Title :
SPC09-5: Reduced Complexity Vector Precoding for the Multiuser Downlink
Author :
Habendorf, Rene ; Riedel, Ines ; Fettweis, Gerhard
Author_Institution :
Vodafone Chair Mobile Commun. Syst., Tech. Univ. Dresden, Dresden
fDate :
Nov. 27 2006-Dec. 1 2006
Abstract :
We investigate nonlinear preceding techniques for the downlink of multi-user systems from a transmitter equipped with multiple antennas to non-cooperative single antenna mobile receivers. The contribution of this paper is the extension of the tree-structured vector precoding algorithm with a search radius estimation based on the statistics of the preceded symbols to reduce the number of evaluated nodes. Simulation results reveal a significant reduction of computational complexity at the expense of only slight performance degradations.
Keywords :
antenna arrays; computational complexity; mobile radio; multi-access systems; precoding; radio receivers; statistical analysis; tree searching; multiple antenna; multiuser downlink system; noncooperative single antenna mobile receiver; nonlinear preceding technique; reduced complexity vector precoding; search radius estimation; statistics; transmitter; tree-structured vector precoding algorithm; Computational complexity; Covariance matrix; Degradation; Downlink; Matrix decomposition; Mobile antennas; Receiving antennas; Symmetric matrices; Transmitters; Transmitting antennas;
Conference_Titel :
Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0356-1
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2006.584
