摘要
矿井通信急需解决的问题是提高通信系统的抗干扰性能和通话质量。间断传输技术(DTx)通过发射端有无话音信号自动调整发射机的开和关来达到减小系统干扰、提高通话质量和节省移动台功耗的目的,特别适用于干扰噪声大的煤矿井下通信。本文论述了DTx技术的原理及相应的话音活性检测技术和舒适噪声产生技术,并对DTx技术在矿井通信中的应用进行了探讨。
The problems in need of immediate solutions in coal mine communication are feeble antiinterference ability and poor speech quality. By autoregulating opening and closing of transmitter during speech or silence periods, discontinuous transmission (DTx) can reduce the interference, in return increases speech quality and saves power wasting, especially this technology is comported with large noise underground coal mine. This paper discusses DTx principle and correlative techniques, such as voice activity detection (VAD) and comfort noise generation (CNG). The application of DTx technology to mine mobile communication is discussed lastly.
出处
《煤矿机电》
北大核心
2003年第5期112-113,116,共3页
Colliery Mechanical & Electrical Technology
