1. DSB-SC DEMODULATION
‫االسم‬:‫داود‬ ‫سلمان‬ ‫افراح‬
-IT ‫المرحله‬:‫الثالثه‬–
‫االتصاالت‬ ‫مختبر‬

2. 
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

3. 
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

4. 
DSB-SC modulation circuit using matlab

5. 
The input of the circuit
Message signal Carrier signal

6. 
The output of the circuit
DSB-SC modulated signal

7. 
DSB-SC demodulation circuit

8. 
I/O of the previous circuit
Input signal Output signal

9. 
Complete circuit

10. 
Another way to implement the DSB-SC
modulation and demodulation circuit