| 大动态宽带干涉式雷电测向接收机新技术 |
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| 引用本文： | 彭亮,马洪,张辉.大动态宽带干涉式雷电测向接收机新技术[J].武汉大学学报(信息科学版),2011,36(11):1358-1362,1380. |
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| 作者姓名： | 彭亮 马洪 张辉 |
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| 作者单位： | 华中科技大学电子与信息工程系,武汉市珞喻路1037号430074／武汉光电国家实验室（筹）,武汉市珞喻路1037号430074 |
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| 基金项目： | 国家科技支撑计划重点资助项目(2008BAC36B02); 国家自然科学基金资助项目(10975056); 武汉光电国家实验室(筹)创新基金重点资助项目(Z080005) |
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| 摘 要： | 提出了一种基于非线性盲辨识的自适应数字接收机技术。由于宽带雷电信号的时频特征未知或时变,在频域对宽带数字接收机输出信号中的谐波与互调分量进行识别和分选,并以其短时能量最小化作为其非线性行为模型参数的盲辨识准则,利用最速下降算法实现模型参数的自适应提取和更新,然后在线实时地对接收机输出信号进行非线性补偿。实验结果表明,该盲辨识数字接收技术可以将整机的无杂散失真动态范围（SFDR）提高近20dB,极有利于在强干扰存在时对微弱信号的接收与检测。
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| 关 键 词： | 宽带干涉仪 数字接收机 非线性 盲辨识准则 无杂散失真动态范围 |
Large Dynamic Range Wideband Interferometer Receiver for Lightning Detection |
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| PENG Liang, MA Hong, ZHANG Hui.Large Dynamic Range Wideband Interferometer Receiver for Lightning Detection[J].Geomatics and Information Science of Wuhan University,2011,36(11):1358-1362,1380. |
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| Authors: | PENG Liang MA Hong ZHANG Hui |
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| Institution: | PENG Liang1,2 MA Hong1,2 ZHANG Hui1,2(1 Department of Electronics and Information Engineering,Huazhong University of Science and Technology,1037 Luoyu Road,Wuhan 430074,China)(2 Wuhan National Laboratory for Optoelectronics,China) |
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| Abstract: | A blind nonlinear identification based adaptive software radio receiver architecture is proposed and validated.Since the time-frequency domain characteristics of the lightning signal being unknown or time-varying,the harmonic and inter-modulation components in the output signal of the wideband digital receiver are automatically identified and extracted in the frequency domain,then a blind identification criterion for minimizing the short-time energy is designed.The steepest descent method is applied to iter... |
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| Keywords: | wideband interferometer digital receiver nonlinearity blind identification criterion SFDR |
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