A technique in improving the distance measurement of an indoor Stepped-Frequency Continuous Wave (SFCW) radar is proposed and presented in this work. The main objective of this SFCW radar is to enable a non-invasive way in measuring the location of patients in a home environment without the need for a worn geo-locating tag. The theoretical and practical operation principle of the radar setup is first explained. Due to its operation in an indoor environment using a two-antenna setup, reflections, multipath, backscattering and cross-coupling are expected to affect its localization estimation. Thus a compensation technique based on Inverse Fast Fourier Transform (IFFT) is used to overcome this limitation. Practical measurements conducted in a 5 x 5 m2 room have successfully proven that the approach is able to compensate for practical multipath from walls, furniture and metallic shelves, yielding a distinct improved measurement technique in localizing a person in a real indoor environment.
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机译：提出并提出了一种改进室内步进频率连续波（SFCW）雷达的测距技术。这种SFCW雷达的主要目的是实现一种无创方式来测量家庭环境中患者的位置，而无需使用磨损的地理位置标签。首先解释了雷达装置的理论和实际操作原理。由于其在室内环境中使用两个天线的设置运行，因此反射，多径，反向散射和交叉耦合预计会影响其定位估计。因此，使用基于快速傅里叶逆变换（IFFT）的补偿技术来克服此限制。在5 x 5平方米的房间中进行的实际测量已成功证明，该方法能够补偿墙壁，家具和金属架子上的实际多径现象，从而在真正的室内环境中定位人时产生了明显的改进测量技术。
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