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This correspondence provides an insight into the echo spectrum of stepped-frequency continuous wave (SFCW) from the view point of time domain and presents a new reconstruction filter structure. At the design stage, a zero-order hold system is introduced to analyze the spectrum of conventional SFCW echoes, and the theoretical expressions highlight that the Fourier transform (FT) technology can be applied...
When a human walks, the motion of various components of the body including the head, torso, arms, legs, and feet produce a very characteristic Doppler signature. A new signal model of the walking human, based on the linear frequency modulated (LFM) signal, is proposed. This model contains 12 scatter-points of human, together with kinematic equations of motion of each body part. For each part of human...
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