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UWB pulse signal waveform distortion of

Author: LuZuo
Tutor: ZhangQinYu
School: Harbin Institute of Technology
Course: Communication and Information System
Keywords: Ultra-Wideband Frequency -dependent Waveform distortion Reflection Transmission
CLC: TN925
Type: Master's thesis
Year: 2008
Downloads: 29
Quote: 0
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Abstract


With the rapid growth of demand for the amount of information , access to information , there was greater variation from the original exposure to the non -contact type development , various physical quantities such as from a simple data collection , and gradually developed into an electromagnetic signal to achieve the right perception of the surroundings . Because IR-UWB (Impulse Radio Ultra Wideband) delay of the signal narrow , high resolution characteristics, based on the detection of IR-UWB imaging technology has been widely studied , with the transmission advantages can be realized detection, imaging, communications integration. Meanwhile, the detection technology from the original target detection developed to target identification, that is, from the peak detection , target imaging developed to waveform analysis. For IR-UWB signal is broadband spectral characteristics , the waveform must be considered during the analysis resulting waveform distortion. This waveform distortion, will seriously affect the positioning accuracy and the detection performance of communication systems . Purpose of this paper is to study the UWB pulse signal in the reflection and transmission process due to waveform distortion caused by frequency-dependent analysis of electromagnetic characteristics, signal angle , polarization , and the pulse waveform distortion of energy loss , and thus the local signal template , receiver design and channel modeling provides an important reference, the final of the UWB pulse system design and performance analysis provide a theoretical basis . This paper systematically introduces UWB pulse signal propagation mechanism , and in this study based on the pulse waveform distortion causes and manifestations ; discuss the material wideband characteristics of electrical parameters , analyzed and summarized a variety of common materials in the ultra- wideband indoor range electrical parameter value ; frequency-domain methods for UWB pulse signal on a smooth surface and a rough surface reflection carried out theoretical modeling , simulation analysis of UWB pulse signal reflected waveform trends ; while multiple reflections within the dielectric plate model introduces UWB impulse signal transmission mechanism , the correction for the characteristics of the dielectric plate transmission coefficient , to further improve the transmission waveform analysis . Finally, a numerical method of reflection and transmission of the distortion of the waveform described and analyzed quantitatively .

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