| 欠采样在基带预失真功率放大器线性化的应用 |
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| 引用本文： | 陈长伟,秦开宇. 欠采样在基带预失真功率放大器线性化的应用[J]. 电讯技术, 2010, 50(5): 47-50. DOI: 10.3969/j.issn.1001-893x.2010.05.010 |
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| 作者姓名： | 陈长伟 秦开宇 |
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| 作者单位： | 电子科技大学空天科学技术研究院,成都,610054;电子科技大学空天科学技术研究院,成都,610054 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 从理论证实了欠采样在基带预失真中的可行性,将欠采样用在基带预失真系统上,降低了功率放大器失真信号的采样率而完整地保留了信号中的非线性信息.最后,利用欠采样理论构建了基带预失真功率放大器系统,得到了19 dB三阶交调失真的改善,与正常采样下(5倍输入信号Nyquist采样率)的三阶交调失真的改善度相比相当,从而降低了系统的复杂度及成本.
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| 关 键 词： | 功率放大器 欠采样 基带预失真 三阶交调 |
Application of Undersampling Theorem in Baseband Predistortion Amplifier |
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| CHEN Chang-wei and QIN Kai-yu. Application of Undersampling Theorem in Baseband Predistortion Amplifier[J]. Telecommunication Engineering, 2010, 50(5): 47-50. DOI: 10.3969/j.issn.1001-893x.2010.05.010 |
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| Authors: | CHEN Chang-wei and QIN Kai-yu |
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| Affiliation: | Institute of Astronautics and Aeronautics, University of Electronic Science and Technology of China,Chengdu 610054,China;Institute of Astronautics and Aeronautics, University of Electronic Science and Technology of China,Chengdu 610054,China |
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| Abstract: | The feasibility of applying undersampling in baseband predistortion amplifier is analysed, and a new baseband predistortion structure is proposed to lower down the requirement of sampling rate in baseband predistortion while maintaining the whole nonlinear information of the output signal. A baseband predistortion power amplifier system is built with undersampling theorem. The test resul shows a 19dB reduction of distortion over broadband spectra which effect equals to normal Nyquist sample rate. The system complexity and cost is reduced. |
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| Keywords: | power amplifier undersampling baseband predistortion IMD3 |
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