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

To: rkral who wrote (23353)	6/4/2002 4:37:22 PM
From: mightylakers	Read Replies (2) \| Respond to of 196649

Here are some answers. GSM is FDD, so the mobile can operate full-duplex Yes, but it is not doing it in a strict sense, i.e. the real sending and receiving at the exact same time. Well with even more nerdy definition, if you got just one processor then things are always done in turn<ggg> Oh well. it uses tx-rx frequency pairs with the same frequency separation for all channels Yes, with different band has different separation. the mobile transmits and receives in one time slot out during a frame of 8 time slots Yes. the mobile tx and rx occurs in each and every frame. There are no "holidays" Not exactly, you could have DTX and DRX, but that timeslot is still occupied by you anyway. It is a way to save the power. The rx and tx physical time slots are separated by 2 (??) slots. I think it is 3 slots minus time advance. if the above is to reduce duplexer costs This is one of the cost saving aspect comparing to CDMA, where a divider is needed. the handover is based on some kind of 'better/best signal' algorithm. Yes, basically MS keeps on scanning the strength of a bunch of candidate frequencies, and report that to the BTS. BTS will let MS know which one it need to use. And this should answer your question 8). so hope you don't find TOO many No, you are pretty much on the mark:-)