SSBSC Single Side Band - Suppressed Carrier Compressed

This PowerPoint presentation is all about the definition of SSBSC or Single Side Band Suppressed Carrier. It consists of rich visuals along with the technique of modulation. Also a simplified version of derived expressions help the student to understand more about the topic. Moreover its suitable for students aiming for electronics and communication engineering.

1. SSB-SC
Single Side Band-
Suppressed Carrier
Presented By:
Arijit Dhali

2. What is SSB-SC?
Theprocessofsuppressingoneofthesidebands
alongwiththecarrierandtransmittingasingle
sidebandiscalledasSingleSidebandSuppressed
CarriersystemorsimplySSBSC.
Position of
Suppressed
Carrier
Lower
Sideband
Upper
Sideband
f
cf
c-f
m f
c+f
m
Single Sideband Suppressed Carrier
Allworkaredoneusingtwosignalstypes:
•ModulatingSignal
•CarrierSignal

3. Let us consider the mathematical expressions for the modulating and the
carrier signals as follow:
m(t) = A
mcos(2πf
mt)Message Signal:
After we apply Fourier Transform,
Mathematical Expression
before Modulation
Carrier Signal: c(t) = A
ccos(2πf
ct)
M(f) = A
m/2 [Δ(f-f
m)]+ A
m/2 [Δ(f+f
m)]Message Signal:
Carrier Signal: C(f) = A
c/2 [Δ(f-f
c)]+ A
c/2 [Δ(f+f
c)]
Wave Form of Message Signal
Wave Form of Carrier Signal
Fourier Transform of Carrier Signal
Fourier Transform of Message Signal

4. Mathematical Expression
after Modulation
After modulation and passing through Band Pass Filter, we can derive this
certain expression,
For Upper Sideband: s(t) =
??????
??????
??????
??????
2
cos[2π(f
c+f
m)t]
For Lower Sideband: s(t) =
??????
??????
??????
??????
2
cos[2π(f
c-f
m)t]
When Single Sideband = Upper Sideband
When Single Sideband = Lower Sideband
For USB, portion after
cut-off frequency
For LSB, portion before
cut-off frequency

5. Block Diagram of SSB-SC Signal
Product
Modulator
Product
Modulator
-90˚ Phase Shifter
Local
Oscillator
-90˚ Phase Shifter
Σ
A
mcos(2πf
mt)
A
ccos(2πf
ct)
A
msin(2πf
mt)
A
csin(2πf
ct)
s
1(t)
s
2(t)
s(t)
+
-

6. •Bandwidth
Bandwidth &
Power Calculation
WeknowthattheDSBSCmodulatedwavecontainstwosidebandsanditsbandwidthis2f
m.Since
theSSBSCmodulatedwavecontainsonlyonesideband,itsbandwidthishalfofthebandwidthof
DSBSCmodulatedwave.
Bandwidth of SSBSC modulated wave =
2????????????
2
= f
m
•Power
ThepowerofSSB-SCis,
P
t= P
USB= P
LSB =
??????
??????
2
??????
??????
2
8??????

7. Advantages &
Disadvantages
When coming to angles, there are certain Advantages and Disadvantages.
●Advantages:
1.Bandwidth or spectrum space occupied is lesser than AM and DSBSC waves.
2.Transmission of more number of signals is allowed.
3.Power is saved.
4.High power signal can be transmitted.
5.Less amount of noise is present.
6.Signal fading is less likely to occur.
●Disadvantages:
1.The generation and detection of SSBSC wave is a complex process.
2.The quality of the signal gets affected unless the SSB transmitter and receiver have an
excellent frequency stability.

8. The Applications of SSB-SC Signal are:
Applications
●For power saving requirements and low bandwidth requirements.
●In land, air, and maritime mobile communications.
●In point-to-point communications.
●In radio communications.
●In television, telemetry, and radar communications.
●In military communications, such as amateur radio, etc.

9. CREDITS: This presentation template was created by Slidesgo,
including icons by Flaticon, and infographics & images by Freepik
THANK YOU
For your time towards our presentation