TY - GEN
T1 - Network massive MIMO for cell-boundary users
T2 - 2012 IEEE Globecom Workshops, GC Wkshps 2012
AU - Lee, Changwoo
AU - Chae, Chan Byoung
AU - Kim, Taehyung
AU - Choi, Sooyong
AU - Lee, Juho
PY - 2012
Y1 - 2012
N2 - In this paper, we propose network massive multiple-input multiple-output (MIMO) systems, where three radio units (RUs) connected via one digital unit (DU) support multiple user equipments (UEs) at a cell-boundary through the same radio resource, i.e., the same frequency/time band. For precoding designs, zero-forcing (ZF) and matched filter (MF) with vector or matrix normalization are considered. We also derive the formulae of the lower and upper bounds of the achievable sum rate for each precoding. Based on our analytical results, we observe that vector normalization is better for ZF while matrix normalization is better for MF. Given antenna configurations, we also derive the optimal switching point as a function of the number of active users in a network. Numerical simulations confirm our analytical results.
AB - In this paper, we propose network massive multiple-input multiple-output (MIMO) systems, where three radio units (RUs) connected via one digital unit (DU) support multiple user equipments (UEs) at a cell-boundary through the same radio resource, i.e., the same frequency/time band. For precoding designs, zero-forcing (ZF) and matched filter (MF) with vector or matrix normalization are considered. We also derive the formulae of the lower and upper bounds of the achievable sum rate for each precoding. Based on our analytical results, we observe that vector normalization is better for ZF while matrix normalization is better for MF. Given antenna configurations, we also derive the optimal switching point as a function of the number of active users in a network. Numerical simulations confirm our analytical results.
UR - http://www.scopus.com/inward/record.url?scp=84875639813&partnerID=8YFLogxK
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U2 - 10.1109/GLOCOMW.2012.6477575
DO - 10.1109/GLOCOMW.2012.6477575
M3 - Conference contribution
AN - SCOPUS:84875639813
SN - 9781467349413
T3 - 2012 IEEE Globecom Workshops, GC Wkshps 2012
SP - 233
EP - 237
BT - 2012 IEEE Globecom Workshops, GC Wkshps 2012
Y2 - 3 December 2012 through 7 December 2012
ER -