To: Keith Feral who wrote (20259 ) 3/12/2002 6:15:20 PM From: rkral Read Replies (1) | Respond to >".. Goldman Sachs presentation. This slide shows data throughput comparisons in per sector in 5 & 10 MHZ. [edit:..] The slide is different than comparison in Qualcomm's White Paper - The Economics of Mobile Wireless Data. That study compares data throughput for a 1.25 MHZ carrier bandwidth for CDMA2000 1XEV vs. a 3.84 MHz carrier bandwidth for WCDMA." <the slide says 'pedestrian mobility' .. not vehicular .. so there is something amiss *. "throughput per 5 MHz of spectrum assumes three 1.25 MHz [edit: BW] carriers * (1050/3=350 kbps per 1x channel). Knowing this, it is obvious Qualcomm uses seven channels to calculate the capacity for 10 MHz bandwidth (7*350=2450 kbps per 10 MHz). This is new information .. to me, at least. So Qualcomm actually understates data capacity a little when they give the 5 MHz number (3 ch in 5 MHz - 262.5 kbps, 7 ch in 10 MHz - 306.2 kbps, and 11 ch in 15 MHz - 320.8 kbps *average per sector per 1.25 MHz BW * (for each instance of kbps)).
