Abstract: This paper designs an aircraft-borne telephone conversation system based on RS485. The system completes transition from analog to digital in the aero communication, which using TDMA on the data bus. It Introduces scheme of the system, realizes real-time communication with multiple group, simultaneously completes to monitor the information of the control, alarms and records the voice of airborne.

Key words: Time Division Multiple Access(TDMA), system synchronous, digital mixed, RS485

摘要： 依据机载设备数字化要求，设计一种基于RS485总线的DSP嵌入式机载通话系统，采用数据总线分时复用方法，提高系统的可靠性和实时性，该系统完成了机载通话系统由模拟向数字制式的过渡。分析系统的硬件与软件设计方案，实现机内人员、地勤人员以及与地面塔台之间的多方实时通信，完成对各种控制、警告信号的监听和空中通话记录功能。

关键词: 时分多址, 系统同步, 数字混音, 485总线

CLC Number: 

• N945