应急广播FM发射RDS副载波频偏和覆盖范围优化方法研究

Research on RDS Subcarrier Frequency Deviation and Coverage Optimization Method about FM Transmission of Emergency Broadcast

本文基于调频调制输出57kHz RDS副载波信号频偏的计算、测量和调整选择,以及实际终端灵敏度和覆盖范围测试数据,优化模拟调频应急广播消息指令覆盖范围。在实际模拟调频应急广播项目实施中,可以大大优化FM终端RDS应急广播消息接收范围。

This paper aims to do research on optimization the coverage of analog FM emergency broadcast messages.It mainly includes the calculation,measurement and adjustment selection of frequency deviation of 57kHz RDS subcarrier signal,as well as the actual terminal sensitivity and coverage test data.In the implementation of the actual analog FM emergency broadcast project,the receiving range of FM terminal RDS emergency broadcast message can be greatly improved.