A family of 3G (third-generation) mobile communication standards that utilize CDMA technology. It was developed as an evolution of the earlier CDMAOne technology and is designed to provide higher data transmission rates and capacity than its predecessor. CDMA2000 is a set of standards that includes multiple variations, each offering different data rates and capabilities. It's used for voice and data communication in mobile networks, enabling features like internet access, multimedia messaging, and more.
Evolution and Standards
CDMA2000 encompasses various standards such as CDMA2000 1x, CDMA2000 EV-DO (Evolution-Data Optimized), and CDMA2000 1xEV-DV (1x Evolution-Data and Voice). These standards played a significant role in developing 3G wireless networks and contributed to expanding mobile communication capabilities.
- EV-DO (Evolution-Data Optimized): A telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access. It supports high data rates and can be deployed alongside a wireless carrier's voice services.
Applications
CDMA2000 is used for voice and data communication in mobile networks, enabling features like internet access, multimedia messaging, and more. It has been adopted by many mobile phone service providers around the world, particularly those previously employing CDMA networks. It is also used on the Globalstar satellite phone network.
- Bandwidth: An EV-DO channel has a bandwidth of 1.25 MHz, the same bandwidth size that IS-95A (IS-95) and IS-2000 (1xRTT) use, though the channel structure is very different.
Technical Features
CDMA2000 uses advanced multiplexing techniques including code-division multiple access (CDMA) as well as time-division multiplexing (TDM) to maximize throughput. These techniques allow for efficient use of the available bandwidth and support high data rates.