Comparison of look-up table minimization methods for real-time power amplifier simulation

Yan Zhang, Aarne Mämmelä

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

    2 Citations (Scopus)

    Abstract

    Look-up table (LUT) is one of the most popular methods for simulating the nonlinear characteristics of radio frequency (RF) power amplifiers. In this paper two practical methods for minimizing the LUT size are assessed for fast and flexible simulations using field programmable gate array (FPGA) circuits. They are cubicspline interpolation and segmented nonuniform table indexing methods. The implementation architectures for these two approaches were developed and implemented. In addition, a suitable evaluation criterion for this kind of new applications is proposed in this paper. Implementation complexity and goodness of curve reconstruction were both considered so that the evaluation process could be more accurate and complete. The numerical comparisons show that the reconstruction performance of the cubicspline interpolation method outperforms the nonuniform table indexing method dramatically by the sacrifice of a number of multipliers and double memory resources. The results also show that different segmentation schemes can considerably affect the performance of the segmented nonuniform indexing method.
    Original languageEnglish
    Title of host publicationIEEE Workshop on Signal Processing Systems Design and Implementation, 2005
    Pages629-634
    DOIs
    Publication statusPublished - 23 Jan 2006
    MoE publication typeA4 Article in a conference publication
    EventIEEE Workshop on Signal Processing Systems Design and Implementation, SiPS - Athens, Greece
    Duration: 2 Nov 20054 Nov 2005

    Workshop

    WorkshopIEEE Workshop on Signal Processing Systems Design and Implementation, SiPS
    Abbreviated titleSiPS
    CountryGreece
    CityAthens
    Period2/11/054/11/05

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    Keywords

    • Table lookup
    • Minimization methods
    • Radiofrequency amplifiers
    • Radio frequency
    • Flexible printed circuits
    • Circuit simulation
    • Indexing

    Cite this

    Zhang, Y., & Mämmelä, A. (2006). Comparison of look-up table minimization methods for real-time power amplifier simulation. In IEEE Workshop on Signal Processing Systems Design and Implementation, 2005 (pp. 629-634) https://doi.org/10.1109/SIPS.2005.1579942