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Technology Stocks : Qualcomm Incorporated (QCOM)
QCOM 166.05+0.6%3:59 PM EST
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To: waitwatchwander who wrote (11119)6/4/1998 2:55:00 PM
From: Clarksterh  Read Replies (1) of 152472
 
Chip rate - The slower chip rate, as used by Qualcomm, is probably not slow enough to cause any real change in recurring cost. The difference is just not great enough. The difference in chip rates will effect the following:

1) Transmission frequency bandwidth. So the frequency plan will be a little different. So what? Receivers are cheap and new ones will be needed regardless of what scheme is used.

2) Maximum data rate transmission, but since the maximum data rate is likely to be substantially less than either chip rate, this is probably a non-issue for the users or telecoms.

3) The 'de-Coding' scheme and the chips/algorithms used to decode the data. This is the one of the most difficult parts of CDMA, and it is likely that the change in chip rate or especially code structure (Engineer - do you know enough about the W-CDMA scheme to know whether they are trying to change that?) could cause all of the ASICs to need to be redesigned and/or replaced.

Thus, from a systems engineering point of view there probably isn't much difference, except that by changing the coding scheme and/or chip rate IS-95 might have to redesign and reinstall one of the most difficult pieces of hardware. However, I am surprised Qualcomm hasn't complained about other pieces of the W-CDMA standard such as the interface between the Base Station Controller and the Base Stations or between POTS and the mobile system. That is another way that Ericsson could make it expensive for IS-95 telecoms to upgrade to W-CDMA. Maybe a complete redesign was needed anyway, so both GSM and IS-95 telecoms are in the same boat? Anyone know?

Clark
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