中频GPS L1信号的模拟和实现
首发时间:2006-11-27
摘要:文章提出了用卫星的导航电文数据反过来计算GPS卫星L1载波多普勒频率和时间延迟的办法来计算机模拟GPS中频L1信号,并且用计数器的方法来实现载波、测距码和导航电文的同步。结果表明,模拟的GPS中频信号的频谱跟实际的GPS信号频谱相似,可以为软件接收机的算法的验证和改进提供第一手资料。
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THE COMPUTER SIMULATION OF GPS L1 IF SIGNAL
Abstract:This article proposed a method of computing the GPS satellite L1 carrier wave Doppler frequency and signal propagation delay time with the input ephemeris data. And the IF carrier, the C/A code and the data stream are synchronized by counter. Form the simulation results, we can see that the simulated GPS IF signal’s spectrum is similar with the true GPS signal’s and the simulated data can be used for future development of software GPS receiver.
Keywords: GPS IF (Intermedium Frequency) signal simulation
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No.9904310441164600****
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