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In this paper we propose a downlink codebook-based opportunistic interference alignment (OIA) in a three-cell MIMO system. A codebook composed of multiple transmit vector sets is utilized to improve the multiuser selection diversity. The sum rate increases as the size of the codebook grows. In addition, during the user selection, effective channel gain and alignment metric are combined to generate...
In this paper, we propose two kinds of interference alignment (IA) schemes with limited feedback for the two-cell interfering multi-user multiple-input multiple-output multiple access channel (MIMO-MAC). Since IA with limited feedback results in residual interference for the quantization error, more effective schemes are introduced to reduce the residual interference in this paper compared with the...
In this paper, we study the amplify-and-forward (AF) relaying based signaling scheme for the Y channel consisting of three single-antenna users and a two-antenna relay. In such a particular scenario, traditional signal space alignment for network coding (SSA-NC) scheme is not feasible. Moreover, the time division based multi-user multiple-input multiple-output (MU-MIMO) scheme has to rely on time...
We consider the uplink three-cell single-user cellular systems with limited feedback interference alignment (IA). Considering the exchange of channel state information (CSI) between base stations (BSs), IA solution can be done at BSs. Then the indices of the quantized precoding vectors are fed back to users. A joint quantization strategy, which quantizes the precoding vectors for different users jointly,...
In this paper, we propose an iterative interference alignment scheme to improve the sum rate performance of the K-user MIMO interference channel. We design the precoding matrices to minimize the leakage interference. Linear receiver decoding matrices based on the Minimum Mean Square Error (MMSE) criterion are used to further eliminate the interference. Furthermore, the receiver filter is designed not...
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