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| 核磁共振信号工频谐波的自适应滤除方法 | |
| 引用本文： | 田宝凤,段清明.核磁共振信号工频谐波的自适应滤除方法[J].吉林大学学报(信息科学版),2009,27(3):223. |
| 作者姓名： | 田宝凤 段清明 |
| 作者单位： | 吉林大学a. 仪器科学与电气工程学院;b.地球信息探测仪器教育部重点实验 室,长春 130061 |
| 基金项目： | 教育部科学技术研究重点项目，吉林省科技支撑计划 |
| 摘 要： | 针对核磁共振测量信号中的噪声，尤其是拉摩尔频率附近的工频谐波噪声干扰问题， 采用自适应滤波的方法进行噪声滤除,在自适应滤波去噪基本原理的基础上，对自 适应陷波滤波器的性能进行了仿真研究，并将该方法应用到实际采集到的核磁共振信号工频 谐波干扰的滤除中。研究结果表明，相对于传统的设计陷波滤波器去噪的方法，自适应陷波 器可自动跟踪干扰频率和相角，滤波后信号的失真小，通过包络拟合后,信号振幅和弛 豫时间的误差精度较高，可控制在5%以内，从而实现了工频谐波干扰的有效滤除。 |
| 关 键 词： | 核磁共振 干扰滤除 自适应滤波 工频谐波 |
Removal Method of Industrial Frequency Harmonics in Nuclear Magnetic Resonance Signal Based on Adaptive Filter |
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| TIAN Bao-feng,DUAN Qing-ming.Removal Method of Industrial Frequency Harmonics in Nuclear Magnetic Resonance Signal Based on Adaptive Filter[J].Journal of Jilin University:Information Sci Ed,2009,27(3):223. | |
| Authors: | TIAN Bao-feng DUAN Qing-ming |
| Institution: | a.College of Instrumentation and Electrical Engineering;b.Key Laboratory of Ge o Exploration and Instrumentation of Education Ministry,Jilin University,Changc hun 130061, |
| Abstract: | To remove the noise interference in NMR(Nuclear Magnetic Resonance) signal,especially the industrial frequency harmonics noise interference near larmor frequency,the noise removal method based on adaptive filter was researched.Based on introducing the basic principles of adaptive noise filtering,the simulation performance of adaptive notch filter was studied.And the method was applied to removing the industrial frequency harmonics noise interference of the actual NMR signal.The study shows that compared wit... |
| Keywords: | nuclear magnetic resonance(NMR) interference elimination adaptive filter industrial frequency harmonics |
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