A method and an apparatus to analyze two measured signals that are modeled as containing desired and undesired portions such as noise, FM and AM modulation. Coefficients relate the two signals according to a model defined in accordance with the present invention. In one embodiment, a transformation is...http://www.google.es/patents/US7489958?utm_source=gb-gplus-sharePatente US7489958 - Signal processing apparatus and method
