摘要
时间延迟估计是现代数字信号处理领域中一个研究热点.在介绍相关时延估计的基础上、重点分析和讨论了基于互累积量时延估计和基于双谱时延估计,并与相关时延估计进行了比较.通过理论分析和实验仿真,得出了基于高阶统计量时延估计方法在对实际含有高斯噪声时间序列信号的估计中具有时延估计精度高,相对误差小,对高斯噪声的消除能力强等优点.
Time-delay estimation is a study hotspot in the field of modern digital signal processing. Time-delay estimation based on mutual-cumulants and based on bispectrum were mainly analysed and discussed on the basis of introducing correlated time-delay estimation, which were compared with correlated time-delay estimation. Theoretical analysis and experimental simulation showed that time-delay estimation had many strongpoints based on higher-order statistis, such as higher accurate time-delay estimation, smaller relatively error and better capability to remove Gauss noise in pratice time sequence signal estimation with Gauss noise.
出处
《天水师范学院学报》
2009年第5期76-78,共3页
Journal of Tianshui Normal University
基金
天水师范学院"青蓝"人才工程项目阶段性成果
关键词
时延估计
互相关
互累积量
双谱
高阶统计量
time-delay estimation
mutual correlation
mutual cumulant
bispectrum
higher-order statistis
