Jun 172009
WCDMA has 3.84 Mcps (chip per second).
One 10-ms radio frame is divided into 15 slots.
1000 ms has 3.84 10^6 chips
10 ms has 3.84 10^4 chips
15 slots have 3.84 10^4 chips
1 slot has 38400/15 = 2560 chips
downlink spreading factor from 4 to 256
uplink spreading factor from 4 to 512
With spreading factor 4,
1 slot has 2560/4 = [...]
