| 滤除小循环阻抗容积波中的呼吸干扰 |
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| 引用本文： | 郭建平,胡耄祺,张其善.滤除小循环阻抗容积波中的呼吸干扰[J].北京生物医学工程,2002,21(1):33-35,53. |
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| 作者姓名： | 郭建平 胡耄祺 张其善 |
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| 作者单位： | 1. 北京航空航天大学电子工程系,北京,100083;2. 航天医学工程研究所,北京,100094 |
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| 摘 要： | 目的消除小循环阻抗容积波中呼吸干扰.方法分析各种状态的小循环阻抗容积波信号的频谱.利用椭圆函数滤波器较陡的过渡带特性设计前向和后向滤波器,消除由于IIR滤波器造成滤波后的数据相位非线性失真.结果滤波后的小循环阻抗信号与参照信号心电和心音之间时相同步,确保了结合参照信号的综合判断的正确性.结论解决了无须依赖参照信号对小循环阻抗信号中的呼吸干扰的消除问题.
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| 关 键 词： | 小循环阻抗容积波 谱分析 信号处理 零相移滤波器 |
| 文章编号： | 1002-3208(2002)01-0033-03 |
Filtering off Respiratory Interference from Lesser Circulation Impedance Wave |
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| GUO Jianping,HU Maoqi,ZHANG Qi- shan.Filtering off Respiratory Interference from Lesser Circulation Impedance Wave[J].Beijing Biomedical Engineering,2002,21(1):33-35,53. |
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| Authors: | GUO Jianping HU Maoqi ZHANG Qi- shan |
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| Institution: | GUO Jianping,HU Maoqi,ZHANG Qi- shan.1 Beijing University of Aeronautics and Astronautics,Beijing 100083 2 Institute of Space Medical Engineering,Beijing 100094 |
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| Abstract: | Objective To eliminate respiratory interference from lesser circulation impedance.Method Power spectra were calculated for breathless data and respiratory data. A back and forward filter with steeper transitional band was designed of ellipse function. It can remove nonlinear phase distortion caused by IIR filter. Result Time and phase are synchronous between filtered data and reference ECG, PCG signals.Conclusion It solved the problem of removing respiratory interference from lesser circulation impedance wave without referencirg to ECG and PCG. |
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| Keywords: | Lesser circulation impedance cardiography Spectra analysis Signal processing Filter with zoro phase shift |
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