无线自组网语音通信终端设计

Design of wireless Ad-hoc networking voice communication terminal

针对目前国内矿井下语音通信不够灵活或者通信系统成本过高的情况,设计了一种低功耗、低成本、使用灵活高效的手持式语音通信终端。通过采用ZigBee自组网技术灵活搭建通信网络,多跳延伸通信距离,并且针对ZigBee由于传输速率低的而不能很好传输语音的问题,本设计使用IMA-ADPCM算法进行语音压缩以保证高通话质量的前提下适应ZigBee的低传输速率特性。经试验证明,本语音通信终端功耗可低至0.63 W,在井下点对点通信距离可达到28.76 m,语音信号传输平均误码率仅为1.95%。

A hand-held voice communication terminal which is of low power consumption, low cost, flexibility and efficiency in use is designed. Aming at the problem ,ZigBee Ad-hoc networking technology is adopted to achieve the purpose of building up communication network flexibly, and extending the communication distance by multihop. Moreover, considering the problem that voice Can not be well transferred due to ZigBee＇s low transmission speed, IMA-ADPCM algorithm is utilized to compress voice, which may adapt to ZigBee＇s low transmission speed under the premise of ensuring high-quality voice communication. Experiments prove that the power consumption of this voice communication terminal can be as low as 0.63 W, the underground point-to-point communication distance can reach 28.76 m, and that the average bit error rate of the voice signal transmission is only 1.95%.