Noise Supression Techniques of a Wireless Signal in Ecg
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NOISE SUPRESSION TECHNIQUES OF A WIRELESS SIGNAL IN ECG
Submitted by: Raggar Paggar Camm
Student Number: 13001070
Supervisor: Mr Cavric
Faculty of Engineering and Technology
Department of Electrical, Computer& Telecommunications Engineering
Project report For Final year presented to the Botswana International University
Of Science and Technology in partial fulfilment of the requirements of the degree of
Bachelor of Engineering
ABSTRACT
Of recent, too much attention has been diverted to the use of wireless technology to monitor heart activities of heart disease patients. This technology gives the patients free of movement, more mobility and more satisfaction. Some of the developments used in this technology includes many parts of the monitoring system such as electrodes, data acquisition systems, signal analysing and heart monitors with built-in global positioning systems. This feature provides the ability to determine the location of a patient when a heart attack happens.
Some of this technology is integrated with smart phones. This include wireless communication, high speed processors, web accessibility, big screen size and other features.
This advantages have motivated engineers and researchers to develop smart phones to work as a heart monitor. In this paper the integration of filtering circuits has been applied to aid in acquiring clear ECG signals for proper diagnosing of heart disease patients. The main idea is to build a an ECG signal amplifier that will provide adequate gain to the low frequency ECG signals for analysis without causing any distortions to the signal.
ABBREVIATIONS
ECG……………………………… ELECTROCARDIGRAM
WHM…………………………… WIRELESS HEALTH MONITOR
CMRR……………………………..COMMON MODE REJECTION
RF…………………………………. RADIO FREQUANCY
PDA………………………………… PERSONAL DIGITAL ASSISTANT
TABLE OF CONTENTS
ABSTRACT
ABBREVIATIONS
TABLE OF CONTENTS
LIST OF FIGURES
ACKNOWLEDGEMENTS
CHAPTER 1: INTRODUCTION
MOTIVATION
OBJECTIVES AND SCOPE
ORGANISATION OF THE REPORT
CHAPTER 2: BACKGROUND
2.1 THEORY
2.2 LITERATURE REVIEW
2.2.1 GENERAL DESIGN OF THE WIRELESS HEART MONITOR
ELECTRODES
ANALOG CONDITIONING CIRCUIT
ADC AND PRE-PROCESSING
THE WIRELESS COMMUNICATION
PROCESSING UNIT
ECG SIGNAL ANALYZING
REMOTE ECG MONITORING
CHAPTER 3: METHODOLOGY
3.1 SOLUTION APPROACH
3.2 EQUIPMENT
3.3 CIRCUIT DESIGN
3.3.1
INPUT STAGE
INSTRUMENTATION AMPLIFIER (INA126P)
3.3.2
FILTERING STAGE
HIGH PASS FILTER
LOW PASS FILTER
3.3.3
GAIN STAGE
3.3.4
SCHEMATIC OF THE CIRCUIT
CHAPTER 4 RESULTS AND DISCUSSION
CHAPTER 5 CONCLUSION
CHAPTER 6 FUTURE WORKS
Bibliography
LIST OF FIGURES
Figure 1: Normal ECG signal
Figure 2: The dry electrode
Figure 3; Non-contact electrode
Figure 4: Wireless ECG PDA
Figure 5: General structure of PDAs and mobile phones in a telemedicine network
Figure 6: ECG amplifier schematic
Figure 7: Instrumentation Amplifier Transient Response
Figure 8: ECG amplifier
ACKNOWLEDGEMENTS
I would to thank my supervisor for all the help and the support he gave me throughout the term of the project. I am grateful for the suggestions and corrections he made towards my project. I also like appreciate the emotional and physical support I got from my fellow classmates who also helped me when I encountered problems in my project