...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Japanese journal of applied physics >A two-dimensional partial response maximum likelihood detection scheme for misalignment compensation in holographic data storage systems
【24h】

A two-dimensional partial response maximum likelihood detection scheme for misalignment compensation in holographic data storage systems

机译：全息数据存储系统中未对准补偿的二维部分响应最大似然检测方案

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A two-dimensional (2D) partial response maximum likelihood (PRML) detection scheme for misalignment compensation for holographic data storage systems is proposed. In the proposed detection scheme, a misalignment estimator and a predetermined table are added to the conventional 2D PRML scheme to estimate and reflect the effect of misalignment in the vertical and horizontal directions, respectively. In the vertical detection, the misalignment estimator located behind the vertical 2D equalizer and one-dimensional PRML detector estimates the misalignment by the adaptive least-mean-square algorithm (LMS). To improve the estimation accuracy, the misalignment is estimated iteratively by modifying the vertical equalizer coefficients reflecting the estimated misalignment. By considering the estimated misalignment, the vertical 2D equalizer coefficients, horizontal 2D equalizer coefficients, and 2D partial response (PR) target are selected among the predetermined table. In the predetermined table, the vertical and horizontal 2D equalizer coefficients for various misalignments were previously computed on the basis of the misalignment and 2D PR target by the LMS. By employing the horizontal 2D equalizer coefficients and 2D PR target reflecting the misalignment in the horizontal detection, the effect of misalignment is effectively mitigated. Simulation results show that the proposed scheme has more than 3 dB gains than the conventional scheme in the 10% misalignment in the horizontal and vertical directions. (C) 2017 The Japan Society of Applied Physics
机译：提出了一种用于全息数据存储系统的失准补偿的二维（2D）部分响应最大似然（PRML）检测方案。在提出的检测方案中，将未对准估计器和预定表添加到常规的2D PRML方案中，以分别估计和反映未对准在垂直和水平方向上的影响。在垂直检测中，位于垂直2D均衡器和一维PRML检测器后面的失准估计器通过自适应最小均方算法（LMS）估计失准。为了提高估计精度，通过修改反映所估计的失准的垂直均衡器系数来迭代地估计失准。通过考虑估计的失准，在预定表中选择垂直2D均衡器系数，水平2D均衡器系数和2D部分响应（PR）目标。在预定表中，预先通过LMS基于失准和2D PR目标来计算用于各种失准的垂直和水平2D均衡器系数。通过采用水平2D均衡器系数和反映水平检测中的未对准的2D PR目标，有效地减轻了未对准的影响。仿真结果表明，该方案在水平和垂直方向上的失准率为10％时，比常规方案具有3 dB以上的增益。 （C）2017日本应用物理学会

著录项

  • 来源
    《Japanese journal of applied physics》 |2017年第9s期|09NA01.1-09NA01.4|共4页
  • 作者

    Kong Gyuyeol; Choi Sooyong;

  • 作者单位

    Yonsei Univ, Sch Elect & Elect Engn, Seoul 03722, South Korea;

    Yonsei Univ, Sch Elect & Elect Engn, Seoul 03722, South Korea;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号