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Rate-Splitting to Mitigate Residual Transceiver Hardware Impairments in Massive MIMO Systems. (arXiv:1704.06333v1 [cs.IT])
来源于:arXiv
Rate-Splitting (RS) has recently been shown to provide significant
performance benefits in various multi-user transmission scenarios. In parallel,
the huge degrees-of-freedom provided by the appealing massive Multiple-Input
Multiple-Output (MIMO) necessitate the employment of inexpensive hardware,
being more prone to hardware imperfections, in order to be a cost-efficient
technology. Hence, in this work, we focus on a realistic massive Multiple-Input
Single-Output (MISO) Broadcast Channel (BC) hampered by the inevitable hardware
impairments. We consider a general experimentally validated model of hardware
impairments, accounting for the presence of \textit{multiplicative distortion}
due to phase noise, \textit{additive distortion noise} and \textit{thermal
noise amplification}. Under both scenarios with perfect and imperfect channel
state information at the transmitter (CSIT), we analyze the potential
robustness of RS to each separate hardware imperfection. We analytically assess
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