数字对讲机dPMR通信系统音频模块设计  

Audio Module Design for Digital Radio dPMR Communication System

作　　者：周光东[1] 谢晓明[1] 

机构地区：[1]北京化工大学信息科学与技术学院,北京100029

出　　处：《单片机与嵌入式系统应用》2013年第8期45-47,55,共4页Microcontrollers & Embedded Systems

摘　　要：介绍了数字对讲机dPMR通信系统音频模块的一种设计方案,给出了硬件结构和驱动软件的设计以及与dPMR协议栈的集成。设计中的主控芯片采用基于ARM Cortex-M4内核的LPC4350;音频编解码芯片采用价格低廉的UDA1380;语音解压缩算法采用MELP算法,采样率选用16ksps。模块具有低功耗、低成本以及高性能的特点。方案具有良好移植性,通过适当调整可集成到其他嵌入式系统中。经过验证,音频模块的性能符合要求,已稳定应用于对讲机系统中。The paper presents one of audio module design alternatives of digital dPMR communication system. It also presents the hard-ware architecture, the driver codes and the integration with dPMR protocol. Microcontroller LPC4350 based on ARM Crotex-M4 core is used as the main controller in the design. UDA1380 which is cheap is used as the coder-decoder chip. MELP algorithm with 16 ksps sampling rate is used for voice compression and decompression. The module has features like low power, low cost and high performance. And it is easy for transplanting and integrating into another embedded system by a few changes. Being verified, the audio module is ap- plied in digital radio system steadily with good performance.

关 键 词：dPMR 音频模块 LPC4350 UDA1380 MELP 数字对讲机 

分 类 号：TN929.54[电子电信—通信与信息系统]