Weak Signal Detection and Recovery from Nonuniform Samples Using Notch Filter
Anmin Wang, Chen Liangfu · Signal Processing · 2009
The theory of nonuniformly sampling is widely used because of its many advantages.A novel notch filter method for nonuniform sampling is studied in this paper.This method is very effective to suppress noise of spectrum by filtering the signal with the maximal amplitude so that it can detect the low amplitude signal.The real signal can be recovery from the digital signal by IFFT after notch filter.The fundamental of notch filter and threshold filtering are introduced,the characteristics of the notch filter are analyzed,and the processing procedure of notch filter is presented.