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CDMA2000

Cdma2000 specification was developed by the Third Generation Partnership Project 2 (3GPP2) , 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 as cdma2000 provides full backward compatibility with IS-95B. Cdma2000 is not constrained to only the IMT-2000 band, but operators can also overlay acdma2000 1x system, which supports 144 kbps now and data rates up to 307 kbps in the future, on top of their existing cdmaOne network.

CDMA2000 represents a family of technologies that includes CDMA2000 1X and CDMA2000 1xEV.

* CDMA2000 1X can double the voice capacity of cdmaOne networks and delivers peak packet data speeds of 307 kbps in mobile environments.
* CDMA2000 1xEV includes: CDMA2000 1xEV-DO and CDMA2000 1xEV-DV
CDMA2000 1xEV-DO delivers peak data speeds of 2.4Mbps and supports applications such as MP3 transfers and video conferencing.
CDMA2000 1xEV-DV provides integrated voice and simultaneous high-speed packet data multimedia services at speeds of up to 3.09 Mbps.
( 1xEV-DO and 1xEV-DV are both backward compatible with CDMA2000 1X and cdmaOne.)

The world's first 3G (CDMA2000 1X) commercial system was launched by SK Telecom (Korea) in October 2000. Since then, CDMA2000 1X has been deployed in Asia, North and South America and Europe, and the subscriber base is growing at 700,000 subscribers per day. CDMA2000 1xEV-DO was launched in 2002 by SK Telecom and KT Freetel. The commercial success of CDMA2000 has made the IMT-2000 vision a reality.

 

Cdma2000 Technical summary

Frequency band: Any existing band.
Minimum frequency band required: 1x: 2x1.25MHz, 3x: 2x3.75
Chip rate: 1x: 1.2288, 3x: 3.6864 Mcps
Maximum user data rate: 1x: 144 kbps now, 307 kbps in the future 1xEV-DO: max 384 kbps - 2.4 Mbps, 1xEV-DV: 4.8 Mbps.
Frame length: 5ms, 10ms or 20ms
Power control rate: 800 Hz
Spreading factors: 4 ... 256 UL

 

Advantages of CDMA2000
CDMA2000 benefited from the extensive experience acquired through several years of operation of cdmaOne systems. As a result, CDMA2000 is a very efficient and robust technology. Supporting both voice and data, the standard was devised and tested in various spectrum bands, including the new IMT-2000 allocations.

1. Increased Voice Capacity
2. Higher Data Throughput
3. Frequency Band Flexibility
4. Increased Battery Life
5. Synchronization
6. Power Control
7. Soft Hand-off
8. Transmit Diversity
9. Voice and Data Channels
10. Traffic Channel
11. Supplemental Channels
12. Turbo Coding
13. Connectivity to ANSI-41, GSM-MAP, and IP networks
14. Full backward compatibility
15. Improved service multiplexing and QoS management
16. Flexible channel structure in support of multiple services with various QoS and variable transmission rates

 

CDMA2000 Resources:

CDMA2000

WCDMA