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
Performance Improvement of Cooperative MB-OFDM System Based Coming Home Network
Jee-Hoon Kim,Hyoung-Kyu Song +1 more
TL;DR: Simulation results show that cooperative system based on the proposed alternative use of hierarchical modulation and a suitable cooperative space-time block code (C-STBC) outperforms noncooperative one when relatively reliable source-to-relay link (S-R link) is guaranteed.
Journal ArticleDOI
UWB Pulse Generation and Distribution Using a NOLM Based Optical Switch
TL;DR: In this paper, an approach to generate ultra wideband (UWB) pulses based on cross-phase modulation (XPM) effects in nonlinear optical loop mirror (NOLM) is proposed, which is considered as an optical switch which is controlled by pump to generate positive and negative Gaussian pulses, which are then delayed by SMF and combined to generate both Gaussian monocycle and doublet pulses.
Journal ArticleDOI
Theory and analysis of adaptive cylindrical array antenna for ultrawideband wireless communications
TL;DR: Beamforming based on UWBI signals provides a tradeoff between array dimensions, frequency bandwidth, and steering angle for achieving a high angular resolution capability in the azimuth plane as well as in the elevation plane.
Journal ArticleDOI
Design of a new optical impulse radio system for ultra-wideband wireless communications
Wen-Piao Lin,Yuan-Ching Chen +1 more
TL;DR: Experimental and analytical results demonstrate that the proposed system can generate high-quality Gaussian pulse trains for applying future high-bit-rate UWB wireless communications.
Journal ArticleDOI
A microstrip three-port and four-channel multiplexer for WLAN and UWB coexistence
Ming-Iu Lai,Shyh-Kang Jeng +1 more
TL;DR: In this paper, the authors proposed a microstrip three-port four-channel multiplexer for wireless systems where wireless local area network (WLAN) and ultra wideband (UWB) coexist.
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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