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Technology Stocks : The New Qualcomm - a S&P500 company

QCOM 174.54

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Nov 13 3:59 PM EST

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To: quidditch who wrote (3651)	11/26/1999 2:21:00 PM
From: Bux	Read Replies (1) of 13582

I thought that GSM had better spectral efficiency than "pure" TDMA. Is that not right? I follow these issues to the point that I think I have a general understanding that is sufficient for my practical purposes (investing and general curiosity) therefore others may offer a more accurate answer but my understanding is that GSM is "pure" TDMA. It has a few bells and whistles that other TDMA standards don't have and probably adjusted or different timing, channel widths, number of channels etc. I do not know what the specific differences are but wireless must work within the limits of physics. The "brick wall" for maximum throughput is reached much sooner with TDMA than with CDMA. Thus the capacity of TDMA based networks are much more similar to themselves than to CDMA based networks. The capacity numbers are hard to quantify exactly but it would be interesting to review the comparison of the various capacity ranges. Bux

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