نتایج جستجو برای: ultra wideband
تعداد نتایج: 64872 فیلتر نتایج به سال:
In the last 20 years, a lot of research activity has been carried out on UWB radar in medicine. Over the years, many implementations of medical UWB radars have been presented in literature. An interesting medical application for these devices is the wireless monitoring of vital signs. Heart and breath rate were successfully detected with such devices but in spite of the many working examples pr...
We formalize a model for a self-organizing network of nodes that operate according to the UWB principle based on hybrid modelling formalism. We design the rules that lead to the formation of the network and in particular an admission control procedure that is capable to handle both continuous and discrete perturbations, while maintaining the network in a condition of stability. Cognition is int...
Radio communications using ultra wideband (UWB) frequency have rapidly developed since the beginning of the year 2000. This technique offers advantages that made it attractive to a large number of civilian and military applications. The aim of this work is the study of the geometry features of a UWB antenna and the improvement of the bandwidth by inserting slots. To obtain a very large bandwidt...
2011 International Workshop on ADC Modelling, Testing and Data Converter Analysis and Design and IEEE 2011 ADC Forum June 30 July 1, 2011. Orvieto, Italy. microcontroller THRESHOLD Energy Detector
In this paper we present near-infrared K−band imaging of a sample of ultra-steep spectrum (USS) radio sources selected at 74 MHz. The dual selection criteria of low frequency and USS means that we should be sensitive to the highest redshift (z > 5) radio galaxies. We have obtained K−band magnitudes for all of the objects in our sample of 26 and discuss the properties of each. There is a pronoun...
This paper presents results from double directional channel measurements in a typical home environment with ultra wideband signal. 100 ray paths were extracted using the SAGE algorithm at the both sides of radio link and they are regarded as dominant propagation phenomena. Then the paths were identified to the real environment, in which clusterization analyses were examined. For the residual co...
In this article, a printed ultra-wideband (UWB) monopole antenna with dual band-notched characteristics of size 26mm×35mm is presented. The prototype consists of pincers-shaped radiation element and corner rounded ground plane. By inserting a pair of flexuous slots on the radiation element and a C-shaped slot on the ground plane, the 3.5/5.5 GHz dual band-notched characteristics are achieved, r...
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