TY - GEN
T1 - Multi-cell MMSE precoding in distributed antenna system with pilot contamination
AU - Xiao, Chiyang
AU - Su, Xin
AU - Zeng, Jie
AU - Rong, Liping
AU - Xu, Xibin
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2017/6/28
Y1 - 2017/6/28
N2 - This paper studies the performance of downlink precoding in multi-cell multi-user large-scale distributed antenna system (DAS). Particularly, due to pilot reuse among users in adjacent cells, imperfect channel state information (CSI) is considered. Since the large scale fadings from different antennas to one user may be distinct from each other, it's difficult to jointly estimate the channels from all antennas to the users. Instead, this paper only jointly estimates the downlink channels of the antennas at the same site, thus with the same large scale fading. Based on the analysis of the properties of the estimated channels in large-scale DAS, we propose a multi-cell MMSE precoding scheme which aims to minimize the receiving signal error in one cell and the interference the cell pours to other cells. Simulation results show significant performance gains over traditional single-cell precoding schemes.
AB - This paper studies the performance of downlink precoding in multi-cell multi-user large-scale distributed antenna system (DAS). Particularly, due to pilot reuse among users in adjacent cells, imperfect channel state information (CSI) is considered. Since the large scale fadings from different antennas to one user may be distinct from each other, it's difficult to jointly estimate the channels from all antennas to the users. Instead, this paper only jointly estimates the downlink channels of the antennas at the same site, thus with the same large scale fading. Based on the analysis of the properties of the estimated channels in large-scale DAS, we propose a multi-cell MMSE precoding scheme which aims to minimize the receiving signal error in one cell and the interference the cell pours to other cells. Simulation results show significant performance gains over traditional single-cell precoding schemes.
KW - Large-scale distributed antenna system
KW - downlink precoding
KW - pilot contamination
UR - http://www.scopus.com/inward/record.url?scp=85025841304&partnerID=8YFLogxK
U2 - 10.1109/ICCChinaW.2015.7961574
DO - 10.1109/ICCChinaW.2015.7961574
M3 - Conference contribution
AN - SCOPUS:85025841304
T3 - 2015 IEEE/CIC International Conference on Communications in China - Workshops, CIC/ICCC 2015
SP - 27
EP - 31
BT - 2015 IEEE/CIC International Conference on Communications in China - Workshops, CIC/ICCC 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2015 IEEE/CIC International Conference on Communications in China - Workshops, CIC/ICCC 2015
Y2 - 2 November 2015 through 4 November 2015
ER -