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We consider Mx2 X channels with M+1 antennas at each node. The proposed scheme achieves both the optimal degrees of freedom (DoF) of 2M for the considered channel and the diversity order of 2 simultaneously. The key to achieving them is to design beamformers using interference alignment (IA) scheme with Alamouti codes. Furthermore, the proposed scheme requires 2 symbol extensions. We assume that each...
We consider 2×2 X channels with 2M antennas at each node where each transmitter has local channel state information at transmitter (CSIT) and each receiver has full channel state information at receiver (CSIR). We propose an interference alignment (IA) scheme that achieves both the optimal degrees of freedom (DoF) of 8M/3 and the diversity order of 2 using stacked Alamouti codes. Particularly, the...
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