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.

Inactive Publication Date: 2010-09-22
付汀
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the channel quality of wireless body area network may change greatly, and the compressed ECG data needs to be transmitted in a variable wireless channel environment

Method used

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  • Electrocardiosignal transmission method in environment of multihop wireless body area network based on adaptive codebook
  • Electrocardiosignal transmission method in environment of multihop wireless body area network based on adaptive codebook
  • Electrocardiosignal transmission method in environment of multihop wireless body area network based on adaptive codebook

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Embodiment Construction

[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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Abstract

The invention provides an electrocardiosignal transmission method in a wireless body area network, which comprises following steps: (1) carrying out pretreatment on the electrocardiosignal; (2) detecting the electrocardiosignal; (3) extracting characteristic parameters and searching a codebook; and (4) carrying out channel control. The electrocardiosignal transmission method adopts high-pass and low-pass filtering to carry out pretreatment on the electrocardiosignal. A difference thresholding method and a wavelet analysis method are adopted respectively to carry out detection marking on a QRS wave group, a P wave and a T wave of the electrocardiosignal. Finally a fixed codebook and an adaptive codebook are searched, suitable code vectors are selected to make a minimum mean squared error for compounding the electrocardiosignal and the original electrocardiosignal the minimum, and the parameters such as code vector addresses, gain and the like are transmitted. The electrocardiosignal transmission method determines search of different orders of a Hermite function by channel control so as to fulfill the aim of source and channel combination control. The invention relates to the electrocardiosignal transmission method in the environment of the multihop wireless body area network based on the adaptive codebook.

Description

technical field [0001] The invention relates to a method in the technical field of wireless communication, in particular to a method for transmitting electrocardiographic signals in a wireless body area network. Background technique [0002] With the development of society, people's pace of life is accelerating, pressure is increasing, and various diseases occur frequently, among which various heart diseases are an important cause of endangering human health; at the same time, the aging trend of the population in developed countries is obvious, and heart disease is also an major health challenges. In order to better protect human health, the wireless body area network capable of real-time monitoring of the human body has become an important technical hotspot at present. Electrocardiogram monitoring is a main monitoring method in wireless body area network. The wireless transmission of ECG signals is an important problem to be solved for the wide application of WBAN. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W84/18A61B5/0472A61B5/366
Inventor 付汀
Owner 付汀
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