A QRD-RLS-Based Predistortion Scheme for High-Power Amplifier Linearization |
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Authors: | Muruganathan SD Sesay AB |
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Affiliation: | TRLabs, Calgary, Alta.; |
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Abstract: | A digital baseband predistortion (PD) scheme for high-power amplifier (HPA) linearization is proposed and analyzed in this brief. The proposed approach utilizes the QR-decomposition-based recursive least squares (QRD-RLS) algorithm to estimate the memoryless complex polynomial coefficients that characterize the HPA. The inverse polynomial model coefficients corresponding to the PD are similarly extracted using QRD-RLS. The performance of the proposed PD scheme is analyzed via simulations and compared with previously published techniques. Results show that the QRD-RLS-based solution offers improved performance over its comparatives |
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