Evolutionary Multiobjective Optimization for Adaptive Dataflow-based Digital Predistortion Architectures

Li, Lin and Ghazi, Amanullah and Boutellier, Jani and Anttila, Lauri and Valkama, Mikko and S. Bhattacharyya, Shuvra (2017) Evolutionary Multiobjective Optimization for Adaptive Dataflow-based Digital Predistortion Architectures. EAI Endorsed Transactions on Cognitive Communications, 3 (10): e3. ISSN 2313-4534

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Abstract

In wireless communication systems, high-power transmitters suffer from nonlinearities due to power amplifier (PA) characteristics, I/Q imbalance, and local oscillator (LO) leakage. Digital Predistortion (DPD) is an effective technique to counteract these impairments. To help maximize agility in cognitive radio systems, it is important to investigate dynamically reconfigurable DPD systems that are adaptive to changes in the employed modulation schemes and operational constraints. To help maximize effectiveness, such reconfiguration should be performed based on multidimensional operational criteria. With this motivation, we develop in this paper a novel evolutionary algorithm framework for multiobjective optimization of DPD systems. We demonstrate our framework by applying it to develop an adaptive DPD architecture, called the adaptive, dataflow-based DPD architecture (ADDA), where Pareto-optimized DPD parameters are derived subject to multidimensional constraints to support efficient predistortion across time-varying operational requirements and modulation schemes. Through extensive simulation results, we demonstrate the effectiveness of our proposed multiobjective optimization framework in deriving efficient DPD configurations for run-time adaptation.

Item Type: Article
Uncontrolled Keywords: Digital predistortion, multiobjective optimization, evolutionary algorithms
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
QA75 Electronic computers. Computer science
Depositing User: EAI Editor II.
Date Deposited: 11 Sep 2020 09:11
Last Modified: 11 Sep 2020 09:11
URI: https://eprints.eudl.eu/id/eprint/236

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