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Spatial Modulation for Uplink Multi-User mmWave MIMO Systems With Hybrid Structure
IEEE Transactions on Communications ( IF 5.646 ) Pub Date : 2019-10-18 , DOI: 10.1109/tcomm.2019.2948340
Wei Wang; Wei Zhang

Spatial modulation is an efficient transmission scheme for RF-chain limited MIMO systems. In this paper, we design a beam-switching based spatial modulation for mmWave MIMO uplink systems. At user side, a power iteration based algorithm is proposed to generate spatial symbols under the constant modulus constraint. With the generated spatial codebook, the optimal transmission mode is determined. At base station side, a round-robin path selection algorithm is proposed to select paths that are separated in angle of arrival. Inter-user interference is then suppressed by constraining the power of the received spatial symbols over selected paths only. Finally, ordered successive interference cancelation is applied to further reduce interference among users. Numerical results show that the proposed beam-switching based spatial modulation is superior to transmission over the strongest propagation path and is able to yield a satisfactory error performance in mmWave MIMO uplink.
更新日期:2020-01-17

 

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