互补型自适应滤波器在心磁信号处理中的应用  

Applications of improved complementary pair adaptive noise cancellation to MCG analysis

作　　者：赵莉[1] 陈赓华[1] 张利华[1] 黄旭光[1] 翟光杰[1] 李俊文[1] 汤玉林[1] 冯稷[1] 

机构地区：[1]中国科学院物理研究所

出　　处：《物理学报》2004年第12期4420-4427,共8页Acta Physica Sinica

基　　金：中国科学院知识创新工程 (批准号 :KJCX2 W4)资助的课题~~

摘　　要：将心磁信号从干扰噪声中加以提取并有效地消除噪声干扰是心磁信号处理中尤为重要的环节 .从改进算法的角度出发 ,提出互补型自适应滤波器结构以实现心磁信号的消噪处理 .该滤波器针对心磁这类非平稳信号进行设计 ,有效地解决了常规自适应滤波器应用于心磁信号处理时收敛速度和稳态误差的矛盾 .通过仿真实验和心磁实验结果表明 ,该算法能有效地消除心磁信号的背景噪声和工频干扰噪声 .How to extract the magnetocardiography (MCG) signals from the background noises and attenuate the noise is the key element of MCG signal processing. From the aspect of software technique,a new adaptive algorithm is proposed to suppress the environmental magnetic noise of MCG in this paper. The proposed algorithm is called improved complementary pair normalized least mean square algorithm. This adaptive structure is designed for MCG. This new algorithm provides the faster convergence speed and smaller steady-state error. In order to test the performance of this algorithm,the result of the simulated experiment and real MCG signal is analyzed. This method bring about the effective noise attenuation. Meanwhile,this algorithm is suitable for noise cancellation of other non-stationary signals.

关 键 词：磁信号 自适应滤波器 干扰噪声 非平稳信号 消噪处理 噪声干扰 背景噪声 法能 实验结果 消除 

分 类 号：R540.4[医药卫生—心血管疾病]