基于速度差补偿的双频连续波雷达室内人体定位方法

发布时间：2018-01-17 16:34

本文关键词：基于速度差补偿的双频连续波雷达室内人体定位方法　出处：《电子与信息学报》2017年06期 　论文类型：期刊论文

【摘要】：目前,用于室内定位的雷达技术为了达到高精度而使用高带宽的调频连续波,这样不仅对设备要求高且杂波干扰大。为降低带宽开销,该文使用双频连续波比相测距机制来实现室内人体定位。在该方法中复杂的室内环境和人体变化的移动速度会造成频谱扩展,导致有效信号信噪比降低,能量发散甚至出现峰值误判,直接降低测速和定位的精度。由此,提出应用于室内环境中的基于双频连续波比相测距的局部速度差补偿算法,以校准频域信号,获取高精度的速度与距离信息。实验结果表明在设备功率提供的测距范围内固定位置均方根误差在9~14 cm内,与已有调频连续波有同等级的测距精度,最终实现了低带宽下的高精度人体定位。同时该系统的算法复杂度较低,能更好地适用于人体轨迹的实时跟踪。
[Abstract]:At present, radar technology for indoor positioning uses high bandwidth FM continuous wave in order to achieve high accuracy, which not only requires high equipment and clutter interference, but also reduces bandwidth overhead. In this paper, the dual-frequency continuous wave phase ratio ranging mechanism is used to realize indoor human body localization. In this method, the complex indoor environment and the moving speed of human body will cause spectrum spread and reduce the SNR of the effective signal. Energy divergence and even peak value misjudgment directly reduce the accuracy of velocity measurement and positioning. Therefore a local velocity difference compensation algorithm based on dual-frequency continuous wave phase ratio ranging is proposed to calibrate the frequency domain signal in indoor environment. The experimental results show that the root-mean-square error of fixed position in the range provided by the power of the equipment is within 9 ~ 14 cm, and has the same accuracy as the existing FM continuous wave. The algorithm complexity of the system is lower and the system is more suitable for real-time tracking of human trajectory.
【作者单位】：武汉理工大学信息工程学院;长沙学院数学与计算机科学系;
【基金】：国家自然科学基金(61373042,61502361)~~
【分类号】：TN958.94
【正文快照】： 1引言随着无线信号的发展,基于位置的服务(LBS)得到广泛的应用,移动定位作为主要技术受到了广泛的关注。关于定位的感知技术层出不穷,主要包括:射频识别技术,蓝牙技术,超声波定位感知,WIFI等[1]。其中通过建立室内传播模型,利用接收信号强度的指示(RSSI)实现物体的距离检测的

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