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: Eric L who wrote (13906)	7/17/2001 6:42:35 PM
From: 49thMIMOMander	Read Replies (2) \| Respond to of 34857

Standard band CDMA TIA/EIA-95 (previously called IS-95) utilizes 1.2288 Megachips per second (Mcps) as the chip rate, resulting in a bandwidth of slightly less than 1.25 MHz. That is really magic with an optional 48 tap filter, except if the definition of bandwidth is kind of where it starts beeing just a little,little less than in than middle of the cocktail band... Wow, transition band 1.2500-1.2288 = appr 0.0212/2 = 0.0106Mhz = 10.6kHz That is kind of a ratio of 10/1250 = 1/125. My direct guess would be it takes something like a 48,000 tap filter to do that?? (pretty good, 2 out five numbers correct, could be worse) Then we have this other odd example of odd math. "This is not true of the 4.096 Mcps chip rate that has been specified for the competing W-CDMA proposal, which results in a guard band of 0 kHz, making it unacceptable from a spectral emissions perspective." 5000-4096 = 0, yes?? Even (5000-4960)/2 is more than 10.6kHz, but maybe the numbers warp through the gilder orthogonal cosmos space?? "The choice of a 4.096 Mcps chip rate on the other hand allows for only four wideband CDMA carriers in the same 20 MHz allocation, with no guard band at all." Did he try to cram in 5, as it became "only four", like dividing 20 by 5 gives (only) 4?? Not five like in regular math?? No wonder no operator want to have anything to do with this fuzzy math, except if a memeber of the US cavalry knocks on the door, or no paired 20Mhz bands can be found because of the same cavalry. When the saviour stepped down on this earth, with an urgent message... To:Clark Hare who wrote (25012) From: Perry LaForge Thursday, Mar 25, 1999 2:03 PM View Replies (2) \| Respond to of 101798 Clarke...the harmonization of the modes is still in the works. Please do not draw premature conclusions at this point on any parameter. The key here is a single standard supporting IS41 and GSM which was being fought by ETSI and 3GPP (essentially blowing off TABD.) *We will now use operators to help resolve some of the other items and have already made progress.* (how is the penetration going, smilingly and bending over, little help by the cavalry?? Any Ruffians circling??) and this oldie.. (1) A single, converged worldwide CDMA standard should be selected for the third generation. (2) The converged CDMA standard must accommodate equally the two dominant network standards in use today (IS-41 and GSM-MAP). (3) Disputes on specific technological points should be resolved by selecting the proposal that either is demonstrably superior in terms of performance, features, or cost, or, in the case of alternatives with no demonstrable material difference, the choice that is most compatible with existing technology. Ilmarinen. Jacobs has actually improved in these years, maybe matured?? But how could the earthly visitor be so mistaken: "I do believe that operators will step up because it is in their interest to reduce differences where possible. Some are already doing this, so we shall see."