Another detection scheme is called envelope detection consisting of a simple diode and a low pass filter ( a parallel connection of a resistor and capacitor).The low pass filter gets rid of the higher frequencies coming out of the diode and to allow the low frequency message signal to pass through the filter. The detection [...]

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My previous post talked about modulating the amplitude of the carrier to embed a message signal. The demo uses Simulink found in Matlab.

Here, I will show how we can recover our transmitted message using synchronous detection (coherent or homodyne detection). Synchronous detection does not waste any energy in the carrier when there is no message [...]

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Here is an example of using Matlab to demonstrate Amplitude Modulation.
The demo does not provide any mathematical background. However, you can visually see what the concept of amplitude modulation is all about.

There are two types of modulation scheme: Double sideband Suppressed Carrier AM (DSB-SC AM) and Double Sideband Large Carrier AM (DSB-LC AM).

To recover the [...]

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Here is a video I posted on YouTube to help you with the algebra homework. The topic is on the quadratic equation using flash animation.

Let me know what you would like to see in other topics you. Below are some other resources on the quadratic equation.
Deriving the Quadratic Formula from Completing the SquareOne such classic [...]

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