DSB-SC DEMODULATION

داود: سلمان افراح االسم

-IT الثالثه: – المرحله

االتصاالت مختبر

Demodulation is done by multiplying

the DSB-SC signal with the carrier signal. For demodulation, the modulation oscillator's frequency and phase must be exactly the same as the demodulation oscillator's otherwise, distortion and/or attenuation will occur. DSB-SC can be demodulated if modulation index is less than unity.

Demodulation

Designing the DSB-SC demodulation

circuit with the matlab program requires to design the DSB-SC modulation circuit first, design DSB-SC demodulation circuit second, then connect the output of the modulator circuit to the input of the demodulator circuit.

Choose the components from the Simulink Library Browser as shown in the following figures:

DSB-SC Demodulation Circuit

DSB-SC modulation circuit using matlab

The input of the circuit

Message signal Carrier signal

The output of the circuit

DSB-SC modulated signal

DSB-SC demodulation circuit

I/O of the previous circuit

Input signal Output signal

Complete circuit

Another way to implement the DSB-SC modulation and demodulation circuit