Patent ID: 8093909
Filing Date: 2012-01-10
Classification: G01R

Abstract:
1. Method for measuring the phase noise of a signal comprising: registering a measurement signal with a given measurement frequency and with a superimposed phase noise, subdividing the measurement signal into a first measurement signal and a second measurement signal in each case with the given measurement frequency and with the superimposed phase noise, deriving a first signal from the first measurement signal with a first frequency reduced by frequency reduction relative to the measurement frequency and the superimposed phase noise, deriving a second signal from the second measurement signal with a second frequency reduced by frequency reduction relative to the measurement frequency and the superimposed phase noise, determining a third signal with a third frequency compensated by the measurement frequency relative to the first frequency of the first signal, determining a fourth signal with a fourth frequency compensated by the measurement frequency relative to the second frequency of the second signal, and determining a correlation spectrum from the third and fourth phase, wherein the frequency reduction is implemented by frequency division of the frequency of the first and second measurement signal, so that the third and fourth frequency of the third and fourth signal comes to be disposed in each case within the frequency range of the correlation spectrum.