One-step extraction of optimal normalisation gain for digital predistortion linearisation

One-step extraction of optimal normalisation gain for digital predistortion linearisation
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一步提取数字预失真线性化的最佳归一化增益

DOI:
10.1049/el.2014.4216
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发表时间:
2015-03
影响因子:
1.1
通讯作者:
Li Gang
Li Gang
中科院分区:
工程技术4区
文献类型:
--
作者:
Wang Haoyu;Liu Falin;Tao Wei;Li Gang

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事实证明,用来合成预失真函数的归一化增益的选择对线性化功率放大器的线性性能有很大的影响。提出了一种提取最优归一化增益的一步法。该方法直接从物理逻辑中导出,以保持预失真函数增益的一致性。因此,与传统方法中的扫描策略相比,该方法的复杂度要低得多,并且易于实现。实验测试表明,该方法的线性度性能与最优归一化增益相当,且性能优于其他已发表的方法。
It has been proved that the choice of normalisation gain, which is used to synthesise the predistortion function, has significant influence on the linearity performance of linearised power amplifiers. A one-step method is proposed to extract the optimal normalisation gain. The proposed method is directly derived from physical logics to keep the gain of predistortion function unity. Thus, it has much lower complexity compared to the scanning strategy in the conventional method and has easy implementation. A experimental test shows that the linearity performance of the proposed method is comparable to the optimal normalisation gain and also outperforms other published ones.
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