摘要
针对无线传感器网络的低成本、低耗能以及准确定位的需求,提出了一种基于多普勒效应的射频干涉旋转定位算法(RRIPS).先利用设置在锚节点上的2个旋转天线发射相同频率的单频信号,产生多普勒效应,再由待测节点通过分析多普勒频率变化规律获得定位所需的距离信息,最终由待定位节点融合锚节点位于不同位置所测得的多组距离信息,从而获得自身的地理位置估计.与基于射频干涉的分布式节点定位方法(DRIPS)相比,RRIPS仅利用待定位节点的常规无线通信设备接收信号,无需与锚节点进行信息交互,算法简单,运算量小,复杂度低,能耗小.仿真实验表明,在信噪比为10dB时,RRIPS比DRIPS在定位精度上提高了1.5m.
A localization method using rotary antennas to generate radio interference（RRIPS） is proposed to meet the requirements of low power consumption and accurate localization in wireless sensor networks（WSN）. The anchor in WSN is equipped with two rotary antennas that emit the same single frequency signal to generate Doppler shift and radio interference. Then, the signal strength indication （RSSI） received by the sensor is utilized to obtain the ranging information for localization. Finally, the sensor gets multiple sets of RSSI with the anchor in different locations to calculate its own position when the anchor moves to different locations. Comparisons with distributed localization method based on radio interference （DRIPS） show that RRIPS is of low complexity and energy consumption and only relies on radio transceivers without extra communication with anchor. Simulation results and comparisons with DRIPS show that RRIPS improves 1.5 m accuracy when SNR is 10 dB.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2011年第4期60-66,共7页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(60772095
60971113)
国家自然科学基金创新研究群体科学基金资助项目(60921003)
教育部博士学科点基金资助项目(200806980020)
国家科技重大专项资助项目(2010ZX03003-002-02)
