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 …

Directional Modulation (DM) techniques provide wireless communication security against
passive eavesdrop** by means of specific physical layer characteristics. The original …

For multiple-input multiple-output (MIMO) frequency diverse array (FDA) communications,
this paper proposes a frequency offsets index modulation (FOIM) scheme, which conveys …

Orthogonal time frequency space (OTFS) modulation has been proposed to achieve
outstanding performances over delay-Doppler channels in comparison with orthogonal …

Information metasurface has shown great potential in wireless communications owing to its
ability to flexibly control electromagnetic waves. However, it is still a big challenge to achieve …

In this paper, a novel multi-beam transmission scheme is proposed to enhance physical
layer (PHY) security. This scheme utilizes index modulation (IM) based on frequency diverse …

In this paper, we study the beamforming schemes via the novel frequency diverse array
(FDA) on enhancing covert communications performance. We first consider the ideal …

Directional modulation and artificial noise (AN)-based methods have been widely employed
to achieve physical-layer security (PLS). However, these approaches can only achieve …

By resorting to the technology of frequency diverse array (FDA)-based directional
modulation (DM), this paper designs the physical-layer security in system uplink and …

In this paper, we design the physical layer security of a dual-hop spatial modulation system
provided the relay node transmits its own private information. Meanwhile, the quadrature …