Title :
Interference-free multi-user MIMO-OFDM
Author :
Duplicy, Jonathan ; Louveaux, Jérôme ; Vandendorpe, Luc
Author_Institution :
Commun. & Remote Sensing Lab., Univ. Catholique de Louvain, Belgium
Abstract :
A multi-user downlink MIMO-OFDM scheme is considered. Perfect channel knowledge is assumed at the base station and linear processing is used at both the transmit and receive sides. The objective is to optimize the mean BER of the system while satisfying a transmit power constraint and fulfilling each user´s rate. FDMA and SDMA are investigated. We show how the multi-user interference induced by SDMA can be annihilated and exhibit that this multiple access technique should be preferred to FDMA.
Keywords :
MIMO systems; OFDM modulation; error statistics; frequency division multiple access; multiuser channels; space division multiple access; FDMA; SDMA; frequency division multiple access; interference-free MIMO-OFDM; linear processing; mean BER optimization; multiuser downlink MIMO-OFDM; multiuser interference; perfect channel knowledge; space division multiple access; transmit power constraints; Base stations; Bit error rate; Downlink; Frequency division multiaccess; Interference constraints; MIMO; Multiaccess communication; OFDM; Receiving antennas; Transmitters;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1415918
