W-CDMA
Synonyms
Examples
Despite incompatibility with existing air-interface standards, late introduction and the high upgrade cost of deploying an all-new transmitter technology, W-CDMA has become the dominant standard.
Elsewhere, W-CDMA deployments are usually marketed under the UMTS brand.
From an engineering point of view, W-CDMA provides a different balance of trade-offs between cost, capacity, performance, and density; it also promises to achieve a benefit of reduced cost for video phone handsets.
Even the maximum power output of class 1 is a lower level than the lowest powered mobile phones. citation UMTS & W-CDMA outputs 250 mW, GSM1800/1900 outputs 1000 mW, and GSM850/900 outputs 2000 mW.
Further, it is supposed to cover all usage scenarios, whereas W-CDMA is optimised for symmetric traffic and macro cells, while TD-CDMA is best used in low mobility scenarios within micro or pico cells.
However, divergent requirements resulted in the W-CDMA standard being retained and deployed globally.