Precoding has been conventionally considered as an effective means of mitigating or
exploiting the interference in the multiantenna downlink channel, where multiple users are …

With the expanding demand for high data rates and extensive coverage, high throughput
satellite (HTS) communication systems are emerging as a key technology for future …

The intrinsic integration of the nonorthogonal multiple access (NOMA) and reconfigurable
intelligent surface (RIS) techniques is envisioned to be a promising approach to significantly …

A large-scale fully digital receive antenna array can provide very high-resolution direction of
arrival (DOA) estimation, but resulting in a significantly high RF-chain circuit cost. Thus, a …

In this paper, a random frequency diverse array-based directional modulation with artificial
noise (RFDA-DM-AN) scheme is proposed to enhance physical layer security of wireless …

IRS is of low-cost and energy-efficiency and will be a promising technology for the future
wireless communications like sixth generation. To address the problem of conventional DM …

In this paper, a practical wireless transmission scheme is proposed to transmit confidential
messages to the desired user securely and precisely by the joint use of multiple techniques …

Millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems have
been considered as one of the primary candidates for the fifth generation (5G) and beyond …

Recently, directional modulation has become an active research area in wireless
communications due to its security. Unlike existing research work, we consider a multi-beam …

In a multicast scenario, all desired users are divided into K groups. Each group receives its
own individual confidential message stream. Eavesdropper group aims to intercept K …