1. Multiuser MIMO Downlink Beamforming Design Based on Group Maximum SINR Filtering.
- Author
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Yang, Yu-Han, Lin, Shih-Chun, and Su, Hsuan-Jung
- Subjects
ELECTRIC interference ,SIGNAL-to-noise ratio ,SIGNAL processing ,LINE receivers (Integrated circuits) ,MIMO systems ,BEAMFORMING ,MULTIUSER computer systems ,ITERATIVE methods (Mathematics) - Abstract
In this paper, we aim to solve the multiuser multi-input multi-output (MIMO) downlink beamforming problem where one multi-antenna base station broadcasts data to many users. Each user is assigned multiple data streams and has multiple antennas at its receiver. Efficient solutions to the joint transmit-receive beamforming and power allocation problem based on iterative methods are proposed. We adopt the group maximum signal-to-interference-plus-noise-ratio (SINR) filter bank (GSINR-FB) as our beamformer which exploits receiver diversity through cooperation between the data streams of a user. The data streams for each user are subject to an average SINR constraint, which has many important applications in wireless communication systems and serves as a good metric to measure the quality of service (QoS). The GSINR-FB also optimizes the average SINR of its output. Based on the GSINR-FB beamformer, we find an SINR balancing structure for optimal power allocation which simplifies the complicated power allocation problem to a linear one. Simulation results verify the superiority of the proposed algorithms over previous works with approximately the same complexity. [ABSTRACT FROM PUBLISHER]
- Published
- 2011
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