Rational Function and Distributed Two Block Architecture based Models for the Mitigation of Various Imperfections in Direct Conversion Transmitters

Date
2013-09-30
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Abstract
Nonlinearity in power amplifiers and in-phase and quadrature-phase (I/Q) imperfections in the transmitter are of enormous concern. Two models to alleviate these imperfections have been proposed. The first method employs a Rational Function based model for the joint mitigation of these impairments, while the second method is a Memory Polynomial based distributed two block model. The Rational Function model has an improvement of around 2 dB in NMSE and around 3 dB in ACEPR than the state of the art parallel Hammerstein based model. For the distributed two block model, we are able to reduce the complexity while maintaining reasonable performances. The number of coefficients and the number of floating point operations are reduced by around 17 percent, matrix conditioning is improved by 12-33 dB and the dispersion coefficient is reduced by 16-42 dB as compared to the previously proposed joint modulator and power amplifier nonlinearity compensation technique.
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Keywords
Electronics and Electrical
Citation
Aziz, M. (2013). Rational Function and Distributed Two Block Architecture based Models for the Mitigation of Various Imperfections in Direct Conversion Transmitters (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/27536