中国激光, 2018, 45 (3): 0306002, 网络出版: 2018-03-20
基于接收信号强度检测的高精度可见光定位方法 下载: 1349次
High-Accuracy Visible Light Positioning Method Based on Received Signal Strength Indicator
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 strength indicator signal processing high accuracy positioning
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1 cm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。
Abstract
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.
叶子蔚, 叶会英, 聂翔宇, 习小玉. 基于接收信号强度检测的高精度可见光定位方法[J]. 中国激光, 2018, 45(3): 0306002. Ye Ziwei, Ye Huiying, Nie Xiangyu, Xi Xiaoyu. High-Accuracy Visible Light Positioning Method Based on Received Signal Strength Indicator[J]. Chinese Journal of Lasers, 2018, 45(3): 0306002.