Reconfigurable intelligent surface (RIS) is an emerging next-generation technology that can
improve the energy efficiency using multiple low-power passive metasurfaces which reflect …

In this work, we address the problem of a joint robust transmission, reflection and reception
strategy design at an active reconfigurable intelligent surface (RIS)-assisted underlay …

The cognitive radio (CR) network is a promising network architecture that meets the
requirement of enhancing scarce radio spectrum utilization. Meanwhile, reconfigurable …

We consider a linear precoder design for an underlay cognitive radio multiple-input multiple-
output (MIMO) broadcast channel, where the secondary system consisting of a secondary …

In this letter, we investigated the downlink transmission problem of a cognitive radio network
(CRN) equipped with a novel transmissive reconfigurable intelligent surface (TRIS) …

In this paper, we propose an adaptive linear pre-coder design for an underlay cognitive
radio (CR) multiuser MIMO broadcasting system. The proposed adaptive precoder employs …

Inaccurate knowledge of channel state information (CSI) limits the performance offered by
multiple-input multiple-output (MIMO) communications. The design of a MIMO precoder …

This article presents an efficient quasi-optimal sum rate (SR) maximization technique based
on zero-forcing water-filling (ZFWF) algorithm directly applied to cognitive radio networks …

In this paper, we investigate resource allocation algorithm design for intelligent reflecting
surface (IRS)-assisted multiuser cognitive radio (CR) systems. In particular, an IRS is …

This paper advances the design of transmit precoder for a secondary user (SU) coexisting
with a primary user (PU) in multiple-input multiple-output (MIMO) cognitive radio, where the …