存在强窄带干扰时基于IEEE 802.15.6协议的IR-UWB系统TOA估计  

TOA estimation based on IEEE 802.15.6 protocol for IR-UWB system with the presence of strong narrowband interference

作　　者：罗雪涛 王雪[1] 金彦亮[1] Luo Xuetao;Wang Xue;Jin Yanliang(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网重点实验室

出　　处：《电子测量技术》2019年第17期124-129,共6页Electronic Measurement Technology

摘　　要：脉冲超宽带(IR-UWB)技术具有发射功率低、抗多径干扰能力强、穿透力强等特点,由于其良好的时间分辨率,非常适合应用于室内定位。针对传统能量检测算法在强窄带干扰存在时到达时间(TOA)估计精度不高的问题,采用了一种结合平方律器件和带通滤波器的非线性处理技术来消除窄带干扰对TOA估计的影响,之后根据IEEE802.15.6协议分析处理后信号并进行二次估计得到TOA估计结果。仿真结果表明,强窄带干扰存在时,采用了非线性处理技术的能量检测方法比传统的能量检测方法具有更高的TOA估计精度。Impulse radio ultra-wideband(IR-UWB)technology has the characteristics of low transmitting power,strong anti-multipath interference and strong penetration.Because of its good time resolution,it is very suitable for indoor localization.Focused on the issue of the low accuracy of TOA estimation based on traditional energy detection methods with the presence of narrowband interference,a non-linear processing technique combining square-law device and band-pass filter is used to eliminate the influence of narrowband interference on TOA estimation in this paper.Then the received signal after processing is analyzed according to IEEE 802.15.6protocol and the TOA estimation result is obtained by secondary estimation.The simulation results show that the ED method based on non-linear processing technology has higher TOA estimation accuracy than the traditional ED method in the presence of strong narrowband interference.

关 键 词：脉冲超宽带 定位 到达时间估计 窄带干扰 能量检测 

分 类 号：TN[电子电信]