  This paper studies the massive MIMO full-duplex relaying (MM-FDR), where
multiple source-destination pairs communicate simultaneously with the help of a
common full-duplex relay equipped with very large antenna arrays. Different
from the traditional MM-FDR protocol, a general model where
sources/destinations are allowed to equip with multiple antennas is considered.
In contrast to the conventional MIMO system, massive MIMO must be built with
low-cost components which are prone to hardware impairments. In this paper, the
effect of hardware impairments is taken into consideration, and is modeled
using transmit/receive distortion noises. We propose a low complexity hardware
impairments aware transceiver scheme (named as HIA scheme) to mitigate the
distortion noises by exploiting the statistical knowledge of channels and
antenna arrays at sources and destinations. A joint degree of freedom and power
optimization algorithm is presented to further optimize the spectral efficiency
of HIA based MM-FDR. The results show that the HIA scheme can mitigate the
"ceiling effect" appears in traditional MM-FDR protocol, if the numbers of
antennas at sources and destinations can scale with that at the relay.
