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Semiblind Interference Alignment: A New Framework
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AI
DOI：10.1109/LSP.2016.2540003.png)
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Abstract
En 中文
In this letter, we provide a new framework for semiblind interference alignment (SBIA) in multi-input-single-output broadcast channels (MISO-BC) where the transmitter receives channel feedback from only one receiver (referred to as supernode). The supernode is called so because it has reconfigurable antennas as well as a feedback mechanism to the transmitters. All other receivers neither have reconfigurable antennas nor provide any kind of feedback to the transmitter. We provide a linear precoding scheme using interference alignment (IA) for this new framework for some classes of MISO-BC, and show that the degrees of freedom (DoF) gain is higher than the traditional orthogonal transmission schemes such as time-division-multiple-access (TDMA). Our proposed SBIA can also be applied to the two-user X-channel for which it is DoF-optimal.
Keywords:
Blind interference alignment (IA)
broadcast channels
degrees of freedom (DoF)
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