文档介绍：基于ZigBee的无线语音传输系统的设计
摘要:ZigBee技术是一种短距离、低复杂度、低功耗、低速率、低成本的无线网络技术。其主要特性包括:具有多跳传送(multi-hop relay)机制、网络扩展性能好、布设容易以及具有自组织与自修复能力。在无线传感网络的应用中,声音也是一种传感量,传输采样的声音数据正是声音传感应用的基本要求,,提出实现语音通信的研究课题。
2430芯片的Zigbee硬件模块,经过了解,在空旷环境下的视距传输距离大约30米;,开发了硬件试验平台,用以研究短距离的无线语音通信技术。2430 SoC的性能特点,使用芯片内部的ADC和APR9600完成语音采样及回放,无需外部的语音编解码器件且使用的外围器件很少。系统可以很好地实现实时语音无线传输,发射功率小于0 dBm,语音延时小于25ms,传输距离达到15米,音质MOS测试分达到3分以上。该方案硬件简单,成本低廉,功耗很低,可应用于矿井井下生产、无线传感器网络、消防、安全监控领域,。
关键词:; ZigBee; CC2430; APR9600; 无线语音通信
Based on ZigBee wireless voice transmission system design
Abstract:ZigBee technology is a kind of short, plexity, low power consumption, low rate, low cost work technology. Its main features include: with multiple hops transmission (multi - hop relay) mechanism, extend work performance is good, layout easily and has anization and the self-repairing ability. In wireless work applications, the audio is also a kind of sensor volume, transmission sampling voice data is the basic requirement of voice sensing, so this paper the application of / ZigBee proposed realize munication environment, the research subject.
This topic was designed based on 2430 chip Zigbee hardware modules, after understanding in open environment, the transmission distance stadia about 30 meters; On the basis of designed on the basis of munication system solutions, developed hardware test platform to study the sprint wireless munications technology. munications plan make full use 2430 SoC performance characteristics, use chip pleted internal ADC and speech sampling and playback, without external voice codec pieces and use of peripheral devices seldom. System can well realize real-time speech wireless transmission, transmission power, less than 0 dBm 25ms speech delay, the transmission distance to less than 15 meters, timbre MOS test points to three points. The scheme hardware simple and low cost, low power consump