In this post we will compare different 3G technologies. Comparison is done using Receiver structure, Support closed-loop power control, Handoff, Demodulation mode, Chip rate, Transmit diversity mode, Synchronization mode and Core network. This is shown in the following table.
WCDMA
|
cdma2000
|
TD-SCDMA
|
|
Receiver
structure
|
Rake
|
Rake
|
Rake
|
Support
closed-loop power control
|
Yes
|
Yes
|
Yes
|
Handoff
|
Soft handoff and hard handoff
|
Soft handoff and hard handoff
|
Relay handoff
|
Demodulation
mode
|
Coherence demodulation
|
Coherence demodulation
|
Coherence demodulation
|
Chip
rate (Mcps)
|
3..8
|
N*1228
|
1.2
|
Transmit
diversity mode
|
TST, STT, and FBT
|
OT and ST
|
None
|
Synchronization
mode
|
Asynchronous
|
Synchronous
|
Synchronous
|
Core
network
|
GSM
|
ANSI-41
|
GSM
|
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