Abstract
Most parametric frequency-domain estimation methods, applied to linear time-invariant systems, do not take into account the disturbing input noise. It is shown that these estimators can still be used to obtain unbiased estimates from noisy input-output measurements if an input signal with a constant signal-to-noise ratio is used. By means of an experiment in the field of modal analysis, it is demonstrated that a multisine excitation can be used to create an input signal with a constant signal-to-noise ratio, even when the disturbing noise at the input is strongly colored. It is shown that multisines allow a very efficient (low crest factor and time factor) and fast synthesis of the wanted input signal.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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