卫星信号模拟器中多普勒频移模拟的研究  

Research on of Simulation Doppler Frequency-Shift in Satellite Signal Simulator

作　　者：刘洁[1] 廉保旺[1] 李智君[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《信息安全与通信保密》2008年第1期52-54,共3页Information Security and Communications Privacy

摘　　要：文章分析了动态环境下多普勒频移的产生,研究了多普勒频移的估算方法并建立了数学模型,在此基础上提出了一种运用DSP结合专用的DDS芯片AD9954模拟多普勒频移的方案。并根据所模拟数据的要求选择了一种可行AD9954的工作模式,介绍了参数的计算方法,给出了DSP控制AD9954进行多普勒频移模拟的程序流程。The production of Doppler frequency-shift is analyzed under the high dynamic condition. The algorithm of Doppler frequency-shift estimate is studied, and then mathematic models are listed. On this basis, a scheme for utilizing DSP, which is integrated with a professional Direct Digital Synthesizer AD9954, to simulate Doppler frequency-shift is proposed. A feasible working mode for AD9954 is selected in the light of the need for the data to be simulated. The method for calculating necessary parameters is described. Finally the program flow chat for DSP controlling AD9954 to simulate Doppler frequency-shift is advanced.

关 键 词：卫星信号模拟器 多普勒频移 AD9954 DDS 

分 类 号：P228.1[天文地球—大地测量学与测量工程]