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To: Clarksterh who wrote (12393)	7/15/1998 1:39:00 PM
From: DaveMG	Respond to of 152472

Clark, I can't comment on the specific technical issues, however one of the reasons that the phones are bigger, and presumably more power consumptive is that the majority are dual mode an/dig. due to the aforementioned spotty coverage. I think it's fair to assume that if ERICY and Nokia etc are interested in WCDMA, THEY DONT THINK these technical considerations with respect to handset design are as important as Tero does. I also think that to claim that the battle for China has been won because there are 10 mil subs is preposterous. After all, how many Chinese are there anyway? IMO Tero's argument rests very heavily on his last statement, which is that WCDMA will manage to circumvent QC IPR, which at this point is of course a matter of faith.Faith is a very difficult thing to argue with. dave

To: Clarksterh who wrote (12393)	7/15/1998 2:42:00 PM
From: kech	Read Replies (2) \| Respond to of 152472

Clark - Thanks for explaining that. I had wondered about why the power savings of CDMAOne didn't currently translate to longer battery life. Tom

To: Clarksterh who wrote (12393)	7/15/1998 4:41:00 PM
From: Asterisk	Read Replies (4) \| Respond to of 152472

I think that you are WAY off base here. I don't mean to be pissy and really don't want to get into a contest of mine is bigger than yours, but... 1) due to the nature of GSM (TDMA) it will actually use less power when transmitting and recieving. Lets take a specific example. If we hold both powers at max AMPS transmit (28dbm) then the TDMA pulsed transmit would take less power. If your PA is only on for 1 out of 10 time slots then you would take max 1/8th the power right? in that example I assume that there is some penalty paid for the power up and down cycles. The lowest rate that the CDMA system transmits on is 1/8 rate. At that point you still spend 1/6th the power. Besides you will not be at 1/8th rate when you are speaking, only when listening and no information is passed. 2) Due to the nature of GSM (TDMA) the PA that they use is less power hungry and much cheaper. If you have a slotted system then you can afford 2 things, 1) more noise, and 2)less isolation. In a CDMA system you have to have some type of filtering to seperate the transmission of Recieve and Transmit signals. This filtering costs tons in the way of transmit power and power in general. In GSM you have no need for this filtering, your time slot is yours, either recieve or transmit whatever you want. The corollary to this is that when you have your own slot you need not worry about the noise you are transmitting inside your band. Noone else is affected so who cares? With CDMA (a noise limited system) ANY noise that you add to the system that is not directly associated to your communication will lower the capacity of the entire system. This causes the PA to be more complex and bigger, more lossy, more power hungry, etc... If I am wrong, TELL ME. This is all from school and some assumptions so I could very well be totally off base.