通道非理想特性对导航信号相关峰的影响分析

摘要

GNSS (Global Navigation Satellite System ) signal is likely to be affected in the process of producing ,transmitting ,spreading and receiving .In view of the non-ideal characteristic of RF-channel ,the GNSS signal quality monitoring and assessment can be car-ried out and the abnormal of the frond-end can be found and warned .In this regard ,there is no comprehensive system research results at home and abroad at present .So it can't effec-tively evaluate the influence of non-ideal characteristic of channel on the quality of navigation signal .This paper establishes the non-ideal model of the RF-channel ,and analyses the im-pact of the different frequency characteristics on GNSS signal correlation peak by a naviga-tion signal correlation peak assessment method .The simulation results show that the non-i-deal characteristic of channel can cause a large effect on .%卫星导航信号质量直接影响导航系统的各项性能指标 ,因此信号质量评估是卫星导航系统设计和运行控制过程中的重要环节.接收射频通道幅频特性和相频特性会对信号质量的评估产生影响.本文主要针对导航信号相关峰等评估方法 ,建立射频通道的非理想模型 ,分析通道不同频率特性对GNSS 信号相关峰的影响.仿真结果表明:通道的非理想特性会对导航信号产生较大的影响.