Secure downlink transmission in massive multiple-input multiple-output (MIMO) systems has
sparked great research enthusiasm. However, the secrecy of uplink transmission is equally …

With the coming of the Internet of Things (IoT) and the fifth generation (5G) wireless
communication era, more and more lightweight user equipments (UEs) appear in our life …

In this paper, the achievable secrecy rate of a relay-assisted massive multiple-input multiple-
output (MIMO) downlink is investigated in the presence of a multi-antenna active/passive …

In this paper, secure transmission strategies for the relay-assisted massive multiple-input
multiple-output (MIMO) downlink are investigated by using artificial noise (AN) generation …

In massive multiple-input multiple-output (MIMO) systems, a multi-antenna eavesdropper
could potentially harm the uplink security by channel estimation in the training phase and …

In this letter, we investigate the best antenna placement for eavesdroppers (Eves), who
intend to wiretap information from the legitimate transmitter (Alice). Two configurations of co …

In this paper, we compare the performance of the linear receivers such as maximum-ratio
combining (MRC), zero-forcing (ZF) and minimum mean-square error (MMSE) receivers in …