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What is the chip rate of W-CDMA?(a) 1.2288 Mcps(b) 3.84 Mcps(c) 270.833 Ksps(d) 100 McpsI got this question during an interview.This intriguing question comes from 3G W-CDMA (UMTS) in portion Modern Wireless Communication Systems of Wireless/Mobile

Answer»

Correct ANSWER is (b) 3.84 MCPS

The explanation is: W-CDMA USES a chip rate of 3.84 Mcps. Chip rate is the product of symbol rate and spreading factor. If the symbol rate is 960 KBPS and spreading factor is 4 for W-CDMA, then the chip rate is 3.84 Mcps. The chip rate for CDMA2000 and GSM are 1.2288 Mcps and 27.0833 Ksps respectively.



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