Differences GSM And CDMA

Differences GSM And CDMA

- GSM (Global System For Mobile Communication) is the most popular mobile communications standard in the world. In a world GSM 850/900/1800/1900 MHz frequencies have the name of the Personal Communication Network. Gsm also provides services to transmit data at high speed, using technology Speet Circuit Data (CSD), High Speet Circuit Switch Data (HSCSD), General Pocket Radio Service (GPRS) and Enhanced Data rate for GSG Evolution (EDGE). GSM more in use in the CDMA 2000 1X eropa.CDMA primarily represents the third generation 3G.
- CDMA (Code Division Multiple Access) technique with a method of spreading spectrum.Berbeda Global System for Mobile Communication (GSM) which uses Time Division Multiplexing (TDM), CDMA does not provide specific frequency markers on each user. Each channel uses the full available spectrum

Competing CDMA and GSM, GSM on the other hand said that he was the best "Since GSM uses a SIM chip card technology, the world's most recycled, more secure and more advanced." Instead of CDMA followed saying that he is the best "Since CDMA is a next generation 3G technology selected and will be migrating to GSM CDMA because CDMA is more advanced. "
But which of these two statements is correct? Nokia said, "This discussion is not talking about the technology anymore, but the market wants." We think this is the best way to describe the war between these two cell phone technologies.

Initially, GSM services are superior because they have more and allow the transfer of data. However, CDMA and also offers the same features. Right now it is not possible to say that GSM is better than CDMA. Multimedia messages, video, high-speed Internet access, digital camera and PDA functions are also several features that can be found in the two technologies. New CDMA 1XRTT technology, more advanced than EDGE which is the beginning of next generation 3G technology because it allows a higher transfer rate.
Because bandwidth is a major problem in this era and also the number of channels (users) are allocated by a higher bandwidth than GSM CDMA CDMA has the advantage that it is better than GSM. Similarly, setting fees for the CDMA network is much cheaper than GSM.

Gain GSM:
- Facility to change the SIM card anytime.
- Facilities roaming, because the GSM cover more than 70%, easier international roaming with GSM.

Benefits of CDMA:
- Bandwidth is higher.
- Level of privacy and greater security in communications.
- Low Radiation when using cell phones.
- Only requires a single frequency is needed for some sectors / cell
- Does not require an equalizer to overcome the interference signal spectrum
- Can join with other access methods, do not need a timer (guard time) to see the range of time and guard band (guard band) to keep the intervention antarkanal
- Does not require frequency allocation and management
- Have a fine capacity to restrict the user access
- Has the protection of the process of tapping


conclusion
Viewed from this advantage is a probability that CDMA technology will dominate the mobile communications future. It is expected that future CDMA to be superior and all major cell operators will migrate to CDMA.