| 杨玉敏,郭崇慧,史振威,夏尊铨.具有时间结构的胎儿心电信号盲提取新算法[J].,2010,(1):137-140 |
| 具有时间结构的胎儿心电信号盲提取新算法 |
| A new algorithm for blind extraction of time-correlated fetal electrocardiogram signals |
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| DOI：10.7511/dllgxb201001025 |
| 中文关键词: 盲源分离 盲提取 胎儿心电 |
| 英文关键词: blind source separation blind extraction fetal electrocardiogram |
| 基金项目:国家自然科学基金资助项目(10571018;60605002;70871015). |
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| 摘要点击次数: 1098 |
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| 中文摘要: |
| 非侵入式胎儿心电信号提取是生物医学信号处理与分析中的一个非常重要的课题，相关算法很多，但均存在一定缺陷．结合信号的非高斯性和自相关性建立了优化问题的目标函数，并利用近似牛顿法推导出了一个新算法．与已有的梯度算法相比，由于不涉及迭代步长，非常容易实现信号的盲提取．仿真实验表明该算法能有效地提取清晰的胎儿心电信号,并且对于时间延迟的估计误差具有较高的鲁棒性． |
| 英文摘要: |
| Non-invasive fetal electrocardiogram (FECG) extraction is a vital issue in biomedical signal processing and analyses. Many algorithms have been proposed, but they all have some faults. An objective function is introduced combining the non-Gaussianity and the autocorrelations of the signal sources. A new algorithm is developed by using an approximative Newton method. Comparison results show that the algorithm is simpler to implement because it does not need any iterative step than the existing gradient algorithm.Simulations illustrate that the new algorithm extracts the clear FECG effectively and is very robust to the estimated error of time-delay. |
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