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TEL Lecture 2

The document discusses three multiple access techniques: TDMA, FDMA, and CDMA. It focuses on TDMA, describing that it allows users to transmit only within assigned time slots, with different users transmitting in different slots, and requiring a centralized controller to define frames divided into time slots assigned to each user.

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16 views4 pages

TEL Lecture 2

The document discusses three multiple access techniques: TDMA, FDMA, and CDMA. It focuses on TDMA, describing that it allows users to transmit only within assigned time slots, with different users transmitting in different slots, and requiring a centralized controller to define frames divided into time slots assigned to each user.

Uploaded by

nssaini1712
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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TDMA, FDMA, and CDMA

Kanika Khandelwal
Time Division Multiple Access (TDMA)

Each user is allowed to transmit only within specified time


intervals (Time Slots). Different users transmit in differents Time
Slots.
When users transmit, they occupy the whole frequency bandwidth
(separation among users is performed in the time domain).

2
TDMA : Frame Structure

TDMA requires a centralized control node, whose primary function is


to transmit a periodic reference burst that defines a frame and
forces a measure of synchronization of all the users.
The frame so-defined is divided into time slots, and each user is
assigned a Time Slot in which to transmit its information.

Frame
TF

TS
B u nce

Time Slot
t
rs
re
fe
Re

3
TDMA : Frame Structure

User 1 User 2 User 3

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