Multi-frequency amplitude probability distribution measurement system and its application for electromagnetic interference analysis

Successful development of FFT-based amplitude probability distribution (APD) measurement system has enabled multi-frequency and real-time measurement of amplitude statistics for fluctuating signals. This opens up new possibilities for measurement in a range of areas, including the nonlinear effect on wide-band stochastic signals, and interference in multi-carrier communication systems. This paper presents an overview of the measuring system and its applications, and provides examples.