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Which of the following leads to the 3G evolution of GSM, IS-136 and PDC systems?

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Which of the following leads to the 3G evolution of GSM, IS-136 and PDC systems?

(a) W-CDMA

(b) GPRS

(c) EDGE

(d) HSCSD

I had been asked this question during an internship interview.

This intriguing question comes from Third Generation (3G) Wireless Networks topic in chapter Modern Wireless Communication Systems of Wireless/Mobile

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Correct choice is (a) W-CDMA

The explanation is: The 3G evolution for GSM, IS-136 and PDC systems leads to W-CDMA (Wideband CDMA). It is based on the network fundamentals of GSM, as well as merged versions of GSM and IS-136 through EDGE. GPRS, EDGE and HSCSD are 2.5G networks.

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