naa a22 4500 510796125 CHVBK 20180411083337.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11277-012-0510-0 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0510-0 Capacity Analysis of MIMO Group-Broadcast Channels with Time-Division Scheduling [Elektronische Daten] [Wei Xu, Yuan Cao, Chunming Zhao] This paper investigates the ergodic sum capacity for a MIMO group-broadcast channel with time-division scheduling (TDS). In this scheme, the overall user set is divided into subgroups, among which a single user subgroup which maximizes the instantaneous sum capacity will be scheduled at a time. In order to characterize the TDS performance, we first derived an asymptotic bound to the full capacity obtained by dirty paper coding (DPC). This bound is a closed-form expression and performs well for different system configurations. Further concerning practical precoding techniques, we studied its achievable sum capacity by using block-diagonalization (BD) and zero-forcing (ZF) precoding. Based on these results, the achieved scheduling gain by TDS over random scheduling is analyzed. We also compared the scheduling gains under different transmission strategies including DPC, BD, and ZF precoding. The results reveal that TDS provides the largest scheduling gain for the system with ZF precoding. Finally, we also discussed the effect of the group cardinality on the performance of TDS. Numerical results show the tightness of derived capacity bounds and verify the correctness of our analysis. Springer Science+Business Media, LLC., 2012 Sum capacity nationallicence MIMO nationallicence Group-broadcast channels nationallicence Time-division scheduling nationallicence Precoding nationallicence Xu Wei National Mobile Communications Research Laboratory (NCRL), Southeast University, 210096, Nanjing, China aut Cao Yuan School of Electronic and Information Engineering, Beijing Jiaotong University, 100044, Beijing, China aut Zhao Chunming National Mobile Communications Research Laboratory (NCRL), Southeast University, 210096, Nanjing, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1331-1350 0929-6212 68:4<1331 2013 68 11277 https://doi.org/10.1007/s11277-012-0510-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0510-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu Wei National Mobile Communications Research Laboratory (NCRL), Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Cao Yuan School of Electronic and Information Engineering, Beijing Jiaotong University, 100044, Beijing, China aut NATIONALLICENCE 700 1- Zhao Chunming National Mobile Communications Research Laboratory (NCRL), Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1331-1350 0929-6212 68:4<1331 2013 68 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer