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TIME DIVISON MULTIPLEXING
NAME : MR ABHISHEK KUMAR
REG.ID: 10114008
SEM:FIFTH
STREAM: IT
BTECH(2014-2018)
IIIT KALYANI
EMAIL ID: abhishekseth.3344@gmail.com
Why we need multiplexing in
communication system ?
 We know that a network
always have limited
amount of bandwidth.
9/6/2018
 So, for proper utilization of
bandwidth to achieve a
specific goal we go for
multiplexing.
 Like Divide bandwidth of low
level channel to high level
channel
MULTIPLEXING
MULTIPLEXING TYPES:
FREQUENCY DIVISON MULTIPLEXING
• Analog Technique
• Channel created based on Frequencies
• Application AM & FM Radio broadcasting
WAVELENTH DIVISON MULTIPLEXING
• Uses high data rate capability of
fibre optic cable
• Channel are created based on
Wavelengths
• Application SONET
WHY WE NEED TIME
DIVISON MULTIPLEXING ?
This multiplexing allow to transmit
a signal at high BANDWIDTH through
Channel But not Frequency Division
multiplexing .
TDM is used for multiplexing of Digital
Signal.
TIME DIVISON MULTIPLEXING
 Each connection occupies a
portion of time.
 In this Figure each signal
occupies ¼ th of shared link to
transfer data.
Under the same communication channel
sample of many signals can be transmitted
and recover the receiving end. This technique
Is knows a TDM.
Lets See what
happens inside
TDM system .
LPF1
LPF2
LPF1
LPF2
LPF3
EncoderQuantizer Decoder
. .
LPF3
Commutator
Decommutator
Channel
t1
t2
t3
t1
t2
t3
m1(t)
m3(t)
m2(t)
m1(t)
m2(t)
m3(t)
t1 t2 t3 ts+t1 ts+t2 ts+t3
Ts=time taken by commutator in one rotation
ts
Commutator:- it is a rotating switch. rotate in anticlockwise.
Decommutator:- it is a rotating switch. rotate in clockwise.
Quantizer: purpose of quantizer is rounding up to a quantization level.
Encoder: generate unique binary code.
LPF: low pass filter is used for limiting the bandwidth. Commutator O/P
t1
m1(t)
Time divison multiplexing
Time divison multiplexing

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Time divison multiplexing

  • 1. TIME DIVISON MULTIPLEXING NAME : MR ABHISHEK KUMAR REG.ID: 10114008 SEM:FIFTH STREAM: IT BTECH(2014-2018) IIIT KALYANI EMAIL ID: abhishekseth.3344@gmail.com
  • 2. Why we need multiplexing in communication system ?  We know that a network always have limited amount of bandwidth. 9/6/2018  So, for proper utilization of bandwidth to achieve a specific goal we go for multiplexing.  Like Divide bandwidth of low level channel to high level channel MULTIPLEXING
  • 3. MULTIPLEXING TYPES: FREQUENCY DIVISON MULTIPLEXING • Analog Technique • Channel created based on Frequencies • Application AM & FM Radio broadcasting WAVELENTH DIVISON MULTIPLEXING • Uses high data rate capability of fibre optic cable • Channel are created based on Wavelengths • Application SONET
  • 4. WHY WE NEED TIME DIVISON MULTIPLEXING ? This multiplexing allow to transmit a signal at high BANDWIDTH through Channel But not Frequency Division multiplexing . TDM is used for multiplexing of Digital Signal. TIME DIVISON MULTIPLEXING  Each connection occupies a portion of time.  In this Figure each signal occupies ¼ th of shared link to transfer data. Under the same communication channel sample of many signals can be transmitted and recover the receiving end. This technique Is knows a TDM.
  • 5. Lets See what happens inside TDM system . LPF1 LPF2 LPF1 LPF2 LPF3 EncoderQuantizer Decoder . . LPF3 Commutator Decommutator Channel t1 t2 t3 t1 t2 t3 m1(t) m3(t) m2(t) m1(t) m2(t) m3(t) t1 t2 t3 ts+t1 ts+t2 ts+t3 Ts=time taken by commutator in one rotation ts Commutator:- it is a rotating switch. rotate in anticlockwise. Decommutator:- it is a rotating switch. rotate in clockwise. Quantizer: purpose of quantizer is rounding up to a quantization level. Encoder: generate unique binary code. LPF: low pass filter is used for limiting the bandwidth. Commutator O/P t1 m1(t)