基于FPGA的低成本GPS信号模拟器设计
기우FPGA적저성본GPS신호모의기설계
Low Cost GPS Simulator Based on Single FPGA
  • 万方数据
    计算机测量与控制 계산궤측량여공제
    COMPUTER MEASUREMENT & CONTROL
    2009年 7期 1365-1367 ,共3页

    单庆晓%钟小鹏%陈建云%杨俊

    단경효%종소붕%진건운%양준

    GPS信号模拟%FPGA%数字延迟滤波器 GPS信號模擬%FPGA%數字延遲濾波器
    GPS신호모의%FPGA%수자연지려파기
    GPS RF signal simulation%FPGA%digital delay filter
    本文介绍了一种低成本的GPS信号模拟器的设计,根据GPS信号的数学模型.设计了采用FPGA实现所有基带处理功能的方案.利用码发生器产生GPS各卫星的伪随机码,采用数字延迟滤波器实现信号的延迟处理,采用多级采样率转化器和滤波器串联的方法提高延迟精度,生成的多星基带信号在数字域进行叠加,再通过正交射频调制得到L1频点的GPS信号;该GPS信号模拟器结构简单,成本低,生成的GPS信号精度高,可以满足部分GPS接收机的测试需求.
    본문개소료일충저성본적GPS신호모의기적설계,근거GPS신호적수학모형.설계료채용FPGA실현소유기대처리공능적방안.이용마발생기산생GPS각위성적위수궤마,채용수자연지려파기실현신호적연지처리,채용다급채양솔전화기화려파기천련적방법제고연지정도,생성적다성기대신호재수자역진행첩가,재통과정교사빈조제득도L1빈점적GPS신호;해GPS신호모의기결구간단,성본저,생성적GPS신호정도고,가이만족부분GPS접수궤적측시수구.
    This paper proposes a low cost GPS simulator. A system based on FPGA is constructed to realize base band signal process of GPS. Code generator generates pseudo number of each SV. Pseudo-range delay is simulated by cascaded digital delay filter. Multiple sampling and cascaded filter are applied to raise delay accuracy. Base band signal of multiple SV are superimposed at digital field, then is orthogonal modulated to 1575.42MHz frequency. The GPS simulator is simple and low cost. The generated signal is accuracy enough to meet the test of most GPS receiver.
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