广义改进型Hammerstein预失真器的实现方法及验证

发布时间：2018-07-10 00:51

本文选题：广义改进型Hammerstein(GAH)预失真器 + 数字预失真　；参考：《微波学报》2017年01期

【摘要】：射频功率放大器与生俱来的非线性是无线通信前端设计需要解决的核心问题之一。根据广义改进型Hammerstein功率放大器非线性模型,提出一种应用于射频功放线性化的新型数字预失真器——广义改进型Hammerstein(Generalized Augmented Hammerstein,GAH)预失真器,并给出了该预失真器的实现方法。另外,为了精确分析GAH预失真器的性能,采用实际功放的输入输出数据进行仿真和实验。被测功放为中心频率1960 MHz,带宽40 MHz,输出功率45 d Bm的Doherty功放。仿真和实验证明:提出的数字预失真器不仅计算复杂度远低于记忆多项式(Memory Polynomial,MP)和分数阶记忆多项式(Fractional Memory Polynomial,FMP)预失真器,而且其线性化能力也强于AH、MP及FMP等预失真器。
[Abstract]:The inherent nonlinearity of RF power amplifier is one of the core problems in wireless communication front-end design. Based on the nonlinear model of generalized modified Hammerstein power amplifier, a novel digital predistorter, generalized Augmented Hammerstein (generalized Augmented Hammerstein predistortor), is proposed for linearization of RF power amplifier. The implementation method of the predistorter is given. In addition, in order to accurately analyze the performance of GAH predistorter, the input and output data of practical power amplifier are simulated and experimented. The measured power amplifier is a Doherty amplifier with a central frequency of 1960 MHz, a bandwidth of 40 MHz and an output power of 45 dBm. Simulation and experiments show that the proposed digital predistorter is much less complex than the memory polynomial (MP) and fractional memory polynomial (FMP) predistortors, and its linearization ability is better than that of AHMP and FMP predistortors.
【作者单位】：宁波大学信息科学与工程学院;
【基金】：国家自然科学基金重点项目(61631012);国家自然科学基金(61501272,61571251) 浙江省公益项目(2015C34004) 宁波市自然科学基金(2016A610064,2015A610116) 浙江省信息与通信工程重中之重学科开放基金(XKXl1513)
【分类号】：TN722.75

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