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What are the technical differences in W-CDMA and CDMA 2000.

written 3.5 years ago by teamques10 ★ 68k

modified 3.0 years ago by pedsangini276 • 4.8k

wireless networks

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written 3.5 years ago by teamques10 ★ 68k

Major differences between WCDMA & CDMA 2000 standards are shown below:

Parameter	W-CDMA	CDMA 2000
Carrier spacing	5 MHZ	3.75 MHZ
Chip rate	4.096 MHZ	3.6864 MHZ
Data modulation	BPSK	FW-QPSK, RV-BPSK
Spreading	Complex (OQPSK)	Complex (OQPSK)
Power control frequency	1500 HZ	800 HZ
Variable data rate implement	Variable SF Multimode	Puncturing, multimode
Frame duration	10 ms	20 ms
Coding	turbo and convolutional	Turbo and convolutional
Synchronization status of BS	Asynchronous	Synchronous
Base station detect/acquisition	3 steps: slot,frame,code	Time shifted PN correlation
Forward link pilot	TDM dedicated pilot	CDM dedicated pilot
Antenna beam forming	TDM dedicated pilot	Auxiliary pilot
Spreading factor	Higher	Lower
Core network	GSM map	ANSI-41 map
Channel bandwidth	5.0 MHZ	1.25 MHZ (1X),3.75 MHZ(3X)
Mode of operation	FDD and TDD	TDD
Source identification for sector	512 Unique scrambling codes	One PN code, 512 codes unique offsets
Source identification  codes for mobile	Unique scrambling codes	One long PN code,  unique offsets
Overhead	High	Low

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