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Technology Stocks : Nokia (NOK)

NOK 6.495

+0.9%

Jan 22 3:59 PM EST

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To: ehopper who wrote (7968)	10/29/2000 11:19:19 AM
From: slacker711	Read Replies (1) of 34857

Qualcomm's own white paper shows the mean rate at above 350kbps for HDR (Bell curve) Now for these HDR rates of 5.2 Mbps and 15 Mbps I have heard talk of in the future I can only speculate: I believe that the average throughput that Qualcomm was seeing was 750Kbps for systems with a single antenna and 1Mbps with a diversity antenna system. The 5.2Mbps and 15Mbps quoted are not for HDR but rather the burst data rates for 1XTREME in a 1.25MHz and 5MHz environment respectively. I believe that the higher data rates are achieved through the use of new antenna arrays and the use of 64QAM. No idea of the S/N ratios that would be needed are actually achievable.... This requires I believe a walsh code length of 2 which means that a maximum of 4 people per RF channel can be allocated this rate at any given time so the service My understanding of HDR (and please correct me if I am wrong) is that HDR polls the various handsets in use and transmits it's full throughput to 1 receiver for a very brief period. The throughputs I quoted are from the following white papers... qualcomm.com Also, I am sure that you can find a ton of more technical info. (both 1XTREME and HDR) on the 3GPP2 FTP site.... ftp://ftp.3gpp2.org/TSGC/Working/ Slacker

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