11 - 6.111 Final Project Presentation: Wireless EKG...

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6.111 Final Project Presentation: Wireless EKG Analyzer April 21 st , 2004 Team members: Vanessa Hsu Chen Derik Thomann
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Motivation ± Remote monitoring of vital signs in patients by wireless transmission of useful data ± Analog inputs of system are medical sensors: ² In our case, EKG: Electrocardiogram: electrical recording of the heart ² Another possibility, Digital Stethoscope: supervising of breathing patterns
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System Architecture
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Wireless transmission ± Transmits 10 bit EKG Data from 1 to 2, sampled using on board ADC ± Transmits Help signal (button) from 1 to 2 ± Transmits Acc signal (button) from 2 to 1 ± Outputs dataavail when data is ready, help when help signal is activated, and 10 bit data to FFT module
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FFT – Fast Fourier Transform ± Why? Signal in frequency domain - in order to do spectral analysis ± DFT – equally spaced samples of DTFT ± FFT – for powers of 2 number of samples where and W N are the roots of unity in the unit circle
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FFT – How it works ± Use divide and conquer ± For 2 points: ± For 4, pre-compute the pairs and add them
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This note was uploaded on 07/21/2009 for the course EECS 6.111 taught by Professor Prof.ananthachandrakasan during the Spring '04 term at MIT.

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11 - 6.111 Final Project Presentation: Wireless EKG...

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