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Simulation of ASK, FSK, and PSK using MATLAB Simulink



Simulation of Amplitude Shift Keying (ASK) using MATLAB Simulink    

In Simulink, we pick different components/elements from MATLAB Simulink Library. Then we connect the components and perform a particular operation. 


Result


A sine wave source, a pulse generator, a product block, a mux, and a scope are shown in the diagram above. The pulse generator generates the '1' and '0' bit sequences. Sine wave sources produce a specific amplitude and frequency. The scope displays the modulated signal as well as the original bit sequence created by the pulse generator. Mux is a tool for displaying both modulated and unmodulated signals at the same time.

The result section shows that binary '1' is modulated by a certain sine wave amplitude of 1 Volt, and binary '0' is modulated by zero amplitude.


Simulation of Frequency Shift Keying (FSK) using MATLAB Simulink 


Result



The diagram above shows two sine wave sources, a pulse generator, a switch, a mux, and a scope. The pulse generator generates the '1' and '0' bit sequences. Two different frequencies are provided by sine wave sources.

The result section shows that binary '1' is modulated at a higher frequency than binary '0' and that binary '0' is modulated at a lower frequency.


Simulation of Phase Shift Keying (PSK) using MATLAB Simulink


Result


A sine wave source, a pulse generator, a switch, a product element, a constant, a mux, and a scope are all shown in the diagram above. The pulse generator generates the '1' and '0' bit sequences.

In the result section, binary '1' is modulated with a 180-degree shifted frequency, whereas binary '0' is modulated with the same 0-degree shifted frequency.

 

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[1] QPSK Modulation and Demodulation using MATLAB Simulink


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MATLAB code for MSK

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