Amplitude Ratio Measurement with Matlab
Amplitude ratio measurement between two signals via DFT.
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The present code is a Matlab function that provides a measurement of the amplitude ratio between two signals with one and the same shape (e.g., both signals are sine-waves). The main purpose is assisting the measurement of a frequency response of a two-port circuit. The amplitude ratio measurement is based on a Discrete Fourier Transform (DFT) of the signals and a Maximum Likelihood Estimation (MLE) of their amplitudes. The method is highly noise resistive.
Two examples are given in order to clarify the usage of the function. The input and output arguments are given in the beginning of the code.
The code is based on the theory described in:
[1] D. Rife, R. Boorstyn. Single-tone parameter estimation from discrete-time observations. IEEE Trans. Inform. Theory, Vol. IT–20, pp. 591-598, Sept. 1974.
Cite As
Hristo Zhivomirov (2026). Amplitude Ratio Measurement with Matlab (https://www.mathworks.com/matlabcentral/fileexchange/50559-amplitude-ratio-measurement-with-matlab), MATLAB Central File Exchange. Retrieved .
Acknowledgements
Inspired: Frequency Response Measurement with Matlab, Impedance Frequency Response Measurement with Matlab
General Information
- Version 1.5.0.0 (3.27 KB)
MATLAB Release Compatibility
- Compatible with any release
Platform Compatibility
- Windows
- macOS
- Linux
| Version | Published | Release Notes | Action |
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| 1.5.0.0 | A new version of the code has been uploaded. |
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| 1.4.0.0 | A new version of the code has been uploaded. |
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| 1.3.0.0 | A new version of the code has been uploaded. |
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| 1.2.0.0 | A new version of the code has been uploaded. |
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| 1.1.0.0 | A new version of the code has been uploaded. |
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| 1.0.0.0 |
