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Differentiate between WCDMA and CDMA 2000
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teamques10
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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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