可见光通信(VLC)室内定位技术将照明与通信相结合。相比传统的室内无线定位手段, VLC室内定位技术具有绿色节能环保、成本低廉、无电磁干扰、定位精度高和应用场合广泛等优势, 具有广阔的应用前景。总结了基于光电传感器和图像传感器两类VLC室内定位技术的原理与特点, 重点阐述了当前VLC室内定位技术存在的问题(光源布局不合理、码间干扰和接收装置的灵敏性和稳定性不高)及解决方法(合适的编码方式、正交频分复用技术、分集接收技术和滤波技术等), 讨论了VLC室内定位技术的发展趋势和应用前景。

The visible light communication (VCL) based indoor positioning technology combines lighting with communication. Compared with the traditional indoor wireless positioning means, the VCL based indoor positioning technology shows many advantages such as green, energy saving and environmental protection, low cost, no electromagnet interference, high precision and wide applications, and it has broad application prospects. We summarize the principles and characteristics of two types of VLC based indoor positioning technologies based on photoelectric detectors and image sensors. We focus on the major problems that exist in VLC based indoor positioning technology such as irrational layout of light source, inter-symbol interference and receiving device with low sensitivity and stability. In addition, some solutions are also proposed, such as proper encoding, orthogonal frequency division multiplexing, diversity reception and filtering techniques. Finally, the future development trend and application perspective of VLC based indoor positioning technology are discussed.