International Mobile Telecommunications-2000
) is the global standard for third generation (3G
) wireless communications as defined by the International 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
- IMT-MC Multi-Carrier
- IMT-TD Time-Division
- This comprises: TD-CDMA (Time Division - Code Division Multiple Access) and TD-SCDMA (Time Division - Synchronous Code Division Multiple Access). Both are standardised by 3GPP in UMTS like UTRA TDD-HCR (3.84 Mcps, 5 MHz bandwidth, TD-CDMA air interface) and UTRA TDD-LCR (1.28 Mcps, 1.6 MHz bandwidth, TD-SCDMA air interface).
- IMT-SC Single Carrier
- IMT-FT Frequency Time
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.