Wolfram Demonstrations Project

13,000+ Open Interactive Demonstrations
Powered by Notebook Technology »

Power Efficiency of Amplitude Modulation

Initializing live version
Download to Desktop

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

This Demonstration illustrates the effect of changing the modulation factor (also called the modulation depth) on the power efficiency of ordinary amplitude modulation (AM) technique. A modulation factor greater than 1 results in envelope distortion, causing difficulties during demodulation. Hence must be kept less than 1.

[more]

At 100% modulation (, the power efficiency of AM is 33.33%, that is, the total power carried by the sidebands is 1/3 of the total power. The middle graph shows the modulated carrier , where is the message signal and is the modulation factor. For simplicity, the amplitude of the carrier signal and the amplitude of the message signal are both kept equal to 1.

[less]

Contributed by: Nasser M. Abbasi (March 2011)
Open content licensed under CC BY-NC-SA

Snapshots

Details

Embed Code

Take advantage of the Wolfram Notebook Emebedder for the recommended user experience.

Related Demonstrations More by Author
Browse all topics
Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.
Send