A Correlation Based Method for Measuring and Monitoring the Impulse Response of Analog LTI Systems with low Realization Cost

Abstract

This article deals with the problem of measuring the impulse response of a linear time invariant (LTI) analog network. At the beginning three known measurement principles are discussed and compared with respect to their advantages and disadvantages. It is shown that good results can only be attained at the cost of measurement expense. Subsequently a new correlation based method is presented where low complexity and high quality results have not to be a contradiction. The measurement circuit basically consists of two m-sequence generators and an analog low pass filter. The characteristics of the proposed measurement circuit are examined and explained by two examples.