A digital signal-processing approach for phase noise measurement

摘要: A digital signal-processing method for phase noise measurement is presented. By properly over-sampling the input signal and adopting an optimized quadrature demodulation scheme, grants acceptable performance in analyzing sinusoidal carriers, frequencies of which range from fractions hertz up to hundreds megahertz. Moreover, shows itself a valid alternative both analog systems, especially evaluation close-to-the-carrier time interval analyzers, particularly carrier greater than few units At first, fundamental stages proposed are described detail. Its theoretical then derived compared that offered by other solutions already available on market. Finally, results experiments carried out actual sources