摘要
以高精度为研究目标,使用适用范围广、系统相对简单易搭建、可移植性好的接收信号强度检测法(RSSI),对可见光通信定位方法进行研究。由于易受到背景光源的干扰,RSSI定位方法的测量误差很难控制在厘米以下。利用小波分析大幅降低接收信号中的噪声,采用相关检测法提取噪声中的源信号,使用最小二乘法估算位置坐标。通过在不同信噪比条件下的仿真对比,验证了方法的可靠性,发现RSSI可见光定位的误差范围稳定在1cm以内且随噪声增率较小,比误差分析计算出的未经处理的理论精度提高了数十倍,明显提高了的定位精度。
Based on received signal strength indicator （RSSI）, which has wide serviceability, simple and easy-to- construct structure, and good portability, we study a visible light communication positioning method with high accuracy. Due to the interference from background resources, the measurement error of RSSI-based positioning method is difficult to control below centimeters. We use wavelet analysis to significantly reduce the noise mixed with received signal, use the correlation test method to extract the source signal in noise, and use the least square method to estimate location coordinate. We verify the reliability of the method by the simulations under different signal-to- noise ratios （SNRs）. It is found that the error of the RSSI-based visible light positioning is less than 1 cm and is insensitive with noise, which is dozens of times better than the theoretical accuracy without processing based on error analysis.
作者
叶子蔚
叶会英
聂翔宇
习小玉
Ye Ziwei, Ye Huiying, Nie Xiangyu, Xi Xiaoyu(School of Information Engineering, Zhengzhou University, Zhengzhou, Henan 450001, Chin)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2018年第3期257-264,共8页
Chinese Journal of Lasers
基金
国家自然科学基金(61705198)
关键词
光通信
可见光通信
室内定位
接收信号强度检测
信号处理
高精度定位
optical communications
visible light communication
indoor positioning
received signal strengthindicator
signal processing
high accuracy positioning
