Bandpass adaptive pole-zero filtering

An adaptive pole-zero filter comprised of a bank of bandpass filters is presented. The bandpass filters permit the adaptive filter to be realized in a parallel form of first-order sections. Simple monitoring of the filter poles during adaptation is therefore possible so that stability can be ensured. This paper focuses on bandpass filters which are implemented by a frequency-sampling structure; the use of other types of bandpass filters is briefly discussed. An application in system identification is described and computer simulation results are given.