论文部分内容阅读
根据TDD数字对讲机的特点,以TMS320VC5509A为平台,结合微处理芯片MSP430和射频芯片CC1100,提出了一种数字对讲机系统的结构设计方案,该设备主要应用于抢险、救灾、野外作业等缺乏基础通信设施的环境。设计方案中,利用TMS320VC5509A实现无线语音通信中广泛采用的G.729A语音压缩编码,获得了较低的编码速率和较好的话音质量,在满足话音通信实时性要求的同时,提高了频谱的利用率。
According to the characteristics of TDD digital walkie-talkie, based on the platform of TMS320VC5509A, combined with the microprocessor chip MSP430 and the radio frequency chip CC1100, a structural design scheme of digital walkie-talkie system is proposed. The device is mainly used in the lack of basic communication facilities such as rescue, disaster relief and fieldwork. environment of. Design, the use of TMS320VC5509A wireless voice communications widely used G.729A voice compression coding, access to a lower encoding rate and better voice quality to meet the real-time voice communications requirements at the same time, improve the use of the spectrum rate.