No.
Subject
DSB-LC
1
2
Transmission
Power
3
4
Modulation
Demodulation
Carrier with sidebands
Consumes the half power
in transmit the carrier
Easy & Simple
Easy & Simple
5
6
7
Bandwidth
Efficiency
Application
2 × 𝑓𝑚
33 %
TV Broadcasting
Type
DSB-SC
SSB
Only sidebands
Provides
Single sideband
Provides
Easy & Simple
Complex &
Expensive
2 × 𝑓𝑚
100 %
FM
Broadcasting
Complex
Filter
Phase
Easy
Complex
𝑓𝑚
100 %
Radar & Military
Communications
Where :
• Green field : Advantage.
• Red field : Disadvantage.
No.
Filter Method
1 It generates single sideband signal by
2
3
4
5
Phase method
It generates single sideband signal by
combination or subtraction the two DSBSC signals, one of them are shifted by 90o.
The modulation is easier somewhat.
passing the DSB-SC signal through the
band pass filter.
The modulation is complex and
expensive.
The frequency Should be high.
Any frequency.
The demodulation is easy.
The demodulation is complex.
It provides the power and the noise is low.
Envelope Detector
No.
Advantages
1 Low cost.
2 Simple & Easy.
3 Accurate and reliable.
Disadvantages
Distortion.
Insensitive.
Selective fading.