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The growth of interest in massive MIMO systems is accompanied with hardwarecost and computational complexity. Antenna selection is an efficient approachto overcome this cost-plus-complexity issue which also enhances the secrecyperformance in wiretap settings. Optimal antenna selection requires exhaustivesearch which is computationally infeasible for settings with large dimensions.This paper develops an iterative algorithm for antenna selection in massivemultiuser MIMO wiretap settings. The algorithm takes a stepwise approach tofind a suitable subset of transmit antennas. Numerical investigations depict asignificant enhancement in the secrecy performance.

Iterative Antenna Selection for Secrecy Enhancement in Massive MIMO Wiretap Channels