基于噪声抵消技术的时延估计  

Time delay estimation based on noise-canceling

作　　者：郭昕钰 刘嘉琦[1] 王良[1] 宋志杰[1] 

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100

出　　处：《声学技术》2017年第2期177-182,共6页Technical Acoustics

摘　　要：阐述了噪声抵消时延估计法(Time Delay Estimation based on Noise-canceling,TDENC)的基本原理,建立了TDENC分析的估计模型;并进行了大量仿真计算和初步海上试验。仿真结果表明:低信噪比且干扰噪声间相关性较强时,TDENC估计延时明显优于常规方法,但其主峰较宽;干扰噪声间彼此相关但信噪比高,估计时延精度则较差。海上试验结果和理论仿真一致。A time delay estimation method based on noise canceling called TDENC （Time Delay Estimation based on Noise-Canceling） is proposed to improve the time delay estimation performance when the background noise is correla- tive. A TDENC model is formed firstly in this paper, and then computer simulations are carried out to study the per- formance and applicable range of TDENC. Simulation results show that in the case of low SNR and strong correlation between noises, TDENC method is obviously superior to the conventional methods, but the main lobe is broad. How- ever, when SNR is high, the performance of TDENC is worse than the conventional method. The experimental data processing results agree well with the simulation.

关 键 词：时延估计 噪声抵消 最小均方误差 反转修正算法 

分 类 号：TN911.7[电子电信—通信与信息系统]