نتایج جستجو برای: uwb

تعداد نتایج: 4839  

2007
Hang Liu Hanho Lee Duk Kyung Kim

This paper investigates the performance of the high speed 2-parallel MB-OFDM ultra-wideband (UWB) receiver. Achieving high speed and low complexity become a challenge of UWB system design. In our solution, a highspeed low-complexity 2-parallel MB-OFDM UWB system with fixed point data type will be described and simulated.

Journal: :CoRR 2009
Sana Ullah Murad Ali Asdaque Hussain Kyung Sup Kwak

Recent advances in wideband impulse technology, low power communication along with unlicensed band have enabled ultra wide band (UWB) as a leading technology for future wireless applications. This paper outlines the applications of emerging UWB technology in a private and commercial sector. We further talk about UWB technology for a wireless body area network (WBAN).

2012
Dayan Adionel Guimarães Geraldo Gil Ramundo Gomes

In this tutorial paper, the basic principles of the ultra wideband impulse radio (IR-UWB) technology are covered. Pulse construction and signaling formats are discussed, along with channel models suited to the IR-UWB system design and assessment. Some reception techniques are also presented, with emphasis on the time reversal. The paper also highlights some applications of the IR-UWB technology.

2008
F. Thiel M. Hein J. Sachs U. Schwarz T. Lindel F. Seifert

corresponding reconstructed mean UWB signals and the mean of the sinusoidal fitted UWB data for B0 = 0T, 1T and 3T. Upper right: result of the t-test for each time step in t = [0,...,1.1s]. Middle and lower right: comparison of phase of the fit and p-values of the t-test on the phase. Fig. 1: Left: positioning of ECG electrodes and UWB antennas. Right: set-up of the combined ECG/UWB measurement...

2011
Joanne Gomes

Use of Ultra-wideband (UWB) for wireless communication in home networking requires cost effective technical solutions with high quality. This paper investigates the performance of simple receiver with zero forcing equalizer in place of rake receiver for hermite based UWB communication. The UWB system with simple receiver is simulated for the application of image transmission over IEEE UWB chann...

2015
MAHESHWARI SNEHA J. DEORE JAGADISH B. JADHAV

The intent of this paper is to compare two designs of RFID antenna which is used for Ultra High frequency (UHF) and Ultra wideband (UWB) applications. Here the comparison of Hybrid design and XETS design is done. In hybrid design the antenna simultaneously operate on both the bands viz.UHF as well as UWB. In XETS design antenna operates only for UWB. Hybrid antenna is planar antenna. There is a...

Journal: :Wireless Sensor Network 2010
Hannu Olkkonen Juuso T. Olkkonen

In this work we propose an orthogonal pulse waveform for wireless ultra wideband (UWB) transmission. The design is based on an ideal low-pass prototype filter having a windowed sinc impulse response. The frequency response of the prototype filter is transferred to the high frequency region using a specific sign modulator. The UWB pulse waveform comprises of the weighted summation of the left si...

2009
Soodeh Amiri

This paper introduce the concept of cognitive UWB radio, a wireless system based on UWB transmission able to self adapt to the characteristics of the surrounding environment. UWB is an promising underlying method for coexistence among different systems. However, the performance may not be as good as expected due to the changing spectrum environment. Thus, cognitive UWB radio is proposed by taki...

2013
Youngpo Lee Seokho Yoon

In this paper, we propose a distance estimation scheme for radar systems using direct sequence ultra wideband (DS-UWB) signals. The proposed distance estimation scheme averages out the noise by accumulating the correlator outputs of the radar, and thus, helps the radar to employ a short-length DS-UWB signal reducing the correlation processing time. Numerical results confirm that the proposed di...

2012
D. THIRIPURASUNDARI D. S. EMMANUEL

An investigation of magnetic current distribution of CPW fed arrow shaped UWB antenna is reported. This enables the precise prediction of working principle of UWB antenna, since the traditional UWB antenna simulations ignore important details. The computation was performed numerically for an arrow shaped antenna at different resonant frequencies at various input current phase changes and was fo...

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