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Digital linearization for broadband multicarrier analog photonic link incorporating downconversion

机译:包含下变频的宽带多载波模拟光子链路的数字线性化

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摘要

The multicarrier analog photonic links suffer from both the traditional third-order intermodulation distortions (IMD3) and the cross-modulation distortions (XMDs), severely limiting the dynamic range of the links. This paper proposes and demonstrates an effective technique based on a single modulator and photodetector to simultaneously realize the downconversion and receiving of multiple radio frequency signals, as well as suppress the nonlinearities, including the IMD3 and XMD. In the scheme, the nonlinear compensation information is directly obtained from hardware then the distortion compensation is carried out in the digital domain. Experimental results show that the XMD and IMD3 distortions are suppressed with 36.6 and 25.8 dB, respectively, and the link dynamic range is improved by 25 dB, preventing the degradation of the dynamic range of the link. Moreover, the structure of our scheme can eliminate the stringent requirement for hardware.
机译:多载波模拟光子链路会同时遭受传统的三阶互调失真(IMD3)和交叉调制失真(XMD)的困扰,从而严重限制了链路的动态范围。本文提出并演示了一种有效的技术,该技术基于单个调制器和光电检测器,可以同时实现多个射频信号的下变频和接收,以及抑制包括IMD3和XMD在内的非线性。在该方案中,直接从硬件获得非线性补偿信息,然后在数字域中进行失真补偿。实验结果表明,XMD和IMD3失真分别抑制了36.6和25.8 dB,链路动态范围提高了25 dB,从而防止了链路动态范围的降低。而且,我们方案的结构可以消除对硬件的严格要求。

著录项

  • 来源
    《Optical engineering》 |2016年第3期|031102.1-031102.6|共6页
  • 作者单位

    Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China;

    Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China;

    Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China;

    Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China;

    The 54th Research Institute of CETC, Shijiazhuang, Hebei 050081, China,Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory, Shijiazhuang, Hebei 050081, China;

    Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China,Beijing University of Posts and Telecommunications, School of Science, Beijing 100876, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    digital postprocessing; multicarrier analog photonic link; downconversion; third-order intermodulation; cross-modulation distortion;

    机译:数字后处理;多载波模拟光子链路;下转换三阶互调交叉调制失真;

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