Hi, I'm currently studying that topic and would like to ask numerous questions please. 1. The modulation symbol rates refers to the data signal, before it's being spread? Otherwise, I don't understand how they reached the 960K and 15K figures. 2. Each channel takes 38400 chips out of the (2^18 - 1) exist in a Gold code, and each of the 15 slots of this frame takes 38400/15 chips out of these 38400 chips? Did I get it right? 3. I don't manage to understand that part. What is operator, in terms of channel, cell, cluster? What do they mean by three cell layers? Thank you.