WCDMA vs. GSM
|
|
WCDMA
|
GSM
|
|
Carrier spacing |
5MHz |
200 kHz |
|
Frequency reuse factor
|
1 |
1 - 18 |
|
Power control
frequency |
1500 Hz |
2 Hz or lower |
|
Modulation |
QPSK |
GMSK |
|
Frequency diversity |
5MHz bandwidth gives
diversity with Rake receiver |
Frequency hopping |
|
Packet data |
Load-based packet
scheduling |
Time slot based
scheduling with GPRS |
|
Downlink transmit
diversity |
Supported for
improving downlink capacity |
Not supported by the
standard, but can be applied |
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