摘要
为了适应强噪声环境下的Chirp信号探测 ,提出了离散小波变换时频分布的二维相关算法 ,即利用发射信号和反射信号的时频分布相似性 ,估计接收信号中各个反射信号分量的时间延迟。仿真结果证明 ,该算法具有更强的压制噪声的能力 ,能准确地进行信号检测和时延估计。
In order to make Chirp signal detection adapting environment of high interference, two dimensional correlation algorithm of discrete small signal transfer time frequency distribution is state. With this method,by using the similarity of the transmission signal and reflection signal, the time delay of each reflective signal element in receiving signal is estimated. The practical simulation shows that the algorithm offers higher noise suppression capability and is able to implement precise signal detection and time delay estimation.
出处
《自动化仪表》
CAS
北大核心
2003年第10期14-17,共4页
Process Automation Instrumentation
基金
国家自然科学基金资助项目 (编号 :496742 32 )
关键词
离散小波变换
时频分布
二维相关
信号检测
时延估计
CHIRP信号
Discrets small wave transfer Time frequency distribution Two dimensional correlation Chirp signal Signal detection Time delay estimation
