Abstract:With the presence of perfect channel state information (CSI), the achievable degrees of freedom (DoF) in wireless interference networks can be linearly scaled up with the number of users. Achievability is based on the idea of interference alignment (IA). However, with the presence of imperfect CSI, the sum rate becomes degraded and full DoF may not be achievable anymore. In this paper and by considering a generalized CSI mismatch model, we propose a novel MMSE-based IA scheme such that the unitary beamformers … Show more
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