摘要
研究了基于小波变换的信号检测问题，提出了多分辩似然比的概念，表明对检测问题存在一些特定的时频空间，在其中信号的大部分能量得到保存，而噪声能量很快减少，因此应用小波变换，通过对特定的时频空间的似然比分析较容易判断噪声中是否存在信号。
Signal detection based on wavelet transform is studied, and a concept of multiresolution likelihood ratio is put forward. It is shown that there exist some particular spaces in time domain, in which most of the signal energy is conserved while the noise energy is attenuated sharply. Therefore, based on wavelet transform, and by analyzing the likelihood ratio of the particular spaces in time domain, it can be easily determined that whether or not there are some signals mixed in noise
出处
《西南交通大学学报》
EI
CSCD
北大核心
1999年第4期452-456,共5页
Journal of Southwest Jiaotong University
