TY - GEN
T1 - A graphical model approach to downlink cooperative MIMO systems
AU - Sohn, Illsoo
AU - Lee, Sang Hyun
AU - Andrews, Jeffrey G.
PY - 2010
Y1 - 2010
N2 - We propose a new method for computing transmit beamforming vectors for downlink multicell multiple-input multiple-output (MIMO) networks. The key novelty of the work is the application of graphical model theory to the intercell interference problem. An index restriction beamforming strategy is adopted to mitigate intercell interference, and is implemented with the well-known message-passing algorithm known as belief-propagation. The advantage of combining restricted index beamforming with belief propagation is only local channel information is required, and the computational complexity is lower than competing methods for base station cooperation. Numerical results show that the network throughput of downlink multicell MIMO systems is increased by the proposed cooperative method especially for cell edge users while the computational complexity is kept similar to non-cooperative methods.
AB - We propose a new method for computing transmit beamforming vectors for downlink multicell multiple-input multiple-output (MIMO) networks. The key novelty of the work is the application of graphical model theory to the intercell interference problem. An index restriction beamforming strategy is adopted to mitigate intercell interference, and is implemented with the well-known message-passing algorithm known as belief-propagation. The advantage of combining restricted index beamforming with belief propagation is only local channel information is required, and the computational complexity is lower than competing methods for base station cooperation. Numerical results show that the network throughput of downlink multicell MIMO systems is increased by the proposed cooperative method especially for cell edge users while the computational complexity is kept similar to non-cooperative methods.
UR - http://www.scopus.com/inward/record.url?scp=79551643328&partnerID=8YFLogxK
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U2 - 10.1109/GLOCOM.2010.5684347
DO - 10.1109/GLOCOM.2010.5684347
M3 - Conference contribution
AN - SCOPUS:79551643328
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 -