Amplitude modulated sine wave matlab tutorial pdf

Amplitude modulation am is a one of the conventional technique used to transmit message signals using a carrier wave. Matlab code for amplitude modulation am file exchange. A technical tutorial on digital signal synthesis analog devices. This matlab function modulates the real message signal x with a carrier. Generate a 10 hz sinusoidal signal sampled at a rate of 200 hz for 1 second. Amplitude modulation am is a modulation technique where the. Sinewave creates a sine wave object that generates a realvalued sinusoid with an amplitude of 1, a frequency of 100 hz, and a phase offset of 0. The amplitude or the strength of a high frequency carrier wave is changed in accordance with the amplitude of message signal. The plotting of am signal using matlab is very easy. Amplitude modulation matlab tutorial amplitude modulation in. The code for amplitude modulation am with control of modulation index ma has been developed using matlab according to conventional theory. The process and the signal were called amplitude modulation, or am for short. The percent modulation can be varied simply by changing the amplitude of the 30 khz carrier signal. Examples functions and other reference release notes pdf documentation.

Simulink implementation of amplitude modulation technique. The modulating signal contains the intended message or information sometimes consisting of audio data, as in am radio. Am is widely used in electronic communication field. Set channel b to be a 29khz sine wave, amplitude 1v, phase 90deg, destination out1 set channel c to be a 31khz sine wave, amplitude 1v, phase 270deg, destination out1 at this point, you should have a 100 % amplitude modulated signal. Generate discrete sine wave matlab mathworks nordic. In the context of radio communication, near the end of the 2oth century, few modulated signals contain a significant component at carrier frequency. For example to plot the value of the sine function from zero to 2. Procedure amplitude modulation once the circuit is built to the lab manuals. Singlesideband amplitude modulate the signal with a carrier frequency of 50 hz. The basic theory and equations behind amplitude modulation are relatively straightforward and can be handled using straightforward trigonometric calculations and manipulation. Apply baseband modulation to a sine wave input signal and plot its response.

Run the command by entering it in the matlab command window. Sine wave changing amplitude matlab answers matlab. You can see that the frequency of the modulated signal changes with the amplitude of the input signal. The amplitude array is changing according to 2 ways in my demo. Rating is available when the video has been rented. The radio wave was called a carrier, since it was seen to carry the speech information with it. Read, download and publish amplitude modulation magazines, ebooks for free at. This matlab function returns an amplitude modulated am signal y, given the input. Amplitude modulation am is a one of the conventional modulation technique to transmit. Amplitude modulation is the process in which amplitude. Set g so that the sinewave peaks just fall to zero. If you are new to matlab, please go through our tutorials. Amplitude modulation early radio ee 442 spring semester.

For example fout 5 fin a divide by n10, 2 network is needed as. Amplitude modulation in simulink matlab simulation tutorial 2017. Simulink implementation of amplitude modulation technique using. Lab 4 eel 3552 amplitude modulation with matlab simulations. Read, download and publish amplitude modulation magazines. Amplitude modulation am is a one of the conventional modulation technique to transmit signals using a carrier wave.