摘要
Wigner分布是一种真正意义上的时频分析方法 ,但存在其固有缺陷即虚假时频谱 (干扰项 )问题。将实信号转化成所对应的解析信号 ,并采用Choi Williams方法对Wigner分布进行修正 ,实现了对干扰项的有效抑制 ,获得了满意的信号时频谱。给出了用解析信号计算信号Wigner分布及Choi Williams分布算法。通过几个典型信号 (分段多分量信号 ,调频信号等 )对所研制的软件进行仿真实验 ,结果与理论相符 ,表明了软件算法的正确性。
Although as being a real means of time frequency analysis, Wigner Distribution is limited by its falsity time frequency spectrum called interference item.By appliing the analytic signal and the Choi Williams Distribution to repress the interference and the time frequency spectrum got is satisfactory.The algorithm to compute the Wigner Distribution and the Choi Williams Distribution of the signal using its analytic form are fresented. Testifies The algorithm through several simulation tests using some typical signals such as segmented multicomponent signal, frequency modulation signal etc. The result is consistent with the theory. It indicates that the algorithm of the software developed is accurate.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第4期26-30,共5页
Journal of Chongqing University
