Wireless ECG Monitor

Wireless ECG Monitoring System.

I have led a project to build a wireless ECG monitor back in 2010, where a hardware will collect and amplify the ECG signal from a patient and transmit the signal to a central computer wirelessly for storage and processing. I have taken the common mode noise as the reference in order to avoid signal fluctuation. The signal is primarily filtered using a high pass filter in the hardware. The analog signal is then converted into a digital signal considering the Nyquist criterion using ADC of a microcontroller, which further processed the digital data and transmitted it wirelessly through a RF transmitter chip. The synchronized receiver end receives the data and passes it to the central computer. The computer collects the data for certain period of time, filters it successively and displays it on screen. The computer also compresses the data using a novel technique as described below and stores it.

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Efficient algorithm for ECG data compression.

We have developed a novel technique for ECG signal compression. We have utilized the strong correlation between different cycles of the ECG signal from a particular person and used the discrete cosine transform (DCT) method for the data compression. The number of DCT coefficients are adaptively calculated in order to achieve a good compression ratio as well as a good percent root mean square difference. We have compared our technique with different techniques in the literature, using MIT-BIH database. Our method shows promising improvement in the compression ratio with lower distortion.

Related manuscript:

• E. M. A. Anas, M. I. Hossain, M. S. Afran and S. Sayed "Compression of ECG signals exploiting correlation between ECG” Proc. ICECE, IEEE, 622-625, December 2010. (Link).