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Low-complexity blind in-phase/quadrature imbalance compensation and field-programmable gate array realization for coherent receivers

机译:用于相干接收机的低复杂度同相/正交失衡补偿和现场可编程门阵列实现

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摘要

Receiver in-phase/quadrature (I/Q) imbalance caused by imperfect analog receiver front end can rapidly degrade system performance in a coherent optical transmission system. These imbalances, including I/Q gain and phase imbalance, become increasingly important when higher symbol rate, higher modulation order, and low roll-off pulse shape are used. Here, a low-complexity blind equalization algorithm, cascaded phase, and gain imbalance equalizers, is designed to mitigate these interferences. Furthermore, a field-programmable gate array hardware realization with 128-parallel processing units is performed to demonstrate the proposed algorithm in a 32-GBaud 16-quadrature amplitude modulation off-line transmission experiment. Based on the obtained results, the proposed blind I/Q imbalance compensation algorithm can provide very good compensation performance with low logic element consumption, which is more suitable for high order and high baud rate transmission system.
机译:不完善的模拟接收机前端导致的接收机同相/正交(I / Q)不平衡会迅速降低相干光传输系统中的系统性能。当使用较高的符号率,较高的调制阶数和较低的滚降脉冲形状时,包括I / Q增益和相位不平衡在内的这些不平衡变得越来越重要。这里,设计了一种低复杂度的盲均衡算法,级联相位和增益不平衡均衡器,以减轻这些干扰。此外,执行了具有128个并行处理单元的现场可编程门阵列硬件实现,以在32 GBaud,16正交幅度调制离线传输实验中演示该算法。基于获得的结果,提出的盲I / Q不平衡补偿算法可以提供很好的补偿性能,逻辑元件消耗低,更适合于高阶高波特率传输系统。

著录项

  • 来源
    《Optical engineering》 |2018年第11期|116101.1-116101.5|共5页
  • 作者单位

    Qingdao University, College of Electronic Information, Qingdao, China;

    Qingdao University, College of Electronic Information, Qingdao, China;

    Qingdao University, College of Electronic Information, Qingdao, China;

    Qingdao University, College of Electronic Information, Qingdao, China;

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

    Beijing University of Posts and Telecommunications, State Key Lab of Information Photonics and Optical Communications, Beijing, 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

    in-phase/quadrature imbalance; field-programmable gate array hardware realization; coherent receiver; blind equalization; low-complexity;

    机译:同相/正交不平衡;现场可编程门阵列的硬件实现;相干接收机盲目均衡低复杂度;

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