摘要
无源被动定位是指确定网络覆盖区域内没有携带任何发射和接收设备目标的空间位置。针对室内定位有效性问题,相比传统基于接收信号强度的方案,物理层的信道状态信息在无源被动定位方面更有优势。通过评估多径效应对室内无源定位的影响,定位方案讨论了信道状态信息相对稳定的物理特性,利用了信道中相应子载波幅度直方图性质建立的指纹库进行无源被动定位。通过两种不同室内环境下的实验结果表明,该方法在人体定位时相对接收端的8个方向上得出的误报率约为13%,漏报率约为7%;在有效检测半径1 m的情况下,偏差率为25%,相对误差为0.196 m。
Device-free Passive localization is a system envisioned to detect, track and identify entities that do not carry any device ,nor participate actively in the localization process. Compare to traditional solutions based on the received signal strength ,channel state information（CSI） has more advantage. On observing the stable characteristics of CSI while retaining sensitivity to nearby human locomotion, the method proposed to leverage the histogram feature of the subcarrier amplitudes as signatures for omnidirectional passive human detection. It also considered the mul- tipath affection of indoor environment and utilized the fingerprint system to improve performance. Experimental re- sults show that the localization method is reliable with an average false positive of 13% and false negative of 7% in detecting human position in 8 directions. In the case of effective detection radius of 1 m,the deviation is 25% and the relative error is 0.196 m.
出处
《传感技术学报》
CAS
CSCD
北大核心
2015年第5期677-683,共7页
Chinese Journal of Sensors and Actuators
基金
浙江省自然科学基金项目(LY13F010011
LQ13F050005
LY14F050004)
