TY - GEN
T1 - Spectral efficiency enhancement in the multi-user MIMO downlink with partial feedback information
AU - Erlin, Zeng
AU - Shihua, Zhu
AU - Xuewen, Liao
PY - 2006
Y1 - 2006
N2 - In the multi-user multiple-input multiple-output (MIMO) downlink, co-channel interference (CCI) is the dominating impairment of the system performance. When channel state information (CSI) is completely available to the transmitter, a precoder rightly chosen based on the current CSI can effectively suppress CCI, and thus leads to simpler receiver structure. However, design of precoder based on only partial CSI is still an unsolved problem. Focusing on this point, this paper proposes a novel scheme using joint transmission, which completely eliminates CCI for each mobile terminal and thus enables simple and independent single-user signal detection. The proposed scheme requires only the principal right singular vector of each user's channel response matrix as feedback information. With adaptive modulation for each user, the spatial diversity of the MIMO channel can be sufficiently exploited, and therefore higher spectral efficiency attained. Simulation results show that the proposed scheme has better performance for spectral efficiency in either scenario with or without multi-user selection diversity than the existing scheme.
AB - In the multi-user multiple-input multiple-output (MIMO) downlink, co-channel interference (CCI) is the dominating impairment of the system performance. When channel state information (CSI) is completely available to the transmitter, a precoder rightly chosen based on the current CSI can effectively suppress CCI, and thus leads to simpler receiver structure. However, design of precoder based on only partial CSI is still an unsolved problem. Focusing on this point, this paper proposes a novel scheme using joint transmission, which completely eliminates CCI for each mobile terminal and thus enables simple and independent single-user signal detection. The proposed scheme requires only the principal right singular vector of each user's channel response matrix as feedback information. With adaptive modulation for each user, the spatial diversity of the MIMO channel can be sufficiently exploited, and therefore higher spectral efficiency attained. Simulation results show that the proposed scheme has better performance for spectral efficiency in either scenario with or without multi-user selection diversity than the existing scheme.
UR - https://www.scopus.com/pages/publications/39749124168
U2 - 10.1109/ICCCAS.2006.284804
DO - 10.1109/ICCCAS.2006.284804
M3 - 会议稿件
AN - SCOPUS:39749124168
SN - 0780395840
SN - 9780780395848
T3 - 2006 International Conference on Communications, Circuits and Systems, ICCCAS, Proceedings
SP - 933
EP - 937
BT - 2006 International Conference on Communications, Circuits and Systems, ICCCAS, Proceedings - Communication Theory and System
T2 - 2006 International Conference on Communications, Circuits and Systems, ICCCAS
Y2 - 25 June 2006 through 28 June 2006
ER -