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A novel method to represent ECG signals via predefined personalized signature and envelope functions

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4 Author(s)
Yarman, B.S. ; Dept. of Electron. Eng., Isik Univ., Istanbul, Turkey ; Gurkan, H. ; Guz, U. ; Aygun, B.

In this paper, a new method to model ECG signals by means of "Predefined Personalized Signature and Envelope Functions" is presented. ECG signals are somewhat unique to a person. Moreover, it presents quasi-stationary behavior. Therefore in this work, on a frame basis, personal ECG signals Xi(t) is modeled by the form of Xi(t)≈Ciφi(t) αi(t). In this model, φi(t) is defined as the Personalized Signature Function (PSF); αi(t) is referred to as Personalized Envelope Function (PEF) and Ci is called the Frame-Scaling Coefficient (FSC). It has been demonstrated that for each person, the sets Φ={φk(t)} and A={αr(t)} constitute a "Predefined Personalized Functional Bases or Banks (PPFB)" to describe any measured ECG signal. Almost optimum forms of (PPFB), namely {αr(t)}, {φk(t)} pairs are generated in the Least Mean Square (LMS) sense. Thus, ECG signal for each frame is described in terms of the two indices "R" and "K" of PPFB and the frame-scaling coefficient Ci. It has been shown that the new method of modeling provides significant data compression. Furthermore, once PPFB are stored on each communication node, transmission of ECG signals reduces to the transmission of indexes "R" and "K" of [αr(t), φk(t)] pairs and the coefficients Ci, which also result in considerable saving in the transmission band.

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Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE  (Volume:3 )

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