一种双模对讲机的研究与设计

Study and Design of Dual-mode Interphone

介绍了一种工作在模拟和数字两种模式的对讲机,用于满足对讲机从模拟向数字平缓过渡的需求。系统采用了微控制器与数字信号处理器相结合的方案,具有较好的实用性和可拓展性。着重对系统整体架构,微控制器控制,锁相环电路,发送和接收工作流程进行了介绍。对数字处理进行了阐述。采用TMS320VC5509为核心实现数字部分,不仅可以简化硬件电路,降低成本和功耗,而且可以方便地根据需要选择不同数字处理算法。

For the smooth transition of interphone from analog mode to digital mode,an interphone operating in these two modes is proposed.This system,based on the scheme in combination of MCU with digital signal processor,is of practicability and expansibility.This paper focuses on the introductions of overall system architecture,MCU control,phase-locked loop circuit,and sending/receiving process,including the digital processing.With TMS320VC5509 as the core,the digital baseband system is realized.This could simplify the hardware circuit,lower the cost and power consumption,and is also convenient to choosing different digital processing algorithms.