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What is CDMA2000?
CDMA continues to advance rapidly and its strong performance is indicative of the technology's leading position in the emerging markets for wireless data and voice communications, especially in areas such as Asia and the Americas. CDMA2000TM is a 3G technology that is based on the older IS-95 CDMA standard. International Mobile Telecommunications-2000 (IMT-2000) gives the global standard for wireless communication in the third generation (3G). CDMA2000 satisfies all the service requirements as specified by the IMT-2000 standard for a 3G technology.

About CDMA2000 Technology
CDMA2000 is a family of standards which includes CDMA2000 1X and CDMA2000 1xEV. The first version of CDMA2000 to be deployed is the CDMA2000 1X which can provide double the data rates as compared to cdmaOne, with peak data rates upto 307 kbps and an average data rate of 144 kbps. It uses the same frequency allocations as that of cdmaOne, which is 1.25 MHz per carrier. As a result CDMA2000 is backward compatible with cdmaOne. CDMA2000 1X is an IS-2000 standard.
The CDMA2000 1xEV is the next (Evolutionary) phase of the CDMA2000 standards family. This is divided into CDMA2000 1xEV-DO and CDMA2000 1xEV-DV. The EV-DO standard supports higher speeds for Data Only. This is achieved by allocating a separate carrier for the data traffic. Although CDMA2000 1xEV-DO is backward compatible with cdmaOne, the service provider has to keep aside a carrier for data communications. The separate carrier promises to provide data speeds greater than 2 Mbps under ideal conditions. The CDMA2000 1xEV-DV standard brings back the Data and Voice to a single carrier, at the same time providing higher speeds. By the end of June 2003 the number of CDMA2000 subscribers crossed the 54 million mark.
For further information on CDMA2000, visit www.cdg.org (CDMA Development Group)


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