Phase noise coherence of two continuous wave radio frequency signals of different frequency. Issue 1 (1st January 2017)

• Record Type: Journal Article
• Authors: Rönnow, Daniel; Amin, Shoaib; Alizadeh, Mahmoud; Zenteno, Efrain
• Is Part Of: IET science, measurement & technology. Volume 11:Issue 1(2017)
• Page Start: 77
• Page End: 85
• Publication Date: 2017-01-01
• Subjects: phase noise -- phase measurement -- electric noise measurement -- correlation methods -- spectral analysers -- signal generators; phase noise coherence -- continuous wave radiofrequency signal -- uncorrelated phase noise spectra -- correlated phase noise spectra -- PNS -- multiplicative factor -- mixing product -- spectrum analyser -- signal generator -- phase‐coherent generator -- nonphase‐coherent generator -- frequency 10 Hz to 1 kHz; Measurement -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Periodicals; Nanotechnology -- Periodicals; Electromagnetism -- Periodicals; Medical instruments and apparatus -- Periodicals; 621.3
• DOI: 10.1049/iet-smt.2016.0203
• Languages: English
• ISSNs: 1751-8822

Abstract

Abstract : A method is proposed for determining the correlated and uncorrelated parts of phase noise spectra (PNS) of two continuous wave radio signals of different frequencies, ω 1 and ω 2 . The PNS of the two signals and of mixed signals are measured. The PNS are modelled as having a correlated part that is the same for both signals, except for a multiplicative factor, and uncorrelated parts, that are different for the two signals. A property of the model that the PNS of some mixing products are linear combinations of the PNS of the signals at ω 1, ω 2, and ω 1 − ω 2 is experimentally verified. The difference of the PNS at ω 1 + ω 2 and ω 1 − ω 2 is proportional to the correlated part of the PNS and is a part of auxiliary functions that are used for finding the multiplicative factor and the correlated, partly correlated, and uncorrelated phase noise at different offset frequencies. A conventional spectrum analyser was used to characterise two signal generators, a phase‐coherent and a non‐phase‐coherent one. For the phase‐coherent generator the phase noise of two signals was found to be correlated for offset frequencies below 10 Hz, partly correlated for 10 Hz–1 kHz and uncorrelated above 1 kHz.