- IMT-2000
International Mobile Telecommunications-2000 (IMT-2000) is the global standard for third generation (
3G ) wireless communications as defined by theInternational Telecommunication Union .In 1999 ITU approved five radio interfaces for IMT-2000 as a part of the ITU-R M.1457 Recommendation:* "IMT-DS Direct-Sequence"
** also known asW-CDMA orUTRA-FDD , used inUMTS
* "IMT-MC Multi-Carrier"
** also known asCDMA2000 , the successor to2G CDMA (IS-95 )
* "IMT-TD Time-Division"
** This comprises:TD-CDMA (Time Division - Code Division Multiple Access) andTD-SCDMA (Time Division - Synchronous Code Division Multiple Access). Both are standardised by 3GPP inUMTS likeUTRA TDD-HCR (3.84 Mcps, 5 MHz bandwidth,TD-CDMA air interface) andUTRA TDD-LCR (1.28 Mcps, 1.6 MHz bandwidth,TD-SCDMA air interface).
* "IMT-SC Single Carrier"
** also known as EDGE [http://www.itu.int/ITU-D/imt-2000/DocumentsIMT2000/Est-Growth.pdf]
* "IMT-FT Frequency Time"
** also known asDECT On 18 October 2007 The ITU Radiocommunication Assembly took a decision to include WiMAX-derived technology in the framework of the IMT-2000 set of standards as the sixth element:
* "IP-OFDMA TDD WMAN"
** IP-OFDMA TDD WMAN is a specific variant of IEEE 802.16 with specific WiMax profiles.References
External links
* [http://www.itu.int/newsroom/press_releases/2007/30.html ITU Radiocommunication Assembly approves new developments for its 3G standards]
* [http://www.itu.int/home/imt.html ITU home page for IMT-2000]
* [http://www.itu.int/osg/spu/imt-2000/technology.html About Mobile Technology and IMT-2000] A paper by ITU describing the various 3G standards in the IMT-2000 family
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