1998 Candidate Radio Transmission Technologies (RTTs) for IMT-2000

By 30 June 1998, fifteen candidate RTTs for IMT-2000 had been submitted to the ITU: ten for the terrestrial component and five for the satellite component (see Table 1 below). The detailed submissions were all available from the ITU web site at:

http://www.itu.int/imt/2-radio-dev/proposals/index.html

The summaries presented at an Evaluation Workshop held in Seoul, Korea, on 14-15 July 1998, were available at:

http://www.itu.int/imt/2-radio-dev/seoul/

Table 1

1998 Radio Transmission Technology (RTT) Proposals
Proposal	Description	Environment				Source
		Indoor	Pedestrian	Vehicular	Satellite
DECT	Digital Enhanced Cordless Telecommunications	X	X	-	-	ETSI Project (EP) DECT
UWC-136	Universal Wireless Communications	X	X	X	-	USA TIA TR45.3
WIMS W-CDMA	Wireless Multimedia and Messaging Services Wideband CDMA	X	X	X	-	USA TIA TR46.1
TD-SCDMA	Time-Division Synchronous CDMA	X	X	X	-	China Academy of Telecommunication Technology (CATT)
W-CDMA	Wideband CDMA	X	X	X	-	Japan ARIB
CDMA II	Asynchronous DS-CDMA	X	X	X	-	S. Korea TTA
UTRA: W-CDMA	UMTS Terrestrial Radio Access: Wideband CDMA	X	X	X	-	ETSI SMG2
NA: W-CDMA>	North American: Wideband CDMA	X	X	X	-	USA T1P1-ATIS>
cdma2000</small>	<small>Wideband CDMA (IS-95)</small>	X	X	X	<small>-</small>	USA TIA TR45.5l>
<small>CDMA I</small>	<small>Multiband synchronous DS-CDMA</small>	X	X	X	<small>-</small>	<small>S. Korea TTA</small>
SAT-CDMA>	49 LEO sats in 7 planes at 2000 km	-	-	-	X	<small>S. Korea TTA</small>
SW-CDMA	Satellite wideband CDMA	-	-	-	X	ESA
SW-CTDMA	Satellite wideband hybrid CDMA/TDMA	-	-	-	X	ESA
ICO RTT	10 MEO sats in 2 planes at 10390 km	-	-	-	X	<small>ICO Global Communications</small>
Horizons	<small>Horizons satellite system</small>	-	-	-	X	<small>Inmarsat</small>