PPG Signal Analysis

An Introduction Using MATLAB®

Mohamed Elgendi

• Publisher: CRC Press
• Year: 2020
• Print ISBN:
  9780367608279
  9781138049710
• Edition: 1
• eBook ISBN:
  9780429831119
• Topic: Technology & Engineering
• Subtopic: Biotechnology in Medicine
• Index: Technology & Engineering

This book serves as a current resource for Photoplethysmogram (PPG) signal analysis using MATLAB®. This technology is critical in the evaluation of medical and diagnostic data utilized in mobile devices. Information and methodologies outlined in the text can be used to learn the empirical and experimental process (including data collection, data analysis, feature extractions, and more) from inception to conclusion. This book also discusses how introduced methodologies can be used and applied as tools that will teach the user how to validate, test, and simulate developed algorithms before implementing and deploying the algorithms on wearable, battery-driven, or point-of-care devices.

chapter 1

Math Foundations

This chapter gives an overview of matlab and its basic arithmetic operations and functions, as well as a short introduction to matrices and matrix manipulation. Note that the MATLAB codes and examples are presented in a different font, and each line is numbered as follows:

 1 >> x = [1 2 2 4 4 5 5]; 2 >> figure; 3 >> plot(x); 

1.1Learning Objectives

The learning objectives of this chapter are to:

• Learn basic MATLAB functions, such as addition and subtraction
• Learn how to store numbers, strings, and logical values as variables
• Learn how variables can be imported and exported

1.2Scalars

1.2.1Scalar Mathematical Operations

Scalar mathematical operations are applied on quantities that are fully described only by a magnitude (or a numerical value).

Addition ex1: Adding two positive numbers (5,2) is performed as follows:

 1 >> 5 + 2 2 3 ans = 4 7 

Note that the spacing between each number and operator does not matter. For example, multiple spaces between 5 and 2 in the addition process will still provide the correct answer:

 1 >> 5 + 2 2 3 ans = 4 7 

Addition ex2: Adding two negative numbers (−5,−2) is performed as follows:

 1 >> (–5) + (–2) 2 3 ans = 4 −7 

Note that if the parentheses are removed, the operation will still be calculated correctly:

 1 >> –5 + −2 2 3 an...

Table of contents

• Cover
• Half Title
• Title Page
• Copyright Page
• Dedication
• Table of Contents
• List of Figures and Tables
• Preface
• Acknowledgments
• The Author
• How to Use This Book?
• Chapter 1: Math Foundations
• Chapter 2: Photoplethysmogram Signals
• Chapter 3: Visualization of PPG Signals
• Chapter 4: Pre-processing of PPG Signals
• Chapter 5: Signal Quality Assessment
• Chapter 6: PPG Feature Extraction
• Chapter 7: A Generic Method for Event Detection
• Chapter 8: Feature Selection
• Chapter 9: Identifying Adverse Events
• Chapter 10: Application of PPG to Global Health
• Chapter 11: Available PPG Databases
• References
• Index