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首页> 外文会议>75th ARFTG Microwave Measurements Conference >Measurement and correction of residual nonlinearities in a digitally predistorted power amplifier
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Measurement and correction of residual nonlinearities in a digitally predistorted power amplifier

机译：数字预失真功率放大器中残余非线性的测量和校正

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摘要

A reduced cost method for the measurement and correction of residual nonlinearities in a digitally predistorted transmitter is proposed. The original system [1] uses a calibration signal applied off-line and a cancellation loop with a square law detector to measure residual nonlinearities. The approach is improved by replacing the calibration signal with the actual signal transmitted, resulting in an on-line measurement system. A further extension integrates several measurements over the input envelope range to adapt a fourth-order polynomial predistorter. Simulation results for a WCDMA input with a 101 carrier configuration show that the proposed approach for measuring residual nonlinearities and estimating predistortion coefficients is effective.
机译：提出了一种用于数字预失真发射机中残余非线性的测量和校正的低成本方法。原始系统[1]使用离线施加的校准信号和带有平方律检测器的消除环路来测量残留非线性。通过将校准信号替换为实际发送的信号来改进该方法，从而形成在线测量系统。进一步的扩展集成了输入包络范围内的多个测量值，以适应四阶多项式预失真器。具有101载波配置的WCDMA输入的仿真结果表明，所提出的用于测量残余非线性和估计预失真系数的方法是有效的。

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