User privacy protection is considered a critical issue in wireless networks, which drives the demand for various secure information interaction techniques. In this paper, we introduce an intelligent reflecting surface (IRS)-aided security classification communication system, reduces transmit power of base station (BS) by classifying users with different requirements. Specifically, divide into c...

Intelligent reflecting surface (IRS) is a promising new paradigm to achieve high spectral and energy efficiency for future wireless networks by reconfiguring the signal propagation via passive reflection. To reap gains of IRS, channel state information (CSI) essential, whereas estimation errors are inevitable in practice due limited training resources. In this paper, order optimize performance ...

In order to improve the performance of mobile edge computing (MEC) system, intelligent reflecting surface (IRS) has recently been included. This paper investigates computation an IRS-aided MEC where access point services multi-MEC devices by utilizing two distributed IRSs operate a partial offloading strategy. Through collaboratively constructing cooperative passive beamforming at IRSs, central...

This paper investigates a novel intelligent reflecting surface (IRS)-based symbiotic radio (SR) system architecture consisting of transmitter, an IRS, and information receiver (IR). The primary transmitter communicates with the IR at same time assists IRS in forwarding to IR. Based on IRS’s symbol period, we distinguish two scenarios, namely, commensal SR (CSR) parasitic (PSR), where different ...

In this paper, an indoor robot navigation system is investigated, where intelligent reflecting surface (IRS) employed to enhance the connectivity between access point (AP) and robotic users. Both single-user multiple-user scenarios are considered. scenario, one mobile user (MRU) communicates with AP. AP serves MRU static (SRU) employing either non-orthogonal multiple (NOMA) or orthogonal (OMA) ...