TY - GEN
T1 - Spatial precoding and loading for multi-user mutiple-antenna OFDM systems
AU - Gang, Wu
AU - Choi, Look Law
AU - Yong, Liang Guan
AU - Su, Hu
AU - Shaoqian, Li
PY - 2006
Y1 - 2006
N2 - In this paper we investigated interference presubtraction problems in multi-users downlink channel for multiple-antennas OFDM system, in which the number of users is larger than the number of transmit antennas. We present a new jointly spatial loading and precoding strategy to select reasonably a group of users for each tone on each transmit antenna by maximizing signal to interference and noise ratio (SINR), Then we introduce vector perturbation precoding in order to cancel multi-users interference at transmitter and achieve the maximum capacity or the minimum BER. Compared with conventional channel inversion and regularization channel inversion method, our proposed method has demonstrated a better performance than other methods because of multi-users diversity gain. Moreover, the proposed method would not increase peak-to-average power ratio (PAPR) of systems.
AB - In this paper we investigated interference presubtraction problems in multi-users downlink channel for multiple-antennas OFDM system, in which the number of users is larger than the number of transmit antennas. We present a new jointly spatial loading and precoding strategy to select reasonably a group of users for each tone on each transmit antenna by maximizing signal to interference and noise ratio (SINR), Then we introduce vector perturbation precoding in order to cancel multi-users interference at transmitter and achieve the maximum capacity or the minimum BER. Compared with conventional channel inversion and regularization channel inversion method, our proposed method has demonstrated a better performance than other methods because of multi-users diversity gain. Moreover, the proposed method would not increase peak-to-average power ratio (PAPR) of systems.
UR - http://www.scopus.com/inward/record.url?scp=44449160025&partnerID=8YFLogxK
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U2 - 10.1109/ITST.2006.288920
DO - 10.1109/ITST.2006.288920
M3 - Conference contribution
AN - SCOPUS:44449160025
SN - 0780395867
SN - 9780780395862
T3 - ITST 2006 - 2006 6th International Conference on ITS Telecommunications, Proceedings
SP - 1362
EP - 1365
BT - ITST 2006 - 2006 6th International Conference on ITS Telecommunications, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - ITST 2006 - 2006 6th International Conference on ITS Telecommunications, Proceedings
Y2 - 21 June 2006 through 23 June 2006
ER -