Spectral Analysis Techniques

Introduction

Get an overview of the course.

Lessons:

Course Overview

Learning Outcomes and Prerequisites

Course Example

Generate Healthy Fan Signals

Discrete Fourier Transform

Estimate the power spectrum of signals with different frequency components using discrete Fourier transform.

Lessons:

Fourier Transform

Fast Fourier Transform

Periodogram

Estimate the power spectral density of signals using the periodogram.

Lessons:

Is FFT enough?

Calculate the Periodogram

Improve the Frequency Resolution of Spectrum

Improve the frequency resolution of the signal spectrum by extending the signal length.

Lessons:

Find Frequency Spikes

Number of DFT Points

Improve Precision

Manage Spectral Leakage

Multiply a signal segment with a window function to mitigate spectral leakage and edge effects.

Lessons:

Windowing

Create and Apply Windows

Compare Different Windows

Resolve Tiny Tones

Resolve Closely Spaced Tones

Welch's Method

Improve power spectrum results for noisy signals.

Lessons:

Spectral Analysis Techniques for Noisy Signals

Spectrum of Noisy Signals

Welch's Method

Decrease Window Length

Downsides of Welch's Method

Increase Overlap

Parametric and Subspace Methods

Estimate the power spectral density for signals with short durations.

Lessons:

Frequencies in Short Signals

Parametric Methods

Subspace Methods

Conclusion

Learn next steps and give feedback on the course.

Lessons:

Summary

Next Steps

Course Survey

Course modules

Introduction

Discrete Fourier Transform

Periodogram

Improve the Frequency Resolution of Spectrum

Manage Spectral Leakage

Welch's Method

Parametric and Subspace Methods

Conclusion

Language

Hands-on exercises with automated feedback
Access to MATLAB through your web browser
Shareable progress report and course certificate

Signal Processing Onramp

Spectral Analysis Techniques

Course modules

Introduction

Discrete Fourier Transform

Periodogram

Improve the Frequency Resolution of Spectrum

Manage Spectral Leakage

Welch's Method

Parametric and Subspace Methods

Conclusion

Language

Hands-on exercises with automated feedbackAccess to MATLAB through your web browserShareable progress report and course certificate

Signal Processing Onramp

Hands-on exercises with automated feedback
Access to MATLAB through your web browser
Shareable progress report and course certificate