计算机串行无线通信的抗干扰研究

Study on wireless serial communication based on ASK

很多嵌入式设备中的无线串行通信采用ASK调制方式。串口通信具有突发通信的特点,当发射方没有数据发射的时候,高增益接收模块会接收到很多干扰信号,干扰的存在使通信口无法判断通信数据到来的时刻。对干扰的种类进行了分析,通过在不修改原有的串行通信的基础上,添加通信同步头来实现接收同步,针对通信同步头的接收,给出了接收状态机的描述。

Serial communication in many embedded systems adopt wireless module whose modulation style is ASK.The character of serial communication is in burst mode.While there is no data sending from the sender,the communication jamming will be emerged as the high gain of receiver,the effect is that the uart program unable to find the start of data packet.This paper analyzes the types of wireless communication jamming,then proposes a method that by sending synchronize head before serial communication to make the communication peer possible receive the data packet.The authors also describe the receiver side state machine on synchronize bit receive.