the results under (AS2) are displayed since the ZF/BD-based
reference scheme requires more transmit antennas at the relays
for the other two antenna settings. The same observations
from Fig. 3 for the case of L = 2 also apply to Fig.
4. These simulation results demonstrate that the proposed
algorithms are able to effectively suppress IRI, SI and MUI
simultaneously and achieve significant transmit power savings
in the considered MIMO FDR network.
An interesting but unanswered question about MIMO FDR
network is, as IRI strength changes, how SI and MUI will
affect the overall performance respectively. In Fig. 5 we