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用于心电信号滤波的LMS自适应噪声对消器设计,胎儿信号包含母亲信号噪声,采用自适应算法将母亲信号对消掉,得到胎儿心电信号。-ECG filtering for LMS adaptive noise cancellation design, the fetus signals the mother signal contains noise, the use of adaptive algorithm will signal to eliminate the mother, the fetal E
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关于心电信号的仿真模型,包括滤波、平滑等信号处理-On the ECG of the simulation model, including filtering, smoothing and other signal processing
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用于信号滤波,要事先给出滤波器系数,给出心电加上正弦干扰信号的滤波过程。-For signal filtering, to filter coefficients is given in advance, given ECG+ sinusoidal interference signal filtering process.
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A few examples of designing and implementing fir filters with Matlab-filtering a signal taken from the mic input of the soundcard and putting it on the headphones output chanel and removing noise from ECG.I m uploading this file just because I need t
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1. 用双线性变换法设计一个巴特沃斯低通IIR数字滤波器。设计指标参数为:在通带内频率低于0.2π时,最大衰减小于1dB;在阻带内[0.3π, π]频率区间上,最小衰减大于15dB.
2.0.02π为采样间隔,打印出数字滤波器在频率区间[0, π/2]上的频率响应特性曲线。
3. 用所设计的滤波器对实际心电图信号采样序列进行仿真滤波处理,观察总结滤波作用与效果
附:心电图采样序列x(n)
人体心电图信号在测量过程中往往受到工业高频干扰,所以必须经过低通滤波处理后,才能作为判断心脏
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在MATLAB用滤波器对采集到的心电图信号进行滤波,并用图像显示滤波前后的心电图波形,及滤波器波形,-Collected with a filter in MATLAB to the ECG signal is filtered, and before and after filtering with the image display ECG waveforms and wave filters
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本次实验是要我们先产生心电信号,再加噪声再滤波。由一个心电信号数据表输出心电信号,由于已知的心电信号有噪声,所以我先将信号进行滤波,得到正确的心电信号。再加噪声,通过滤波可以得到高频和中频噪声,将原信号加上噪声显示再滤波。每次的时域信号都画出了他们相应的频谱,便于观察。每次的滤波我也尝试了不同的滤波器。-This experiment is to produce our first ECG, together with noise and then filtering. ECG data fro
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ECG signal processing
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已经下载好的书籍,经过设计相关滤波器实现心电信号滤波-Download the good books has been designed correlation filter the ECG signal filtering
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心电信号处理,心电信号加白噪声,低通滤波,频域分析及显示-ECG signal processing, filtering, frequency domain analysis and display
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采用双线性变换法实现IIR滤波器 并且用用所设计的滤波器对实际心电图信号采样序列进行仿真滤波处理-IIR filters using the bilinear transformation method and the sampling sequence of the designed filter on the actual ECG signal simulation filtering
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Several signed LMS based adaptive filters, which are computationally
superior having multiplier free weight update loops are proposed for noise
cancellation in the ECG signal. The adaptive filters
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心电信号R波检测的函数,包括降采样,滤波,希尔伯特包络提取三个预处理步骤。其中R波根据阈值检测,相对不应期要根据具体信号适当调整.-ECG R-wave detection functions, including down-sampling , filtering, Hilbert envelope extracted three pretreatment steps. Wherein R wave detection based on a threshold , the relative r
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以软件为主的方法实现QRS波的检测滤波之后的信号一般经过一些
变换以提高QRS波的份量,进而采用一系列阈值进行判别,这些阈值有固定
阈值法,也有可变阈值法。前者由于可能的干扰或高P、高T波的存在,若
其滤波后超过其阈值便会产生假阳性(FP,falsepositive)结果;另外,当心
律失常或QRS波幅度变小,阈值设置过高,会导致漏检产生假阴性(FN,
falsenegative)结果。由于固定阈值的这些缺点,有研究者提出了用可变阈
值检测,以提高检测的精确率,所采用的可
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虚拟力的无线传感网络覆盖,对信号进行频谱分析及滤波,内含心电信号数据及运用MATLAB写的源代码。- Virtual power wireless sensor network coverage, The signal spectral analysis and filtering, ECG data and includes source code written in MATLAB.
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对于MIT网站上的心电信号进行滤波、QRS波群查找,(For the MIT site of the ECG signal filtering, QRS wave group search,)
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MIT-ECG基线信号滤波算法,有效抑制基线漂移(MIT-ECG baseline signal filtering algorithm, which effectively inhibits baseline drift)
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