Information About

Imt-2000

In 1999 ITU approved five radio interfaces for IMT-2000 as a part of the ITU-R M.1457 Recommendation. The five standards are:

''IMT-DS Direct Spread''

--- also known as W-CDMA or UTRA-FDD , used in UMTS

''IMT-MC Multi-Carrier''

--- also known as CDMA2000 , the successor to 2G CDMA ( IS-95 )

''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''

--- also known as UWC

''IMT-FT Frequency Time''

--- also known as DECT

EXTERNAL LINKS

ITU home page for IMT-2000

About Mobile Technology and IMT-2000 A paper by ITU describing the various 3G standards in the IMT-2000 family