TY - GEN
T1 - Limited feedback design for block diagonalization MIMO broadcast channels with user scheduling
AU - Moon, Sung Hyun
AU - Kim, Jin Sung
AU - Lee, Inkyu
PY - 2010
Y1 - 2010
N2 - Block diagonalization (BD) is an attractive method for approaching sum capacity in multiuser multiple-input multiple-output (MIMO) broadcast channels. However, when channel state information (CSI) is limited, the performance of the BD is degraded because inter-user interference cannot be completely eliminated. In this paper, we study limited feedback systems for the BD where a large number of users are supported per cell. Based on an estimate of the received signalto-interference-plus-noise ratio (SINR), we present an efficient feedback scheme which reflects the quality of each user's channel in addition to the use of a quantization codebook. In simulation, we compare the sum rate of the BD scheme under practical scenarios and verify that the proposed SINR feedback is an effective way to exploit multiuser diversity.
AB - Block diagonalization (BD) is an attractive method for approaching sum capacity in multiuser multiple-input multiple-output (MIMO) broadcast channels. However, when channel state information (CSI) is limited, the performance of the BD is degraded because inter-user interference cannot be completely eliminated. In this paper, we study limited feedback systems for the BD where a large number of users are supported per cell. Based on an estimate of the received signalto-interference-plus-noise ratio (SINR), we present an efficient feedback scheme which reflects the quality of each user's channel in addition to the use of a quantization codebook. In simulation, we compare the sum rate of the BD scheme under practical scenarios and verify that the proposed SINR feedback is an effective way to exploit multiuser diversity.
UR - http://www.scopus.com/inward/record.url?scp=79551646968&partnerID=8YFLogxK
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U2 - 10.1109/GLOCOM.2010.5683372
DO - 10.1109/GLOCOM.2010.5683372
M3 - Conference contribution
AN - SCOPUS:79551646968
SN - 9781424456383
T3 - GLOBECOM - IEEE Global Telecommunications Conference
BT - 2010 IEEE Global Telecommunications Conference, GLOBECOM 2010
T2 - 53rd IEEE Global Communications Conference, GLOBECOM 2010
Y2 - 6 December 2010 through 10 December 2010
ER -