Types of Multiplexing Techniques for CSIR NET JRF 2019

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Topics:

FDM (Frequency Division Multiplexing)

WDM( Wavelength Division Multiplexing)

TDM (Time Division Multiplexing)

a. Synchronuous TDM

b. Asynchronuous TDM

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FDM

• FDM stand for Frequency Division Multiplexing Technique.

• In FDM, different frequencies will be combined as the one frequency and transmitted in the channel and at the receiver end again it will be separated as it was.

• It is totally based upon the frequency combining and division

Working of FDM

WDM

• WDM stands for wavelength Division Multiplexing Technique.

• It multiplexes the optical carrier signals into a single optical fibre signal and transmit it further to the channel.

• It is widely used in SONET (Synchronous Optical Network) with high efficiency.

Working of WDM

TDM

• It stands for Time Division Multiplexing Technique of Multiplexing.

• Each frame or packet of data will be allotted the time slot.

• It transmits the digital signals over the transmission network.

• It is used for high speed transmission

• It can be of two types:

• Synchronous TDM (with common clock signal sharing)

• Asynchronous TDM (without sharing common clock)

MCQ

Q1. Which type of multiplexing technique is used in SONET?

Options:

A. Asynchronous TDM

B. FDM

C. WDM

D. Synchronous TDM

Answer: C

Q2. SONET is:

Options:

1. Synchronous Optical Network

2. Simultaneous Optical Network

3. Synchronous Optimized Network

4. Structural Optical Network

Answer: A

We learnt about:

#Frequency Division Multiplexing

# Wavelength Division Multiplexing

# Time Division Multiplexing

# Synchronous Time Division Multiplexing

# Asynchronous Time Division Multiplexing

-Mayank