井下电机车载波电话自适应除噪技术的应用

针对井下架线电机车载波电话中严重的随机噪声,提出应用DSP技术和自适应滤波理论进行消除噪声的技术方法,对话筒周围的环境噪声,采用带参考输入的最小二乘法（LMS）横向滤波结构,可以取得较区的与噪声相关的住处,消噪效果明显,由于滤除架空线载波信号中的噪声中,不能直接取得与噪声相关的信号,刚采用载频信号增强技术,从宽带噪声中提取有用信号。

The applying of adaptive noise canceling technology on carrier telephone of electric locomotive undergrourd

The paper brings forward applying DSP technology and adaptive filtering theory to eliminate noise aiming at the serious stochastic noise on the carrier telephone of electric locomotive undergrourd.Adopting LMS transverse filter with referenced input to the environmental noise around of transmitter,more information related to noise can be gotten and the effect of elimination noise is apparently.Because the signal related to noise directly cannot be picked up during filtering noise in carrier signal,the carrier freqnency signal amplifying technology may be adopted to pick up available signal from broad band noise signal.