关键词: 嵌入式, 串行通信, 无线通信

Abstract: 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.

Key words: embedded system, serial communication, wireless