Title :
Pre-Equalization for TDD Systems with Imperfect Transceiver Calibration
Author :
Habendorf, René ; Fettweis, Gerhard
Author_Institution :
Vodafone Dept. Mobile Commun. Syst., Tech. Univ. Dresden, Dresden
Abstract :
We investigate nonlinear pre-equalization 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 derivation of minimum mean square error (MMSE) pre- equalization for imperfect transceiver calibration at the base station and the resulting nonreciprocal channels. The performance of the proposed schemes is investigated numerically in both, uncoded and coded transmission.
Keywords :
antenna arrays; mean square error methods; mobile antennas; radio links; radio receivers; radio transmitters; time division multiple access; time division multiplexing; transceivers; MMSE pre-equalization; TDD systems; imperfect transceiver calibration; minimum mean square error; multiple antennas; multiuser system downlink; noncooperative single antenna mobile receivers; nonlinear pre-equalization techniques; nonreciprocal channels; receiver chains; time division duplex system; transmitter chains; Base stations; Calibration; Downlink; Matrix converters; Mobile antennas; Receiving antennas; Reflector antennas; Transceivers; Transmitters; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.288
