基于OFDM的中波广播电台时间自动同步方法

An Automatic Time Synchronization Method for Medium Wave Radio Based on OFDM

常规中波广播电台时间自动同步方法依托PTP协议通过延时响应机制进行时间同步,但是易受单载波干扰,导致时间同步相对误差大,因此,提出基于OFDM的中波广播电台自动同步方法。通过过滤广播节点异常时间数据,优化时间同步数据,采用OFDM划分高速数据流为若干相对较低速的数据,利用广播节点报时信号特点匹配特征,实现时间自动同步。实验结果显示,设计方法的时间同步相对误差更小,具备更高的应用价值。

An automatic synchronization method for medium wave radio stations based on OFDM is proposed in order to improve upon the vulnerabilities of the conventional time synchronization method that relies on the Precision Time Protocol(PTP).The conventional method is vulnerable to single carrier interference,which introduces a large relative error of time synchronization.The proposed method addresses this issue by optimizing the time synchronization data through filtering abnormal time data from the broadcast node.OFDM is then used to divide the high-speed data stream into several relatively low-speed data to enable automatic time synchronization.The time signal characteristics of the broadcast node are utilized to facilitate the automatic time synchronization.Experimental results demonstrate that the proposed method has smaller relative error of time synchronization and greater application value,as compared to the conventional method.