基于改进算法的语音增强在激光侦测系统中的应用  

Application of Laser Detector System Based on Improving Algorithm in Speech Enhancement

作　　者：田玉敏[1] 陈海清[2] 曾文锋[1] 

机构地区：[1]武汉军械士官学校光电教研室,湖北武汉430075 [2]华中科技大学光电子科学与工程学院,湖北武汉430074

出　　处：《光电子．激光》2007年第12期1489-1491,共3页Journal of Optoelectronics·Laser

摘　　要：为了消除噪声所引起的语音信号的衰落,以自适应滤波器为基础,并综合泄漏最小均方(LMS)算法和变步长LMS算法的优点,提出了适用于激光侦测系统的可变泄漏最小均方(VL-LMS)自适应滤波新算法,对其原理进行了剖析。用实测的带噪语音信号进行了动态仿真,结果表明,该算法能有效地克服基于LMS算法的自适应谱线增强器的不足,具有良好的抑制高斯噪声能力和跟踪性能。In order to suppress the signal fading induced by noise,we unified the advantages of leakage least mean square （LMS） algorithm and variable step size LMS algorithm to develope a variable leaky I.MS algorithm based on laser detector. The measured speech signal with noise was dynamically simulated by the proposed algorithm. It is shown that the proposed algorithm can effectively overcome the shortcomings of the traditional LMS-based ALE algorithm and has a great capability of suppressing Gaussian noise and a good performance of tracing time-varying signals. The proposed algorithm provides a new technical means for the speech enhancement in laser detector systems.

关 键 词：激光侦测 可变泄漏最小均方(VL-LMS)算法 自适应滤波 语音增强 高斯噪声 DSP 

分 类 号：TN912.3[电子电信—通信与信息系统]