Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : Nokia (NOK) -- Ignore unavailable to you. Want to Upgrade?

To: 49thMIMOMander who wrote (13630)	7/12/2001 4:08:39 PM
From: 49thMIMOMander	Read Replies (2) \| Respond to of 34857

To pick one simple aspect - WCDMA is designed for 5MHz (as GSM already is 200kHz) - QCDMA is designed for 1MHz (as AMPS-TDMA were 30kHz and spectrum is a pain with a great cavalry criss-cross riding on the waves) -GSM can use the "guardbands" lost in QCDMA, not to forget the overlapping, problematic, inter-operator, GPS synchronized nyquist-slopes. That is - WCDMA does not gain from 5 to 10Mhz - QCDMA claims to gain by that extra 1MHz carrier - GSM gains from any transition from 200kHZ up to any MHz compared to the two above, no CDMA-style losses from medium or fast power control, not restricted by the 64 walsh code channels,etc,etc, almost as optimal as OFDMA. (when synchronized, exactly the same, but then not robust anymore) Bw, did anyone understand my example on 10,000 teenagers arriving at rock-festival (or fat middle managers at a golf conference), the need to keep track of all their inactive handsets?? And then to activate some to transfer that little SMS message, WAP page?? How much power control cell capacity is needed to send 160 bytes, how much shannon capacity is wasted just to get that handset up and going?? (zero for GSM, although the delay goes higher than the regular 1s) Ilmarinen In contrast to Seybold, these are the things that operators have learned to understand.