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Although a full-duplex (FD) communication in K -links MIMO systems suffers from both self-interference and interuser interference, the bidirectional exchange of information between nodes on each of the K -links in FD significantly enhances the capacity of the wireless channel. On the other hand, a half-duplex (HD) communication is not affected by self-interference but faces the interuser interference. In order to take full advantages of the FD and HD communication modes, this article proposes a joint full- and half-duplex (FuHaDu) communication strategy for MIMO interference channels whereby K MIMO links capacity is enhanced, while both self-interference and interuser interference are reduced. Specifically, the proposed joint FuHaDu model is based on Rosen’s gradient projection method for maximising the weighted sum rate (WSR) of optimal transmitter and receiver filters. The computer simulation results show that the joint FuHaDu strategy enhances the spectral efficiency when compared to the purely HD and FD conventional approaches. The results further reveal that channel capacity doubles as the number of antennas is increased from 2 × 2 to 4 × 4 . The most significant capacity performance is noted with the 4 × 3 MIMO configuration for the HD, FD, and FuHaDu strategies.

Joint Full- and Half-Duplex Communication Strategy for MIMO Interference Channels