Distinguish between TDMA and CDMA
Sr. No.
|
Parameter
|
TDMA
|
CDMA
|
1 |
Definition
|
Entire bandwidth is shared among different subscribers at Fixed predetermined or dynamically assigned time intervals/slots.
|
Entire bandwidth is shared among different users by assigning unique codes.
|
2 |
Bandwidth Available
|
Time sharing of satellite transponder takes place
|
Sharing of bandwidth and time both takes place
|
3 |
Synchronization
|
Synchronization is essential
|
Synchronization is not necessary
|
4 |
Interference
|
Due to incorrect synchronization there can be interference between the adjacent time slots.
|
Both type of interference will be present
|
5 |
Guard bands
|
Guard times between adjacent timeslots are necessary.
|
Guard bands and Guard times both are necessary
|
6 |
Active terminals
|
Terminals are active in their specified slot on same frequency
|
All terminals active on same frequency
|
7 |
Signal separation
|
Synchronization in time
|
Code separation
|
8 |
Near Far Problem
|
No
|
Yes
|
9 |
Handoff
|
Hard handoff
|
Soft handoff
|
10 |
Application
|
Advanced mobile phone, system(AMPS), Cordless telephone
|
IS95 Wide band, CDMA 2000,2.5G and 3G
|