Method of minimising the effect of disturbances on the estimate of the impulse response of a linear system

A method is proposed whereby the errors in the estimate of the impulse response, obtained from pseudorandom-binary-signal correlation experiments, due to low-frequency drift at the output of the system may be reduced. In particular, errors due to a constant, a linear, a quadratic and a cubic term in the power-series representation of the noise are eliminated. Moreover, the bias on the estimate of the impulse response, due to the nonzero value of the autocorrelation of the binary sequence for nonzero delays, is eliminated.