Patent ID: 6272441
Filing Date: 2001-08-07
Classification: G01R

Abstract:
A method for the determination of the impulse response g(t) of a broad band linear system which comprises the steps of:a) producing a high frequency clock pulse with a frequency of f.sub.c.gtoreq.100 MHz;b) producing a periodic MLBS m(t) of the order m, and a period length of 2.sup.m -1 pulses of the high frequency clock pulse;c) amplificating and coupling the periodic MLBS m(t) as test signal x(t) to the broad band linear system;d) receiving and amplifying the response signal of said broad band linear system as a measured signal y(t) to adapt it in its amplitude to the next following units;e) providing a sampling clock pulse by dividing the high frequency clock rate by the factor of 2.sup.n ;f) sampling the analog measured signal over at least 2.sup.n periods, and providing sampled analog values, whereby the sample time points are predetermined through the sample pulse and during each period 2.sup.m -1/2.sup.n sampled data are gathered;g) converting said analog sampling values into digital sampled values; and,h) determining the impulse response g(t) through calculation of the cross-correlation .psi. between the test signal and said digital measured signal under carrying out of a fast Hadamard-transformation (FHT) by determining the order of said digital sampled values.