阵列天线空时GPS中频信号建模与仿真

摘要：该文通过分析GPS信号的特性对单天线GPS中频信号进行建模，给出了阵列天线空时GPS中频信号的模型. 建模过程考虑了卫星星钟误差、大气层误差、接收机钟差、噪声等各种误差因素的影响. 设计了阵列天线空时GPS中频信号仿真器，该软件具有设计灵活、可扩展、易于使用的特点. 利用频谱分析方法对仿真生成信号的正确性进行验证，并应用空时自适应处理方法验证了阵列天线空时GPS中频信号模型的正确性. 关键词：

Modeling and Simulation of Space-Time Array GPS IF Signal

In this paper, we establish a model of single antenna GPS intermediate frequency signal by analyzing the characteristics of GPS signal. The array-antenna space-time intermediate frequency(IF) signal is modeled based on the single antenna model. To ensure accuracy of the model, satellite clock error, atmospheric error, receiver clock error and noise are considered in the analysis. We also design a space-time GPS data simulator, which is flexible, scalable and easy to use. The signal model is validated with spectral analysis and its accuracy verified by space-time adaptive processing.