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    Enhanced Power Efficiency of Mobile OFDM Radio using Pre-distortion and Post-compensation

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    Author
    Guo, Yuanbin; Cavallaro, Joseph R.
    Date
    2003-12-20
    Abstract
    High power efficiency is an important requirement in cellular transmitter radios. OFDM systems require very linear transmission because of high peak-to-average power-ratio (PAPR). However, linear power amplifiers (PA) have very low efficiency. To enhance the power efficiency, non-linear PAs are applied and even forced to work near the saturation point. This generates inevitably huge non-linear distortion and spectrum re-growth. In this paper we propose a novel scheme to enhance the power efficiency of the mobile OFDM radio using polynomial-based pre-distortion and post-compensation. We estimate both the non-linearity and inverse non-linearity of the RF transmitter modeled by a memory-less polynomial with Least Square Error (LSE) method. These parameters can then be used to either construct a closed-form pre-distorter or easily generate the post-compensation signal to cancel the non-linear distortion at the RF output.
    Description
    Conference Paper
    Citation
    Y. Guo and J. R. Cavallaro, "Enhanced Power Efficiency of Mobile OFDM Radio using Pre-distortion and Post-compensation," vol. 1, 2002.
    Published Version
    http://dx.doi.org/10.1109/VETECF.2002.1040335
    Keyword
    Power Efficiency; OFDM; non-lineariry; Power Efficiency; OFDM; More... non-lineariry Less...
    Type
    Conference paper
    Citable link to this page
    https://hdl.handle.net/1911/19923
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
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