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首页> 外文期刊>Analog Integrated Circuits and Signal Processing >Accurate analysis of spectral regrowth of nonlinear power amplifier driven by cyclostationary modulated signals
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Accurate analysis of spectral regrowth of nonlinear power amplifier driven by cyclostationary modulated signals

机译：循环平稳调制信号驱动的非线性功率放大器频谱再生的精确分析

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摘要

In this paper we present an exact analytical expression to calculate the spectral regrowth at the output of a nonlinear power amplifier (PA) using the higher order cumulants and Poisson summation formula. This PA is driven by the filtered digitally modulated signals. To improve the accuracy of the calculations, the cyclosationarity of the input signal is considered. Moreover, closed-form expressions for the 1-dB compression and saturation points are extracted as a function of the PA model parameters, higher order statistics of the input signal, and the transfer function of the pulse shaping filter. In addition, an analytical expression for the adjacent channel power (ACP) and a closed-form expression of the ACP ratio are derived. This is followed by investigation of the effect of the PA nonlinearity on the performance of receiver. Simulation studies are carried out to verify the accuracy of the derived expressions. Excellent agreement between the analytical and simulation results is achieved.
机译：在本文中，我们提供了一个精确的解析表达式，可以使用高阶累积量和泊松求和公式来计算非线性功率放大器（PA）输出处的频谱再生长。该PA由滤波后的数字调制信号驱动。为了提高计算的准确性，考虑了输入信号的环化性。此外，还根据PA模型参数，输入信号的高阶统计量以及脉冲整形滤波器的传递函数来提取1-dB压缩点和饱和点的闭式表达式。此外，还导出了邻道功率（ACP）的解析表达式和ACP比率的闭式表达式。接下来是研究PA非线性对接收机性能的影响。进行仿真研究以验证导出表达式的准确性。在分析和仿真结果之间实现了极好的一致性。

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