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ultrawideband (uwb)
(498 results)-
White Papers
A Polarity Comparison Timing Synchronization Estimation for MB-OFDM Based UWB Systems
May 14, 2012 12:00am PDT
The authors propose a new approach for timing synchronization estimation with polarity comparison for Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM)- based UWB systems. They...
Provided by: Springer Science+Business Media
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White Papers
Joint Optimal Spectrum Sensing Time and Power Allocation in Ultra Wideband Cognitive Radio Networks
April 25, 2012 12:00am PDT
Ultra WideBand (UWB) system is overlapped with various wireless systems, such as WLAN, WiMax and UMTS, which limits the use of UWB. Cognitive Radio (CR) enables UWB systems to efficiently use the...
Provided by: IARIA
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White Papers
Timing Acquisition and Demodulation of an UWB System Based on the Differential Scheme
April 2, 2012 12:00am PDT
Blind synchronization constitutes a major challenge in realizing highly efficient Ultra Wide Band (UWB) systems because of the short pulse duration which requires a fast synchronization algorithm...
Provided by: Academy & Industry Research Collaboration Center
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White Papers
Synchronization for IR-UWB System Using a Switching Phase Detector-Based Impulse Phase-Locked Loop
April 1, 2012 12:00am PDT
Conventional synchronization algorithms for impulse radio require high-speed sampling and a precise local clock. Here, a Phase-Locked Loop (PLL) scheme is introduced to acquire and track...
Provided by: ETRI Journal
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White Papers
BER Analysis of CDMA, OFDM & UVW System Using SIMULINK
March 23, 2012 12:00am PDT
CDMA (Code Division Multiple Access), OFDM (Orthogonal Frequency Division Multiplexing) and UWB (Ultra Wide Band) are t h e most developing technologies in modern mobile communication. OFDM is a...
Provided by: NIMS UNIVERSITY
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White Papers
A SIMO One-Bit Time Reversal for UWB Communication Systems
March 20, 2012 12:00am PDT
With the One-bit Time Reversal Ultra WideBand (OTR-UWB) transceiver, the data symbols are encoded using the reversed order of the channel phase. The major factor limiting SISO OTR capacity and...
Provided by: EURASIP
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White Papers
On the Performance of the Time Reversal SM-MIMO-UWB System on Correlated Channels
March 8, 2012 12:00am PST
In this paper, the impact of spatial correlation on the Multi-Input Multi-Output Ultra-Wide Band (MIMO-UWB) system using the Time Reversal (TR) technique is investigated. Thanks to TR, several...
Provided by: Hanoi University of Technology
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White Papers
Ultra-Wideband Outdoor Communication Characteristics With and Without Traffic
March 7, 2012 12:00am PST
The BER performance for Ultra-WideBand (UWB) outdoor communication in LOS and NLOS environments with and without traffic is investigated. The authors obtain the impulse responses of the UWB...
Provided by: EURASIP
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White Papers
Bayesian Filtering for Indoor Localization and Tracking in Wireless Sensor Networks
March 6, 2012 12:00am PST
In this paper, the authors investigate experimentally the suitability of several Bayesian filtering techniques for the problem of tracking a moving device by a set of wireless sensor nodes in...
Provided by: Springer
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White Papers
Discrete Fourier Transform-Based TOA Estimation in UWB Systems
February 11, 2012 12:00am PST
In this paper, the authors propose two time of arrival estimators for ultra wideband signals based on the phase difference between the Discrete Fourier Transforms (DFT) of the transmitted and...
Provided by: Springer
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White Papers
UWB System Based on Energy Detection of Derivatives of the Gaussian Pulse
February 1, 2012 12:00am PST
A new method for energy detection ultra-wideband systems is proposed. The transmitter of this method uses two pulses that are different-order derivatives of the Gaussian pulse to transmit bit 0 or...
Provided by: Springer
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White Papers
Bandwidth Enhancement Techniques Comparison for Ultra Wideband Microstrip Antennas for Wireless Application
January 31, 2012 12:00am PST
Since the release by the Federal Communications Commission (FCC) of a bandwidth of 7.5GHz (from 3.1GHz to 10.6GHz) for Ultra-WideBand (UWB) wireless communications, UWB is rapidly advancing as a...
Provided by: Journal of Theoretical and Applied Information Technology
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White Papers
A New Symbol Timing Synchronization Scheme for Multi Band OFDM Ultra Wideband (MB-OFDM UWB) Systems
January 1, 2012 12:00am PST
A new low complexity correlation based symbol timing synchronization algorithm called (MSTS) is presented for MB-OFDM UWB systems. The proposed algorithm attempts to locate the start of Fast...
Provided by: International Association of Computer Science & Information Technology (IACSIT)
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White Papers
A Compact and UWB Time-Delay Line Inspired by CRLH TL Unit Cell
December 21, 2011 12:00am PST
This paper presents the design of compact and Ultra-WideBand (UWB) time-delay lines inspired by the use of Composite Right/Left-Handed Transmission Line (CRLH TL) unit cell. A conventional CRLH TL...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
A Cost Function for QoS-Aware Routing in Multi-Tier Wireless Multimedia Sensor Networks
December 14, 2011 12:00am PST
The Wireless Multimedia Sensor Networks (WMSNs) are formed by small devices that are able to capture video or audio information and to transmit it over wireless channels. The development of...
Provided by: Université Paris-Est Marne-la-Vallee
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White Papers
A Novel CMOS Low-Noise Amplifier Design for 3.1- to 10.6-GHz Ultra-Wide-Band Wireless Receivers
December 12, 2011 12:00am PST
In 2002, the Federal Communications Commission (FCC) approved the operation of certain types of wireless devices incorporating the Ultra-WideBand (UWB) technology, which transmits information...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Design and Performance Evaluation of Transmitted Reference BPSK UWB Receiver Using SIMULINK
December 7, 2011 12:00am PST
Ultra wideband systems find applications in indoor and high speed applications. Being baseband transmission, it exhibits properties like low power and low cost design. Especially, IR-UWB systems...
Provided by: International Journal of Computer Science and Information Technologies
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White Papers
Indoor Multipath Wireless Channel Experimental Characterization Utilizing Time Domain Techniques
December 1, 2011 12:00am PST
In this paper an experimental characterization of a typical indoor wireless propagation channel is performed. This channel characterization is needed for short range applications (
Provided by: International Journal of Computer Science and Telecommunications
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White Papers
Enhanced FCME Thresholding for Wavelet-Based Cognitive UWB Over Fading Channels
December 1, 2011 12:00am PST
The cognitive Ultra-WideBand (UWB) network detects interfering narrowband systems and adapts its configuration accordingly. An inherently adaptive and flexible candidate for cognitive UWB...
Provided by: ETRI Journal
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White Papers
UWB Communication Characteristics for Different Materials and Shapes of the Stairs
November 1, 2011 12:00am PDT
A comparison of Ultra-WideBand (UWB) communication characteristics for two different shapes of stairs with concrete and iron materials are investigated. The impulse responses of these stairs are...
Provided by: Academy Publisher
