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An Efficient Algorithm for Zero-Forcing Coordinated Beamforming
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DOI：10.1109/LCOMM.2012.050412.112565.png)
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Abstract
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The problem of beam tracking for zero-forcing coordinated beamforming in multiple-cell time-varying multiple-input multiple-output channels is considered. Based on null-space perturbation theory, an efficient update algorithm for block-diagonalization-based zero-forcing coordinated beam design is proposed and its performance is analyzed. In slowly-varying channels, the proposed algorithm well tracks the zero-forcing beam solution and significantly reduces computational complexity by simply updating beamforming matrices instead of redesigning them with new channel state information at each time step.
Keywords:
Coordinated beamforming
coordinated multipoint
time-varying channels
perturbation theory
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4.4
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1.3W
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2.2W
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