The CDMA world is facing its next decisive step: the introduction of CDMA2000 1X, handling packet data rates of up to 307.2 kbit/s. The future-oriented measurement platform Universal Radio Communication Tester R&S CMU200 from Rohde & Schwarz also supports this third-generation (3G) mobile radio standard. Since the launch of the first commercial cdma One network in Hong Kong in September 1995, CDMA has established itself worldwide as a mobile radio standard. Now the CDMA world is entering a new and decisive phase, the introduction of CDMA2000 1X.
CDMA2000 specification was developed by the Third Generation Partnership Project 2 (3G PP2), a partnership consisting of five telecommunications standards bodies: ARIB and TTC in Japan, CWTS in China, TTA in Korea and TIA in North America. Cdma2000 has already been implemented to several networks as an evolutionary step from cdmaOne.
The evolution of cdma2000 1x is labeled cdma2000 1xEV. 1xEV will be implemented in steps: 1xEV-DO and 1xEV-DV. 1xEV-DO stands for "1x Evolution Data Only". 1xEV-DV stands for "1x Evolution Data and Voice". Both 1xEV cdma2000 evolution steps will use a standard 1.25 MHz carrier. 1xEV-DO probably will be available for cdma2000 operators during 2002 and 1xEV-DV solutions will be available approximately late 2003 or early 2004.
Cdma2000 1x EV-DO and cdma2000 3x are an ITU-approved, IMT-2000 (3G) standards. Cdma2000 3x is part of what the ITU has termed IMT-2000 CDMA MC (Multi Carrier). It uses less that 5 MHz spectrum (3x 1.25 MHz channels) to give speeds of over 2 Mbps. Cdma2000 1x with lower data speed is considered to be a 2.5G technology.
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