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Open Access

On the Performance of Multiuser MIMO in UTRA FDD Uplink

  • Jyri Hämäläinen1, 2Email author,
  • Kari Pajukoski1,
  • Esa Tiirola1,
  • Risto Wichman2 and
  • Juha Ylitalo3
EURASIP Journal on Wireless Communications and Networking20042004:756193

Received: 28 November 2003

Published: 22 December 2004


We study the uplink performance of MIMO systems in UTRA FDD using noise rise and system load as performance measures. Results show that the uplink coverage and capacity of the UTRA FDD mode are significantly improved by SIMO and MIMO techniques that require only minor modifications to existing 3GPP specifications. Receive diversity in base station increases coverage and capacity in a straightforward manner, but the gain from transmit diversity in mobile station is small because of the fast closed-loop power control, which is essential to CDMA uplink performance. However, multiple transmit antennas in the mobile can be used to achieve higher than 2 Mbps single-user data rates.