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

To: saukriver who wrote (9026)	3/25/2001 12:55:14 PM
From: quidditch	Respond to of 197036

sauk, You baffle me when you throw in this new technology "cdma Is-95, 1x rate." Equally confused by your statement that "cdma2000 1xrt max is 2.4 megabits per second" as that would seem to be the max speed for CDMA2000 1xEV and not CDMA2000 1xrtt. my $0.02 (and I've not kept up with threads in a while, so I count on being chastized by engineer, Eric, Ben, et.al): 1. You seem on right track to me. At one point, Koreans/Japanese began referring to 1xrt as IS-95c; that seems to have faded, but 1xrt can be thought of as a not-quite CDMA 2000 in Q's original adoption of its nomenclature, for the reasons Eric describes above; thus, is-95c. Originally, 3xrt was dubbed as the official 3G/IMT2000 standard, but that has faded as 1xrt/ev/do has emerged and as spectrum issues loll here. 2. Agreed: CDMA2000 1xrt/ev and peak rate of 2.4 megabits/second can ONLY mean ol' HDR, or 1x ev/do (?) Viterbi last year said average througput achieved (back then) by Q's engineers was 1 megabit. 3. I've never heard before of CDMA 1x utilizing 8 channels and, consequently, never heard or derived 8 channels times 14.4 kbps. Thus, the 115.2kbps makes no sense to me either (then again, I've been out of touch). I think that this is a bastardization of the GPRS architecture. Q and IJ have consistently discussed 1x and its variations as THREE carriers and, with 1x/ev/do (?), AKA HDR, one of those carriers can be selectively and dynamically dedicated to a data-only channel with the theoretical throughputs and peak rates referred to above. 4. I think only when Q named its "original/pure" 3X architecture of CDMA 2000, or 3X, and therefore expanded spectrum in the ITU-determined 3G standards, can one address more than three carriers--i.e., more than 5 MgHz of contiguous spectrum. FWIW, Steve