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TDNLMS自适应预测器有限字长效应分析及其在设计中的应用 被引量：2

Analysis of Finite-precision Effect of TDNLMS Adaptive Predictor and its Application in Digital Filter Design
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摘要 为了使预测器在特定应用环境中的有限字长效应满足应用系统的性能要求 ,以小目标检测为应用背景 ,提出了理论和实验相结合的确定 TDNL MS(二维归一化最小均方误差 )自适应预测器运算字长的方法。同时分析了步长参数、输入数据字长、图像统计特性、预测器支撑区域等因素与 TDNL MS自适应预测器权值和迭代运算中间结果量化误差之间的联系 ,并通过实验对分析结果进行了验证。仿真结果表明 ,用该方法设计的有限精度预测器 ,其小目标检测性能与无限精度预测器十分接近。 The TDNLMS (two dimensional normalized least mean squared error) adaptive filter can be used as a pre whitening filter in small object detection application in digital image. The performance of the digital implementation of the adaptive filter is influenced by the finite precision effect. In this paper, the finite-precision effect of TDNLMS adaptive predictor used for small objects detection is analyzed, and a method of determining computation word length of the digital adaptive filter by experiments is presented. The relation between the word length of the adaptive predictor and the features of the environment, including the step size parameter, input data word length, statistic characteristic of image processed and the support region of the predictor, is discussed. Simulation results are consistent with the analysis. Through the method presented in this paper, a finite precision TDNLMS adaptive predictor is designed, and compared with an infinite precision predictor witch is implemented by double precision floating point numbers. Simulation results shown that the MSE (mean squared error) and the mean SNR (signal to noise ratio) gain produced by the finite precision TDNLMS adaptive predictor is very close to the infinite precision TDNLMS adaptive predictor.
作者 桑红石 张天序
机构地区 华中科技大学图像识别与人工智能研究所图像信息处理与智能控制教育部重点实验室
出处 《中国图象图形学报（A辑）》 CSCD 北大核心 2004年第9期1055-1061,共7页 Journal of Image and Graphics
基金 自然科学基金重大项目 (60 13 5 0 2 0 )
关键词 有限字长 TDNLMS 自适应预测器 小目标检测 有限精度 最小均方误差 统计特性 仿真结果 应用系统 权值 adaptive filter, finite precision effect, small object detection, two dimensional normalized least mean squared error(TDNLMS)
分类号 TB115 [理学—应用数学] TN911.73 [电子电信—通信与信息系统]
  • 相关文献

参考文献10

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二级参考文献11

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共引文献46

同被引文献17

  • 1Bang D,Tang H,Kamat S.Linear predictor using 3-D projection for video lossless compression [CT/IEEE International Symposium on Industria 1 Electronics(ISlE 2009) Seoul Olympic Parktel, Korea , 2009:1914-1918.
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  • 9夏良裕,程歆琦,刘茜,刘荔,秦绪珍,张麟,丁金文,徐二木,邱玲.临床实验室生化免疫项目自动审核程序的建立与应用[J].中华医学杂志,2017,97(8):616-621. 被引量：31
  • 10邓林强,陈益国,朱兴煌,李玥婷,王羡欠.临床微生物实验室菌(毒)种信息管理系统的开发与应用[J].现代预防医学,2017,44(14):2679-2683. 被引量：5

引证文献2

二级引证文献6

中国图象图形学报（A辑）
2004年 第9期

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