Electrocardiosignal transmission method in environment of multihop wireless body area network based on adaptive codebook
An adaptive codebook and wireless body area network technology, applied in wireless communication, applications, sensors, etc.
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[0013] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, and its overall flow chart please refer to figure 1 As shown, the specific steps are as follows:
[0014] Step 1, preprocessing the ECG signal.
[0015] In order to remove interference sources such as power frequency interference near 50Hz and its multiplier and baseline drift below 0.7Hz in the ECG signal, the collected ECG signal should be preprocessed. Here, the effect of a band-pass filter is achieved by using a low-pass filter and a high-pass filter in sequence. After that, the slope characteristic of the signal waveform is obtained through differential operation, and the square operation performs nonlinear amplification on the differentiated signal to highlight the high-frequency part, and finally moves the window to integrate. After this series of processing, the effect of noise reduction is guaranteed on the basis of undistorted waveform shape...
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