基于AT89C55的单工无线呼叫和数据传输系统设计

摘要

Based on STC89C55, a simplex wireless call and data transmit system was designed by analog frequency modulation technique. In the frequency interval of 30 -40 MHz, the transmittal of long distance and simplex by small power that voice signals are inputted through microphone and line was realized. The host and subordinate machines can undertake smart communication by frequency shift keying( FSK) modulation mode. There are 256 subordinate stations in our architecture, forming a one-to-multiple point, simplex wireless call and data transmit system.%基于STC89C55,使用模拟调频技术,设计了一种单工无线呼叫数据传送系统,在30～40 MHz频段上,实现了话筒输入和线路输入语音信号的小功率远距离单工发送和接收.其数据通信采用FSK调制方式,主、从机可实现智能控制通信,可连接多达256个从站,构成一点对多点的单工无线呼叫系统.