Title :
Multiuser MIMO transceiver strategy for TDD Uplink and downlink in time-varying channel
Author :
Komulainen, Petri ; Latva-aho, Matti
Author_Institution :
Centre for Wireless Commun., Univ. of Oulu, Oulu
fDate :
March 31 2008-April 4 2008
Abstract :
Block diagonalization (BD) is a downlink multiuser multiple-input multiple-output (MIMO) strategy that utilizes transmitter channel state information (CSI). This paper proposes a practical uplink MIMO scheme for time division duplex (TDD) systems to co-exist with BD, so that the CSI of the BD channels is used also in the uplink transmission. It is shown that the precoded pilot symbols are sufficient in both uplink and downlink to satisfy the needs of both transmission and reception. The capacity of the system is analyzed in conjunction with linear receivers in a time-varying fading channel. According to the results the proposed uplink strategy provides capacity gain over non-precoded transmission, without being sensitive to Doppler.
Keywords :
MIMO communication; cellular radio; channel capacity; channel coding; fading channels; multiuser channels; precoding; radio links; time-varying channels; transceivers; TDD downlink; TDD uplink; block diagonalization; cellular radio systems; channel capacity; linear receiver; multiple-input multiple-output strategy; multiuser MIMO transceiver strategy; precoded pilot symbols; time division duplex system; time-varying fading channel; transmitter channel state information; Channel state information; Downlink; Fading; MIMO; Matrix decomposition; Multiaccess communication; Radio transmitters; Receivers; Time-varying channels; Transceivers; Multiuser MIMO; block diagonalization (BD); space division multiaccess (SDMA); time division duplex (TDD);
Conference_Titel :
Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1483-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2008.4518316