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

To: Eric L who wrote (26296)	9/3/2002 12:05:06 AM
From: pheilman_	Respond to of 196444

Eric, <<in actual implementation, GSM carriers are much more inclined to mix and match both core elements and radio access elements, a combination of the two, and peripherals, from multiple vendors, than cdma carriers have been inclined to do?>> That would be because TDMA systems are trivial. What, BPSK, QPSK, a bit of a guard band? This is in the domain of a tiny microcontroller, or a DSP. Similar to AM radios, optimized for low-cost receivers at the cost of power efficiency, GSM is optimized for simplicity of the RF system at the expense of spectral-efficiency. Worked well, but in certain locations spectrum is no longer cheap or available. CDMA systems require much tighter integration between various modules. A linear amplifier for multiple tones needs much more specification and design. Paul