The demanding objectives for the future sixth generation (6G) of wireless communication
networks have spurred recent research efforts on novel materials and radio-frequency front …

Quadrature spatial modulation (QSM) is recently proposed to increase the spectral efficiency
(SE) of SM, which extends the transmitted symbols into in-phase and quadrature domains. In …

An efficient physical layer security technique, referred to as OFDM with subcarrier index
selection (OFDM-SIS), is proposed for safeguarding the transmission of OFDM-based …

Using reconfigurable intelligent surfaces (RISs) to improve the coverage and the data rate of
future wireless networks is a viable option. These surfaces are constituted of a significant …

Explores the fundamentals required to understand, analyze, and implement space
modulation techniques (SMTs) in coherent and non-coherent radio frequency environments …

In this paper, we propose a novel framework of low-cost link adaptation for spatial
modulation multiple-input multiple-output (SM-MIMO) systems-based upon the machine …

Multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-
IM), which transmits an OFDM signal with information bits embedded onto multiple …

The existing sub-6 GHz band is insufficient to support the bandwidth requirement of
emerging data-rate-hungry applications and Internet of Things devices, requiring …

This paper provides a comparative study on the performance of different modulation options
for orthogonal frequency division multiplexing (OFDM) in terms of their spectral efficiency …

Sixty years of coherent versus non-coherent tradeoff as well as the twenty years of coherent
versus non-coherent tradeoff in Multiple-Input Multiple-Output (MIMO) systems are surveyed …