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Design space exploration and constrained multiobjective optimization for digital predistortion systems

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publication2016 IEEE 27th International Conference on Application-specific Systems, Architectures and Processors (ASAP)
Pages182-185
Number of pages4
ISBN (Electronic)978-1-5090-1503-0
DOIs
Publication statusPublished - 1 Dec 2016
Publication typeA4 Article in a conference publication
EventINTERNATIONAL CONFERENCE ON APPLICATION-SPECIFIC SYSTEMS, ARCHITECTURES AND PROCESSORS -
Duration: 1 Jan 1900 → …

Publication series

Name
ISSN (Electronic)2160-052X

Conference

ConferenceINTERNATIONAL CONFERENCE ON APPLICATION-SPECIFIC SYSTEMS, ARCHITECTURES AND PROCESSORS
Period1/01/00 → …

Abstract

In this paper, we develop new models and methods for exploring multidimensional design spaces associated with digital predistortion (DPD) systems. DPD systems are important components for power amplifier linearization in wireless communication transceivers. In contrast to conventional DPD implementation methods, which are focused on optimizing a single objective — most commonly, the adjacent channel power ratio (ACPR) — without systematically taking into account other relevant metrics, we consider DPD system implementation in a multiobjective optimization context. In our targeted multiobjective context, trade-offs among power consumption and multiple DPD performance metrics are jointly optimized subject to performance constraints imposed by the given modulation scheme. Through synthesis and simulation results, we demonstrate that DPD systems derived through our design space exploration techniques exhibit significantly improved trade-offs among multidimensional implementation criteria, including energy consumption, ACPR, and symbol error-rate. Additionally, we perform experiments using three different LTE modulation schemes, and we demonstrate that our multiobjective optimization approach significantly enhances system adaptivity in response to changes in the employed modulation scheme.

Keywords

  • Estimation, Finite impulse response filters, Measurement, Modulation, Optimization, Power demand, Space exploration

Publication forum classification

Field of science, Statistics Finland