On Models for 1/f Noise Processes
Abstract
A noise phenomenon which is often dominant at low frequencies is comprised of those processes which are called 1/f noise, flicker effect, and sporadic processes. These processes are characterized by a power spectral density which varies as 1/((the absolute value of f) to the power alpha) where 0 = or < alpha = or < 2. They have been observed over a wide range of frequencies in such diverse situations as vacuum tube and semiconductor noise, the spectrum of sea waves, and ultra-precise time standards. Some of these processes are not admissable in the usual Wiener-Khinchin theory of random processes. On the other hand, their extensive occurrence suggests that some accomodation must be made for them in the organized theory. It is the purpose of this paper to consider several approaches to the modeling of such 1/f processes. It will be shown that models do exist which satisfactorily explain observed phenomena while retaining adequate connection with the underlying physics of the model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1970
- Accession Number
- AD0721450
Entities
People
- John B. Thomas
- Kevin C. Daly
Organizations
- Princeton University