Large umbrella space antennas are essential for communication, monitoring and observation of Earth and space objects. Despite investigations devoted to space antenna dynamics, the disturbance impulse shape effect on the root mean square error of spacecraft antenna reflecting surface has not been studied. This paper overcomes this gap describing disturbance impulse impact on root mean square err...

The influence of a rigid-wall reflecting surface on aeroacoustic Time-Reversal (TR) is investigated in this work. To this end, a forward simulation of a Gaussian pulse propagation in 2-D computational domain with a uniform mean flow was implemented by numerically solving the Linearised Euler Equations subject to a rigid-wall condition (by setting the normal velocity to zero) at the bottom bound...

Pilot contamination attack (PCA) in a time division duplex wireless communication system is considered, where an eavesdropper (Eve) attacks the reverse pilot transmission phase order to wiretap data transmitted from transmitter, Alice, receiver, Bob. We propose new PCA scheme for Eve, wherein Eve does not emit any signal by itself but uses intelligent reflecting surface (IRS) reflect sent Bob A...

While intelligent reflecting surface (IRS) assisted wireless communication has emerged as an important research paradigm, channel state information (CSI) acquisition remains a critical challenge to design the IRS phase-shifts and yield promised coherent beamforming gains. In this letter, we propose IRS-assisted opportunistic (OBF) scheme under proportional fair scheduling, which does not requir...

In this work, we propose a novel hybrid communication network that utilizes both Full-Duplex (FD) Decode-and-Forward (DF) relay and an Intelligent Reflecting Surface (IRS) to support data transmission over wireless channels. We design the reflecting coefficients at IRS maximize minimum achievable rate of two hops for proposed network. To end, utilize change-of-variables with Semi-Definite Relax...

Optical intelligent reflecting surfaces (OIRS) have the potential to enhance capacity of next generation optical wireless communication systems by re-configuring propagation environment waves. In this work, a submerged OIRS and planar mirror surface (PMS) are used build up non-line sight (NLOS) underwater (UWOC) system. An NLOS UWOC setup, which makes use total internal reflection (TIR) phenome...