless video networking in the home are described.
Proceedings ArticleDOI
Multi-user perspectives in UWB communications networks
TL;DR: In this article, the authors provide an overview of multiplexing techniques and suggest ways in which they can be applied to UWB networks and relative advantages and challenges of each technique are identified in order to understand the suitabilitability of each for use in a multi-piconet WPAN system.
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