电子对抗通信系统中的话音终端设计

电子对抗(EW)通信系统话音终端以单片机为核心，具有单机和程控用户两个端子．其模拟用户接口电路使用MH88610芯片；CVSD话音编解码采用FX609J话音编解码器；DTMF双音多频收发电路由MT8880和双向开关4066等构成；并配备上电自检和看门狗等电路．其软件设计充分考虑了单机和程控的两种通话类别，采用中断方式实现串口收发，并对各种异常事件进行了处理．故该话音终端在电子对抗通信系统中工作可靠，话音清晰，抗干扰性强，保密性好。

Design of Voice Terminal for EW Communication System

The voice terminal for electronic warfare (EW) communication system is controlled with microcomputer, and it has two interfaces for telephone and PABX. MH88610 is used in analog circuit of user interface. FX609J is used in the circuits of continuously variable slope delta (CVSD) code and decode. DTMF circuit consists MT8880 and 4066, it adds self-check and watchdog circuit. The software was designed aiming at two kinds of telephone and PABX, the serial communication was realized with interrupt mode, and all kind of exceptional events were processed. The voice terminal has a lot of advantages such as good sound, high anti-jamming property and better security.