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We consider a beamforming game of the transmitters in a two-user multiple-input single-output interference channel using limited feedback and investigate how each transmitter should find a strategy from the quantized channel state information (CSI). In the beamforming game, each transmitter (a player) tries to maximize the achievable rate (a payoff function) via a proper beamforming strategy. With...
In this paper, we propose opportunistic jammer selection in a wireless security system for increasing the secure degrees of freedom (DoF) between a transmitter and a legitimate receiver (say, Alice and Bob). There is a jammer group consisting of jammers among which Bob selects jammers. The selected jammers transmit independent and identically distributed Gaussian signals to hinder the eavesdropper...
In this paper, we show that opportunistic interference alignment (OIA) by receiver selection achieves a total K degrees of freedom (DoF) in a K-user 1 ??A 3 single-input multiple-output (SIMO) interference channel (IC) when the number of receive antennas is three (N_R=3) at each receiver. The concept of OIA is geometrically interpreted on the complex unit sphere when the number of interferers is larger...
In this paper, we propose a practical interference alignment technique based on an opportunistic user selection in a three-user MIMO interference channel where no information is allowed to be shared among transmitters. In the proposed scheme, the user whose interference signals from other transmitters are most aligned with each other is selected at each transmitter. The proposed opportunistic interference...
In this paper, we propose a practical interference alignment technique based on an opportunistic user selection in a three-user 2 ×2 MIMO interference channel where no information is allowed to be shared among transmitters. In the proposed scheme, the user whose interference signals from other transmitters are most aligned with each other is selected at each transmitter. We also investigate optimal...
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