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IR-UWB测距中NLOS状态的鉴别 被引量:6
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作者 吴绍华 张钦宇 张乃通 《电子与信息学报》 EI CSCD 北大核心 2008年第11期2541-2546,共6页
NLOS效应是IR-UWB测距定位系统中影响精度的主要因素之一。该文提出不依赖于信道估计,直接从接收信号采样序列中提取特征参量进行NLOS鉴别的方法,构造了采样序列的首均比与峰均比乘积作为鉴别参量,并与使用峭度和平均附加时延这两个参... NLOS效应是IR-UWB测距定位系统中影响精度的主要因素之一。该文提出不依赖于信道估计,直接从接收信号采样序列中提取特征参量进行NLOS鉴别的方法,构造了采样序列的首均比与峰均比乘积作为鉴别参量,并与使用峭度和平均附加时延这两个参量的鉴别性能进行了对比。仿真结果表明:相干测距所对应的鉴别性能要好于非相干测距,原因是更为精确的DP检测结果及高采样速率使得参量提取值更能准确地反映信道状态信息;使用峭度和平均附加时延作为鉴别参量所能获得鉴别性能均不理想,而使用采样序列的首均比与峰均比乘积能使鉴别成功率提高10%左右。在定位模块中融入该文所获得的NLOS的鉴别结果将有助于定位精度的进一步提升。 展开更多
关键词 IR-UWB 测距 定位 nlos鉴别
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A Mobile Localization Strategy for Wireless Sensor Network in NLOS Conditions 被引量:7
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作者 Long Cheng Yan Wang +2 位作者 Xingming Sun Nan Hu Jian Zhang 《China Communications》 SCIE CSCD 2016年第10期69-78,共10页
The problem of mobile localization for wireless sensor network has attracted considerable attention in recent years. The localization accuracy will drastically grade in non-line of sight(NLOS) conditions. In this pape... The problem of mobile localization for wireless sensor network has attracted considerable attention in recent years. The localization accuracy will drastically grade in non-line of sight(NLOS) conditions. In this paper, we propose a mobile localization strategy based on Kalman filter. The key technologies for the proposed method are the NLOS identification and mitigation. The proposed method does not need the prior knowledge of the NLOS error and it is independent of the physical measurement ways. Simulation results show that the proposed method owns the higher localization accuracy when compared with other methods. 展开更多
关键词 wireless sensor network LOCALIZATION non-line of sight identification MITIGATION
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