In this paper, we investigate a multiuser MIMO downlink with imperfect channel state
information (CSI) from the physical-layer security provision. In a classical transmitter (Alice) …

Consider a multi-input multi-output (MIMO) channel wiretapped by multiple multi-antenna
eavesdroppers. Assuming imperfect eavesdroppers' channel state information (CSI) at the …

In this paper, we propose a novel physical layer strategy to improve the secrecy
performance of multiuser multiple-input single-output networks. In this strategy, orthogonal …

This study investigates the framework of associating multiple‐input–multiple‐output (MIMO)
beamforming with secure code to achieve unconditional secure communications in the …

In this paper, we study the secure multiantenna transmission with artificial noise (AN) under
imperfect channel state information (CSI) in the presence of spatially randomly distributed …

We consider a low-complexity transceiver design for secure communications of a multiuser
multi-antenna system with an external multi-antenna eavesdropper. We propose to employ …

The artificial noise (AN) scheme is an efficient strategy for enhancing the secrecy rate of a
multiple-input-single-output channel in the presence of a passive eavesdropper, whose …

In this paper, we consider a multiuser downlink wiretap network consisting of one base
station (BS) equipped with AA antennas, NB single-antenna legitimate users, and NE single …

In this paper, we propose general-order transmit antenna selection to enhance the secrecy
performance of multiple-input-multiple-output multieavesdropper channels with outdated …

We address physical layer security in multiple-input-multiple-output (MISO) communications
in the presence of an unknown passive eavesdropper. Beamforming and artificial noise …