TY - GEN
T1 - Sum-rate optimal multi-antenna downlink beamforming strategy based on clique search
AU - Yoo, Taesang
AU - Goldsmith, Andrea
PY - 2005
Y1 - 2005
N2 - We consider a multi-user MIMO downlink system employing zero-forcing beamforming (ZFBF) as a spatial multiplexing strategy, and propose low-complexity user subset selection methods based on a clique (fully connected subgraph) search. The proposed algorithms, maximum weighted clique (MWC)-ZFBF and greedy weighted clique (GWC)-ZFBF, are shown to achieve the asymptotic sum-capacity of MIMO downlink channels as the number of users goes to infinity. Thus, clique search based ZFBF is an appealing strategy in MIMO downlink systems with a large number of users.
AB - We consider a multi-user MIMO downlink system employing zero-forcing beamforming (ZFBF) as a spatial multiplexing strategy, and propose low-complexity user subset selection methods based on a clique (fully connected subgraph) search. The proposed algorithms, maximum weighted clique (MWC)-ZFBF and greedy weighted clique (GWC)-ZFBF, are shown to achieve the asymptotic sum-capacity of MIMO downlink channels as the number of users goes to infinity. Thus, clique search based ZFBF is an appealing strategy in MIMO downlink systems with a large number of users.
UR - http://www.scopus.com/inward/record.url?scp=33846647479&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846647479&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2005.1577903
DO - 10.1109/GLOCOM.2005.1577903
M3 - Conference contribution
AN - SCOPUS:33846647479
SN - 0780394143
SN - 9780780394148
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 1510
EP - 1514
BT - GLOBECOM'05
T2 - GLOBECOM'05: IEEE Global Telecommunications Conference, 2005
Y2 - 28 November 2005 through 2 December 2005
ER -