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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65866

    Title: 利用穿牆連續波雷達分析人體步態的微都卜勒效應;Analysis of Micro-Doppler Effect of Human Gait by Through-Wall Continuous-Wave Radar
    Authors: 聶啓軒;Nieh,Chi-hsuan
    Contributors: 遙測科技碩士學位學程
    Keywords: 微運動;微都卜勒效應;時頻轉換分析;人體步態模型;穿牆探測;Micro motion;Micro-Doppler effect;Time-frequency analysis;Human gait model;Through wall surveillance
    Date: 2014-07-25
    Issue Date: 2014-10-15 17:16:07 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 近年來,雷達都卜勒效應在軍事及民用方面的作用日益漸增,雷達都卜勒效應分析可以很好地估計目標的運動參數,如:運動方向,運動速度等訊息。而微都卜勒效應是近年來國外學者Victor C. Chen提出的一個較新的理論體系,它是建立在物體微運動模型基礎上發展起來的。
    ;Radar Doppler has various applications in both military and civil aspect. The target moving parameters such as moving direction, moving velocity and so on can be well estimated through the analysis of radar Doppler effects. A new research called micro-Doppler which is proposed by the famous scholar Victor C. Chen was developed on the basis of micro motion model of objects.
    Since the human beings and the other creatures usually walk or run with a constant velocity, stride and gait frequency, there are some micro-Doppler signatures on their spectrums. Human gait detection and characteristic extraction mainly utilize the human’s walking dynamic features to modulate the radar echo phase, use time-frequency analysis method to obtain the spectrum, and extract the micro-Doppler signature of human gait from spectrum.
    Through wall surveillance (TWS) is a kind of detection technology which can penetrate walls and other obstacles. With the ability of through-obstacle detection, TWS has been playing an important role in military reconnaissance, counter-terrorism, hostage rescue, earthquake casualty search and so on.
    In this study, the micro-Doppler effect of the vibration and rotation is firstly discussed which is depend on the specific micro motion, and followed by the tool of time-frequency analysis. A gait echo model is proposed, which represents the rotation angles, displacements and relative phase relationship of joints, scatterers and the instantaneous Radar Cross Section (RCS). Finally, micro Doppler is combined with TWS for the feasibility of human gait direction determination.
    Appears in Collections:[遙測科技碩士學位學程] 博碩士論文

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