Here are the mentioned least seven different functions where CDMA is different from GSM.
Functions
GSM
CDMA(IS-95)
Frequency
900MHz; 1800MHz;1900MHz
800MHz;1900MHz
Channel Bandwidth
Total 25 MHz bandwidth with 200 KHz per channels, 8 timeslots per channel with frequency hopping.
Total 12MHz with 1.25 MHz for the spread spectrum.
Voice Codec
13Kbits/second
8Kbits/second or 13Kbps
Data bit rate
9.6 Kbits/second or expandable
9.6Kbits
SMS
160 characters of text supports
120 characters
SIM Card
Yes
No
Multipath
Causes interference and destruction to service
Used as an advantage
Radio Interface
TDMA
CDMA
Handoff
Hard
Soft
System Capacity
Fixed and limited
Flexible and higher than GSM
CDMA
GSM
Code Division Multiple Access
Global System for Mobile communication
Storage type : internal memory
SIM memory
Global market share : 25%
75%
Dominant standard in the U.S.
Dominant standard worldwide except the U.S.
There is one physical channel and a special code for every device in the coverage network. Using this code, the signal of the device is multiplexed, and the same physical channel is used to send the signal
Every cell has a corresponding network tower, which serves the mobile phones in that cellular area.
Less Accessible
Most Accessible
Frequency band : Single(850 MHz)
Multiple(850/900/1800/1900 MHz)
Handset specific
SIM specific. User has option to select handset of his choice.
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