基于多频信号融合的WIFI室内定位可行性分析

Feasibility Analysis of WIFI Indoor Positioning Based on Multi-frequency Signal Fusion

首先介绍WIFI通信技术所涉及的硬件布网和实现无线通信网络的基本理论;然后分析了基于WIFI网络的边角测量法、最近接入点法、位置指纹定位法的技术特点,其中WIFI位置指纹定位技术具有信号稳定、运作耗费小、普及性广等特点;再次分析了影响室内定位精度的主要因素和主流定位算法;最后研究分析2.4与5GHz信号在WIFI网络传播的特点,基于2.4和5GHz信号相融的WIFI位置指纹定位技术实现的可能性。

In this paper, we first introduced the basic theories concerning hardware deployment and wireless communication network involved in the WIFI communication technology, then analyzed the technical characteristics of the triangulateration method, nearest access point method and fingerprinting position method based on the WIFI network, among which, the fingerprinting position technology has the advantages of signal stability, low operation cost and wide applicability. Next, we further analyzed the main factors affecting the accuracy of indoor positioning and the mainstream positioning algorithms and at the end, studied the propagation characteristics of the 2.4 GHz and 5 GHz signals in the WIFI network and the possibility of WIFI fingerprinting position technology based on the fusion of the 2.4 GHz and 5 GHz signals.