伪码扩频测距系统中多径误差的实验测量与分析

Experimental Measurement and Analysis of Multipath Induced Bias in Ranging System with PN Spread Spectrum Technique

利用扩频测距发射与接收设备,设计了多径误差测量实验,获得了测距误差随多径延迟变化的实测数据,并针对实验进行理论建模与分析仿真,计算结果与实测数据基本吻合,证明了扩频测距系统中多径分析与仿真模型的正确性,确认了多径引入的扩频测距误差的影响量级。

In this paper the multipath signal model in PN spread spectrum ranging system is put forward.The multipath induced ranging bias is analyzed in detail,and simulated with typical parameters.In order to validate the multipath signal model,a novel experiment for measuring the multipath induced bias is brought forward,which uses a specific PN spread spectrum device.And the computer simulation corresponding to the experiment setup is also done,which agrees the experimental result very well.The simulation and the experiment result validate the previous signal model and testify the magnitude of the multipath induced bias.