نتایج جستجو برای: wideband uwb radio is a promising technology for low

تعداد نتایج: 16644063  

2011
ZHUO ZOU

This dissertation investigates Ultra-Wideband (UWB) techniques for the next generation Radio Frequency Identification (RFID) towards the Internetof-Things (IoT). In particular, an ultra-high frequency (UHF) wireless-powered UWB radio (UHF/UWB hybrid) with asymmetric links is explored from system architecture to circuit implementation. Context-aware, location-aware, and energy-aware computing fo...

Journal: :international journal of electrical and electronics engineering 0
reza gholami shariatee st. p.o. box 47135-484, babol, iran bijan zakeri shariati st babol hossein mehrpour bernety

this paper presents a low-cost compact planar microstrip-fed monopole antenna and its four-element array design for ultra-wideband (uwb) wireless communication and target detection applications, respectively, operating in the frequency span of 3 ghz to 11 ghz. a prototype was fabricated and then measured based on optimal parameters. the results of reflection coefficient (s11) and radiation patt...

2007
Geir Egil Øien Senad Canovic

Problem Description The thesis consists of: 1-Study and understating of the UWB technology 2-Study and understanding of methods and principals for/behind positioning using the UWB technology. 3-Identification of a few suitable methods for practical implementation of such functionality. 4-Comparison of these methods and recommendation of one of them as the most suitable implementation method. Su...

2008
Mohammad Upal Mahfuz Kazi M. Ahmed Nandana Rajatheva

This paper demonstrates optimum receiver performance in terms of bit error rate (BER) for time hopping pulse position modulation (TH-PPM) ultra wideband (UWB) system in multiple user interference environment for indoor radio communication. Equal gain combining and selective gain combining have been demonstrated in terms of ideal RAKE (ARAKE), selective RAKE (SRAKE) and partial RAKE (PRAKE) rece...

Journal: :Signal Processing 2014
Yiyin Wang Geert Leus Hakan Deliç

In this paper, we propose a time-of-arrival (TOA) estimation scheme using impulse-radio ultra-wideband (IR-UWB). This scheme is featured by a low sampling rate and is robust against clock drift. Low-rate stroboscopic sampling, which can achieve an equivalent sampling rate as high as the Nyquist sampling rate, is adopted to achieve a high resolution TOA estimate by IR-UWB. Since a long preamble ...

Journal: :IEEE Journal on Selected Areas in Communications 2002
Lie-Liang Yang Lajos Hanzo

Ultra-wideband (UWB) systems having a bandwidth on the order of gigahertz have recently received wide attention both in the U.S. and in Europe. The family of UWB systems may communicate either by generating ultra-wideband signals or with the aid of innovatively combining conventional narrowband, wideband, or broadband signals. At the time of writing, UWB systems have only been implemented using...

2003
Liuqing Yang Zhi Tian Georgios B. Giannakis

Low-complexity rapid timing acquisition constitutes a major challenge in realizing the high potential that ultra-wideband (UWB) wireless technology promises for indoor communications. We derive and test two such timing acquisition algorithms which capitalize on the cyclostationarity that is naturally present in UWB transmissions. Our novel schemes are blind, they do not require multiple antenna...

This paper presents a new variable gain low noise amplifier (VG-LNA) for ultra-wideband (UWB) applications. The proposed VG-LNA uses a common-source (CS) with a shunt-shunt active feedback as an input stage to realize input matching and partial noise cancelling. An output stage consists of a gain-boosted CS cascode and a gain control circuit that moves the high resonant frequency to higher freq...

2012
Javad Ahmadi-Shokouh Robert Caiming Qiu

The most recent increase in demand within the wireless user community for short-range, very high rate data and video transmission devices has motivated the growth of a new generation of broadband wireless access communication systems, i.e. Ultra-Wideband (UWB) radio (1)-(4). UWB technology has been employed for several decades in military and commercial communications applications like high-spe...

Journal: :Engineering Applications of Artificial Intelligence 2021

Ultra-wideband (UWB) is the state-of-the-art and most popular technology for wireless localization. Nevertheless, precise ranging localization in non-line-of-sight (NLoS) conditions still an open research topic. Indeed, multipath effects, reflections, refractions, complexity of indoor radio environment can easily introduce a positive bias measurement, resulting highly inaccurate unsatisfactory ...

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