| 一种用于数字D类功放的伪自然采样算法 |
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| 引用本文： | 于泽琦,樊养余,史龙飞,吕国云.一种用于数字D类功放的伪自然采样算法[J].电子与信息学报,2014,36(3):758-762. |
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| 作者姓名： | 于泽琦 樊养余 史龙飞 吕国云 |
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| 作者单位： | 西北工业大学电子信息学院; |
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| 基金项目： | 陕西省科学技术研究发展计划(2012K06-10);华为公司创新研究计划(YJCB2011062RE)资助课题 |
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| 摘 要： | 该文针对均匀采样脉冲宽度调制(UPWM)型数字D类功放，提出了一种新的伪自然采样算法以校正其在开关信号调制时产生的谐波失真。该算法融合了三阶和一阶拉格朗日插值法，并结合伪自然采样点位置判断法而形成，可在计算复杂度较低的同时，达到较好的谐波失真校正效果。该文使用FPGA搭建了一个基于该算法以及其它同类算法的开关信号调制器测试系统。测试结果表明，相比同类算法，该算法基本消除了谐波失真且硬件消耗适中，显示了更大的优越性。
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| 关 键 词： | 数字D类功放 伪自然采样 谐波 拉格朗日插值 |
| 收稿时间： | 2013-05-21 |
A Pseudo Natural Sampling Algorithm for Digital Class D Power Amplifiers |
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| Yu Ze-Qi,Fan Yang-Yu,Shi Long-Fei,Lv Guo-Yun.A Pseudo Natural Sampling Algorithm for Digital Class D Power Amplifiers[J].Journal of Electronics & Information Technology,2014,36(3):758-762. |
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| Authors: | Yu Ze-Qi Fan Yang-Yu Shi Long-Fei Lv Guo-Yun |
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| Abstract: | A new pseudo natural sampling algorithm is proposed in this paper for correcting the harmonic distortion produced by switching signal modulation in Uniform sampled Pulse Width Modulation (UPWM) digital class D power amplifiers. This algorithm combines the 3th-order and 1st-order Lagrange interpolation methods and adopts a position judging method for pseudo natural sampling point to obtain an expected harmonic distortion correction effect and computation complexity. A switching signal modulator test system based on FPGA is built to test the proposed algorithm and other kindred algorithms. The test results show that the proposed algorithm basically eliminates the harmonic distortion with modest hardware consumption and is better than other kindred algorithms. |
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