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Improvement in the Linearity of a LINC Transmitter using Genetic Algorithms

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3 Author(s)
Garcia-Ducar, P. ; Zaragoza Univ., Aragon ; de Mingo, J. ; Valdovinos, A.

This paper proposes an automatically-adjusted linearization method based on the well-known linearization technique LINC (Linear amplification using Nonlinear Components) applied to the base station transmitter. A correction method of the gain and phase imbalances between both amplifying branches in a LINC transmitter is proposed to reduce the adjacent channel interference. A simple architecture is designed to compensate the unmatching between both branches being the adjusting coefficients calculated by means of a genetic algorithm. Several nonidealities are included in the analysis to deal with a realistic model, such as quadrature modulator imbalances, reconstruction filters and quantization error.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:6 ,  Issue: 7 )

Date of Publication:

July 2007

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