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Technology Stocks : Qualcomm Moderated Thread - please read rules before posting -- Ignore unavailable to you. Want to Upgrade?

To: Raymond who wrote (48476)	11/6/2005 5:29:01 PM
From: samim anbarcioglu	Respond to of 196444

Lars, The term slot usually refers to timeslot, which is what the TDMA waveforms e.g. GSM is based upon. Here, a time slot also means a connection. A user owns that timeslot during his connection. In pure CDMA, there are no timeslots. But, for various purposes, a time division scheme can be implemented on top of the underlying CDMA. I think in WCDMA they do have a term called slot, but this is really not the same concept at all. I don't really know much about what WCDMA, and I don't know why they had to divide a frame into 'slots'. But still, the power control is not as simple as 1dB up or down per slot. That would be what they call 'fast power' control, and I believe it can't be very useful. Long term true power control is complex, based on the particular modulation schemes of the data being added before spreading into the spectrum, but i don't know the exact algorithm. I thought for a moment that you meant CDMA is based on time division when you mentioned 'slots'. Sorry if I misunderstood your post.