Three-Tone Characterization of Nonlinear Memory Effects in Radio Frequency Power Amplifier
2007 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, Vol. 56, no 6, 2646-2657 p.Article in journal (Refereed) Published
A stepped three-tone measurement technique based on digitally modulated baseband signals is used in characterizing radio-frequency power amplifiers (PAs). The bandwidths of the stepped measurement were 8.8 MHz for the input signal and 26.4 MHz for the output signal. A PA designed for third-generation mobile telecommunication system was analyzed. The amplitude and phase of the third-order Volterra kernel were determined from the identified intermodulation products. The properties of the Volterra kernel along certain paths in the 3-D frequency space were analyzed and compared to some box models for non-linear systems. The main symmetry of the third-order Volterra kernel of this PA was found to be of the type given by the cascaded quadratic nonlinearities with a linear filter in between (a Hammerstein-Wiener system), and frequency dependence, i.e., memory effects, was found to be due to the effects at the baseband.
Place, publisher, year, edition, pages
2007. Vol. 56, no 6, 2646-2657 p.
Behavioral model; Nonlinear; Power amplifier (PA); Radio frequency (RF); Symmetry properties; Volterra kernel
IdentifiersURN: urn:nbn:se:kth:diva-7756DOI: 10.1109/TIM.2007.907958ISI: 000251745500065OAI: oai:DiVA.org:kth-7756DiVA: diva2:12878
QC 20100716. Uppdaterad från Accepted till Published 20100716.2007-12-072007-12-072010-08-24Bibliographically approved