调频广播授时信号的接收技术研究

The Research of receiving techniques for the signal of FM broadcast time service

利用调频广播附加信道进行标准时间的广播,一方面可以增加调频广播频谱利用率;另一方面可以增强授时信号的覆盖范围,特别在城市复杂环境下有着重要的应用价值。首先介绍了利用调频广播附加信道进行授时的原理,然后重点阐述了定时接收机基带信号处理方法,设计了信号解调、解扩、捕获、跟踪等方案并进行了仿真验证,结果显示该方案能实现定时功能,定时精度满足设计要求。

Using FM broadcast additional channel to broadcast standard time,on the one hand,it can increase the utilization rate of FM broadcast spectrum;on the other hand,it can enhance the coverage of time service,especially in the complex urban environment.The principle of usage of FM broadcast additional channel for timing is illustrated firstly in this paper,and then the timing receiver baseband signal processing method is expounded in detail.In this paper,we designed a scheme of demodulation,dispreading,PN code tracking acquisition and took a simulation,the results showed that the scheme can realize the timing function,and timing precision meet the design requirements.