Title :
Channel time variation effects on transmit beamforming in the TDD mode of UMTS
Author :
Andrieux, Guillaume ; Diouris, Jean-Francois ; Wang, Yide
Author_Institution :
IRCCyN, Ecole Polytechnique de l´´Univ. de Nantes, France
Abstract :
In cellular mobile radio systems, transmit beamforming can be used to reduce the interference in the downlink. In a time division duplex (TDD) system with sufficiently short duplex period, the uplink channel estimation can be used to design the downlink beamformer. The purpose of this paper is to analyse the sensitivity of several transmit techniques to the channel variations between uplink and downlink time-slots. This analysis is done using experimental data obtained from real environments.
Keywords :
3G mobile communication; array signal processing; cellular radio; channel estimation; interference suppression; sensitivity analysis; time division multiplexing; TDD mode; UMTS; cellular mobile radio systems; channel time variation effects; downlink beamformer; interference reduction; sensitivity analysis; short duplex period; time division duplex system; time slots; transmit beamforming; transmit techniques; uplink channel estimation; 3G mobile communication; Antenna arrays; Array signal processing; Base stations; Broadband antennas; Channel estimation; Downlink; Fading; Multiple access interference; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1046492
