摘要
针对信号检测实际应用中出现的多道信号检测问题,在建立了单信源多道信号检测一般模型的基础上,推导出在含有相关干扰源的检测环境中的最佳多道线性滤波器——多道维纳滤波器,以及当满足某些特定条件时该多道维纳滤波器的简化形式。同时提出采用多道自适应滤波器结构逼近该理想的多道维纳滤波器的系统结构,并证明其收敛性。
In this paper, the author proposes and constructs a generalised model of multichannel single-source signal detection when both of uncorrelated and correlated interferences are present simultaneously in noisy background. The optimal multichannel linear filter-OMLF (multichannel Wiener filter) is derived according to the newly proposed mathematical model, of which the single channel Wiener filter is only a special case when the number of the channels used is one. It is proved in the paper that if some certain conditions are met, the OMLF could be simplified to a large extent, as is thus very useful for some applications of multichannel signal detection. Although it may be very difficult and even impossible to implemet and obtain the real OMLF as the knowledge of the statistical characteristics of the signal and the noise, the multichannel adaptation method can be used to approach the ideal structure of OMLF. The convergence of the multichannel adaptation is also proved theoretically in the paper.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
1992年第4期27-34,共8页
Journal of the China Railway Society
关键词
信号
检测
滤波器
自适应滤波
multichannel signal detection, Wiener filter,adaptive filter
