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

To: nbfm who wrote (3314)	9/28/2000 8:55:11 PM
From: mightylakers	Respond to of 197624

Well, that really depends on how the 3G is shaped up by 2005 IMO. There're two part in wireless world, one is the RTT(radio transmission technology), the other one is the air-interface processing, which including both air side and land side operation. TD-SCDMA is not using anything totally different as far as the logical channels concerned(in compare with ITU standard). The main difference it claims is on the RTT part, which using smart antenna, software radio and synchronous CDMA. As far as which system, GSM or IS-95, is easier to be upgraded into TD-SCDMA. I think they are about the same because anyway you have to change about the same things no matter which system you are upgrading, on land side you got to be able to talk IS-41 or GSM-MAP. On the air side you got to use different cards, RF module and DSP. However the difference can be that if TD-SCDMA is currently putting its emphasis on GSM side then you might say that by that time it is more poised in upgrading GSM networks. However, as I mentioned above, TD-SCDMA's main claims are synchronous CDMA(which synchronize the multiple users' spreading sequence at base station), software radio(which by large part is still a pipe dream in research stage) and smart antenna(which uses antenna array for beam forming, spot coverage to increase capacity). The synchronous CDMA part is an attempt to improve the orthogonality of the spreading codes so it is not a fundamental change. Software radio belong to the SDR effort, which I don't think is owned by TD-SCDMA, it could be used by any system if it turns out to be the real deal. Same is true for the smart antenna, in fact it's also part of the CDMA2000 proposal. So as we can see, TD-SCDMA, other than a TDD mode, is not offering something dramatically different, not to mention its so-called performance data are largely based on some theories need some major works before they are actually usable in practical world. Now considering the future of the 3G and the current efforts in harmonization. I think time to the market and how mature is the technology will play a major role, esp in those areas where different standards are competing directly. TD-SCDMA may or may not have some market due to the help from the Chinese government but I seriously doubt it can be a major player. JMHO, engineer, clark, any comments?