| 187 | 5 | 35 |
| 下载次数 | 被引频次 | 阅读次数 |
传统非线性主分量分析(PCA)算法在提取胎儿心电信号(FECG)时,对信道参数变化的跟踪能力较差,为有效地跟踪信道参数的变化,快速提取胎儿心电信号,提出一种通过预测误差调整遗忘因子的非线性PCA算法.该算法具有收敛速度快,参数估计误差小的优点.仿真结果表明,该算法与传统算法相比,可以快速有效地抑制掉母亲心电信号(MECG)和各种噪声,提取更清晰的胎儿心电信号.
Abstract：The traditional nonlinear principle component analysis algorithm has bad tracking capability to the variable channel parameter.An improved nonlinear principle component analysis algorithm is proposed,which adjusts the variable forgetting factor by the estimated error.This algorithm has faster convergence and less parameter.The simulations show maternal electrocardiogram and noises can be more quickly and effectively restrained by the proposed algorithm in contrast with the traditional algorithm,and the effect of the extacted FECG is better.
[1]刘清欣,万红.基于快速固定点独立分量分析算法的胎儿心电信号分离[J].生物医学工程研究,2007,26(1):37-41.
[2]徐进.胎儿心电的提取方法分析[J].电子工程师,2006,32(6):77-80.
[3]Metin A,Eduard M.Examining fetal heart-rate variability using matching pursuits[J].IEEE Engineering in Medicineand Biology,1996,15(5):64-67.
[4]冶铁,吕运朋,王玉仓.自适应滤波器在胎动信号除噪中的应用[J].郑州大学学报:自然科学版,2001,33(4):53-55.
[5]张贤达,保铮.盲信号分离[J].电子学报,2001,29(12):1766-1770.
[6]Zhu Xiaolong,Zhang Xianda.Adaptive RLS algorithm for blind source separation without prewhitening[J].IEEETransactions on Circuits and System,2006,53(3):745-752.
[7]Weingessel A,Homik K.Local PCA algorithms[J].IEEE Trans Neural Networks,2000,11(6):1242-1250.
[8]李木森,毛剑琴.盲信号分离研究现状和展望[J].信息与电子工程,2003,1(1):69-78.
[9]Yang B.Projection approximation subspace tracking[J].IEEE Transactions on Signal Processing,1995,43(1):95-107.
[10]Park D J,Jun B E,Kim J H.Fast tracking RLS algorithm using novel variable forgetting factor with unity zone[J].Electronics Letters,1991,27(23):2150-2151.
[11]Boets J.Database for the identification of systems[EB/OL].[2008-02-22].Http://www.esat.kuleuven.ac.be/sista/dai-sy.
[12]Zhu Xiaolong,Zhang Xianda.Adaptive RLS algorithm for blind source separation using a natural gradient[J].IEEE Sig-nal Processing Letters,2002,9(12):432-435.
基本信息:
中图分类号:R318
引用信息:
[1]夏冰,刘亚雷,穆晓敏,等.一种改进的非线性PCA胎儿心电信号提取算法[J].郑州大学学报(理学版),2009,41(01):99-103.
2009-03-15
2009-03-15