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Compare GSM and CDMA technologies.
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written 5.7 years ago by |
S.no | GSM | CDMA |
---|---|---|
1 | The GSM is based on wedge spectrum called a carrier. | The CDMA is based on spread spectrum technology. |
2 | This carrier is divided into time slots, and each user is assigned a different time slot. Thus, until the ongoing call is finished, no other user can access the same slot. | This technology allows each user to transmit over the entire frequency spectrum all the time. |
3 | Less security compared to CDMA technology. | More security is provided in CDMA technology. |
4 | No built-in encryption. | It has built-in encryption |
5 | Signals can be detected as the GSM signals are concentrated in the narrow bandwidth. | The signals cannot be detected easily in CDMA. |
6 | The GSM network operates in the frequency spectrum of 850MHz and 1900MHz. | The CDMA network operates in the frequency spectrum of 850MHz and 1900MHz. |
7 | GSM is used over 80% of the world’s mobile network. | CDMA is exclusively used in the United States, Canada and Japan. |
8 | GSM uses EDGE data transfer technology | CDMA has faster data transfer as EVDO ready data transfer technology is used |
9 | It offers a maximum download speed of 384 Kbps. | It offers a maximum download speed of 2 Mbps. |
10 | A SIM card is required for the working of GSM device. | CDMA phones do not have these pulses. |
11 | A GSM is more flexible than CDMA as the SIM can be replaced with other GSM devices. | A CDMA is not flexible. |
12 | GSM phones emit continuous wave pulse. Thus, there is a need to reduce the exposures to electromagnetic fields. | CDMA phones do not have these pulses. |
13 | GSM phone emits about 28 times more radiations on an average as compared to CDMA. | Very less radiation |