摘要
针对室内定位服务的迫切需求,搭建了利用指纹技术实现对室内蓝牙设备的精确定位系统。该系统以蓝牙设备为平台,通过获取蓝牙无线链路的接收信号强度参数,建立信号样本数据库,对在线阶段采集到的信号利用K阶近邻法实现对设备的定位。该系统在传统指纹定位算法的基础上加入了对在线定位阶段信号的小波去噪过程,用于降低噪声干扰,提高定位精度。在办公室环境下,蓝牙设备的平均定位精度达到了0.2 m。
Aiming to the serious demands of the indoor location service, a precise Bluetooth positioning system with an advanced fingerprinting technology is presented. The system uses Bluetooth devices as the platform, establishes signal sample database by getting the received signal strength of Bluetooth wireless link parameters, uses the K-order neighbor method to realize the positioning of the equipments at online positioning stage. We add a wavelet de-noising process into the traditional fingerprint positioning technology at online stage to reduce noise and improve positioning accuracy. For a typical office scene, the average positioning accuracy of Bluetooth devices reaches 0.2m.
出处
《电子技术应用》
北大核心
2013年第3期104-107,共4页
Application of Electronic Technique
基金
重庆市教委科学技术研究项目(KJ100520)
重庆市自然科学基金计划(CSTC
2010BB2419)
重庆邮电大学科研基金项目(A2009-23)
关键词
室内定位
蓝牙
指纹技术
小波去噪
indoor positioning
Bluetooth
fingerprinting technology
wavelet de-noising
