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Differentiate between WCDMA and CDMA 2000

written 6.7 years ago by teamques10 ★ 68k

•   modified 2.9 years ago

mobile communication

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written 2.9 years ago by teamques10 ★ 68k

Difference between CDMA 2000 and WCDMA

Sr. No.	Parameters	CDMA 2000	WCDMA
1	Basic Concept	CDMA is an algorithm that brings in more channels in a specified bandwidth.	WCDMA uses the basic technology of CDMA but incorporates it into GSM and EDGE.
2	Network	Used in 2G Networks.	Used in 3G Networks.
3	Carrier Spacing	Spacing between CDMA operators to obtain channel protection 3.75 MHz.	spacing between WCDMA operators to obtain channel protection 5 MHz.
4	Chip Rate	Number of DSSS pulses per second are 3.68 MHz.	Number of DSSS pulses per second is 4.096 MHz.
5	Speed	Slower than WCDMA.	Faster than CDMA.
6	GSM	Act as a competitor to GSM.	Work with GSM.
7	Base Stations Synchronization	Base stations may require synchronous timings.	Base stations do not require synchronous timings.
8	Frame Length	The time duration of a frame between the beginning and end of the frame is 20 ms, also uses 5, 30, 40 ms frames.	The time duration of a frame between beginning and end of the frame is 10 ms
9	Bandwidth	1.25 MHz.	5 MHz.
10	Power Control Frequency	The output power of the transmitter is controlled by itself at the frequency of 800 Hz.	The output power of the transmitter is controlled by itself at the frequency of 1500 Hz
11	Peak Data Rate	614 kbps.	2 Mbps.
12	Spreading Factor	It is lower in CDMA.	It is higher in WCDMA.
13	Forward Link Pilot	CDM and Common Pilot used for channel modulation from the PN (Pseudo Noise) spreading codes	TDM and Dedicated pilot used for channel modulation from the PN (Pseudo Noise) spreading codes
14	Antenna Beam Forming	Auxiliary pilot used for directional signal transmission & reception.	TDM and Dedicated pilot used for directional signal transmission & reception.
15	Overhead	Low (because of the shared pilot, code Channel)	High (because of non-shared, pilot code Channel)
16	Voice Coder	Uses EVRC voice coder.	Uses AMR voice coder.

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