基于载波相位的室内伪卫星定位系统设计方案

A Design Scheme of Indoor Pseudolites Positioning System Based on Carrier Phase

提出了一种基于载波相位的室内伪卫星定位系统设计方案。通过伪卫星上加装双天线、设定合理的天线基线长度,同时采用频分和码分多址技术,实现了基于载波相位测量距离差的双曲面定位体制,较好地解决了传统伪卫星定位中存在的时钟同步、多路径条件下测距精度提升和远近效应等技术难点。仿真结果表明,有利于提高室内伪卫星的定位精度。

This paper proposes a design scheme of indoor pseudolites system based on carrier phase measurement. The proposed scheme is based on hyperboloid positioning principle by using carrier phase measurement difference. Each pseudolite has dual antennas, broadcasting two CDMA signals in a frequency. Signals between pseudolites are multiplexed by FDMA. The scheme eliminates or alleviates the clock synchronization problem, multipath effects and near-far effect, which are serious in the traditional pseudolites positioning system. Simulation show that the scheme has a better performance in positioning accuracy.