The correct answer is A. 1.2288 Mcps.
W-CDMA (Wideband Code Division Multiple Access) is a 3rd Generation (3G) cellular technology that uses a spread spectrum technique to allow multiple users to share the same radio frequency (RF) channel. The chip rate is the rate at which the W-CDMA signal changes, and it is a key parameter that determines the system’s performance.
The chip rate of W-CDMA is 1.2288 Mcps, which means that the signal changes 1.2288 million times per second. This is a relatively high chip rate, and it is one of the reasons why W-CDMA is able to support high data rates.
The other options are incorrect because they are not the chip rate of W-CDMA. Option B is the chip rate of CDMA2000, Option C is the chip rate of GSM, and Option D is the chip rate of UMTS.
I hope this helps!