Volterra Behavioral Model for Wideband RF Amplifiers

This paper proposes a behavioral modeling approach for the description of nonlinearities in wideband wireless communication circuits with memory. The model is formally derived exploiting the dependence on frequency of the amplifier nonlinear transfer functions and reduce the number of parameters in...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2007-03, Vol.55 (3), p.449-457
Main Authors: Crespo-Cadenas, C., Reina-Tosina, J., Madero-Ayora, M.J.
Format: Article
Language:English
Subjects:
Amplifiers
Amplitude modulation
Applied sciences
Behavioral models
Broadband amplifiers
Channels
Circuit properties
Circuits
Constellations
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency
Mathematical models
microwave amplifiers
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Multiaccess communication
nonlinear memory effects
Nonlinearity
Phase shift keying
Pulse amplifiers
Radiofrequency amplifiers
Transfer functions
Volterra series
Wideband
Wireless communication
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Summary:This paper proposes a behavioral modeling approach for the description of nonlinearities in wideband wireless communication circuits with memory. The model is formally derived exploiting the dependence on frequency of the amplifier nonlinear transfer functions and reduce the number of parameters in a general Volterra-based behavioral model. To validate the proposed approach, a commercial amplifier at 915 MHz, exhibiting nonlinear memory effects, has been widely characterized using different stimuli, including two tones, quadrature phase-shift keying wideband code division multiple access, and 16-quadrature amplitude modulation signals with rectangular and root-raised cosine conforming pulses. The theoretical results have been compared with experimental data demonstrating that the model performance is comparable to the well-established memory polynomial model. Calculated and measured baseband waveforms, signal constellation, spectral regrowth and adjacent channel power ratio are tightly coincident in all cases, emphasizing the relevance of the proposed model
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2006.890514