Hand off
1G is based on frequency modulation,analog technology,TDMA 2G is based on digital technology,FDMA 3G is based on CDMA which is a faster internet access source
There is no difference at all. EVDO (Evolution Data Optimized) is a 3G (3rd generation) technology. It allows the user to access high speed internet over his mobile device on a CDMA network. Hope this helps.
Raytheon
Code Division Multiple Access or CDMA cell phones utilize a technology that permits the use of several frequencies at the same moment to send and receive data and voice transmissions. CDMA is newer radio technology that is designed to compete with the older Global System for Mobile Communications (GSM) network. As a result, CDMA phones cannot use GSM cell towers. Another difference is that GSM phones use SIM cards while CDMA phones do not.
tdma and fdma
- CDMA800 (low band) is at freq 800MHz whereas CDMA1900 (high band) is at 1900MHz. - TX power of CDMA800 is lower than the CDMA1900.
US Cellular is a CDMA network meaning that it uses Code Division Multiple Access as its primary technology. This type of network is different from other networks in its use of a code to differentiate between different conversations instead of using a different frequency for each conversation. US Cellular is not a GSM network which stands for Global System for Mobiles and instead uses CDMA technology. CDMA (Code Division Multiple Access): US Cellular uses this technology as its primary technology. It uses a code to differentiate between different conversations instead of a different frequency for each conversation. GSM (Global System for Mobiles): US Cellular is not a GSM network and instead uses CDMA technology.
Qualcomm, Boost Mobile, MetroPCS, Leap Wireless International Inc., Net 10, Sprint, Verizon, Cricket, and Alltel use CDMA technology.
CDMA technology uses spread spectrum concept thereby giving users unique code to de-spread the information being sent to them. so CDMA is secure and occupies a large bandwidth of information compared to GSM technology.
no mts is 1600mhz cdma but nokia 2112 has only 800mhz cdma technology you can check also
A CDMA repeater is a device that extends the signal range for cell phone providers that use the CDMA technology. CDMA (Code Division Multiple Access) is one of the technologies cell phone companies use for their phone service. More information on CDMA is available here: http://en.wikipedia.org/wiki/CDMA
CDMA technology uses spread spectrum concept thereby giving users unique code to de-spread the information being sent to them. so CDMA is secure and occupies a large bandwidth of information compared to GSM technology.