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We study the achievable degrees of freedom (DoF) of the 3-user multiple-input multiple-output (MIMO) interference channel (IC), with possibly rank-deficient channel matrices. A two-layered linear processing scheme is proposed, with the inner layer zero-forcing part of the interfering links by applying a technique known as change of basis, and the outer layer performing interference alignment for the...
This paper studies the transmit optimization for the K-user Gaussian single-input single-output interference channel (SISO-IC), with the interference treated as Gaussian noise and by applying improper or circularly asymmetric complex Gaussian signaling. The transmit optimization with improper Gaussian signaling involves not only the signal covariance as in the conventional proper or circularly symmetric...
Network multiple input multiple output (MIMO), in which each user is served by all the transmitters within its range of influence, is a promising technology for higher spectral efficiency. However, such performance gain comes at the expense of significant signaling overhead due to the sharing of channel state information (CSI) and transmission data. This paper proposes a truly distributed power allocation...
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