GPS/DR组合定位方法研究

The theoretical research of GPS and DR intergration positioning

当今,诸多部门如公安、交通和银行等都要求在城市环境中对车辆连续跟踪和不间断定位。如何实现车辆在城市中的高精度连续定位是许多车辆监控和指挥系统及ITS(Intelligent Transportation System)的主要研究课题之一。然而,由于城市中的电波传播环境非常复杂,在其中定位要考虑很多方面的因素。本文就城市环境的特殊性,分析了其影响GPS定位精度的主要误差源,并设计了一种经济可行的组合定位方法——GPS/DR组合定位模式。

Recently in order to promote their working efficiency and safety, many departments such as police, transportation and banking need the contiuous real time positioning of vehicles more and more. But it is a very challenging job to implement the incessant and precise positioning of vehicles in the vehicle control system and Intelligent Transportation System which often operate in the urban environment. The fundamental difficulty is the complexity of the surveying conditions such as the so-called 'urban canyon'and multi-path effect in cities. Considering these reasons, this paper analyzes the main error sources of GPS positioning in urban areas, and develops an economical and practical positioning system,the GPS/DR integration positioning system, to obtain the continuous and precise positioning data of vehicles.