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W-CDMA / UMTS / ITS-2000


Frequency allocations

1885-2025 MHz, 2110-2200 MHz

North America            
  | | | | |
  1800 1900 2000 2100 2200
Key:   G3     MSS     other

Radio Specifications

ITU (International Telecommunications Union) ITM-2000
    minimum data rates:
  • 144 kb/sec vehicular
  • 384 kb/sec pedestrian
  • 2 Mb/sec non-mobile
1880-1980 IMT-2000; 1980-2010 MSS (satellite); 2010-2025 MSS reg2; 2110-2160 IMT-2000; 2160-2170 MSS Reg2; 2170-2200 MSS

North America:
TIA (Telecommunications Industry Association)TR-45 subcommittee
1850-1990 PCS; 1990-2025 MSS; 2160-2200 MSS
spectrum: unsure if FCC will allocate any; use present 1900 MHz specturm?

Wideband cdmaOne
5 MHz BW.
Data rates to 2 Mbps
needs to be backwards compatible with 1G (AMPS ANSI-41) and 2G (IS-95 CDMA)

UWCC (Universal Wireless Communications Consortium) 3G TDMA (IS-136 compatible)
240 kHz BW(?)

others: possible TR-46 based GSM standard, more

ETSI SMG subgroup
1805-1880 (GSM); 1880-1900 DECT; 1900-1920 UMTS DECT; 1920-1980 UMTS; 1980-2010 MSS; 2110-2170 UMTS; 2170-2200 MSS
spectrum allocated

UMTS (Universal Mobile Telecommunications System)/WCDMA (Wideband Code Division Multiple Access) (Nokia, Ericsson, Telecom Finland, Telecom Italia Mobile)
compatible with NTT DoCoMo
UMTS has a FRAMES approach and uses a different numerology and techniques than Wideband cdmaOne.
access method: DS-CDMA, FDD

    (Ericsson demo)
  • base tx:2110-2130 rx: 1920-1940
  • carrier BW: 5 MHz
  • Number of carriers: 2/sector
  • number odf sectors: 6/BTS
  • Average Power max: 20 W /sector
  • chip rate: 4096 Mcps
  • frame length: 10 ms
  • BTS power control: 20 dB control range
  • 1 dB control step
  • 0.625 ms control cycle

    vs 1.25 MHz BW CDMA:
  • wider channel for better frequency diversity, reduced fading problems, better statistical averaging effects coherent demodulation in the uplink improves coverage
  • improved power control, due to faster acontrol and less fading effects in wider channel
  • built in support for adaptive antenna arrays; multi-user detection; hierarchical cell structures; independance from GPS (no synchronization)

TD/CDMA (Siemens, Alcatel, ItalTel, Nortel, Bosch, Motorola, Sony)
hybrid system employing both TDMA and CDMA

ARIB (Association of Radio Businesses)
1895-1920 PHS; 1920-1980 3g gen; 1980-2010 MSS; 2110-2170 3d gen; 2170-2200 MSS
spectrum allocated

NTT DoCoMo (NTT, Japan Telecom)
5 MHz BW.
Mixed services from 8 kbps to 2 Mbps

Wideband cdmaOne


List of Standards

link EIA PN-3502- W CDMA (Wideband Code Division Multiple Access) Air Interface Compatibility Standard for 1.85 1.99 GHz PCS Applications

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this page last updated: 1 October 1999