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This is the simulation result of System capacity vs The distance between UT and the IRS along the x-axis ZIO.
As you can see this figure, system capacity increase applying IMI cancellation effectively both L1-ball projection method and the L2-ball projection method. It is also observed that the maximum system capacity can be achieved effectively applying the L2-ball projection method than the L1-ball projection method when the IRS is placed in the middle.
This means that as the distance between U_T and IRS, and IRS and U_R increases, the system capacity is limited by divergence effects, but the IRS can compensate for the performance degradation. |