Malicious jamming launched by smart jammers can attack legitimate transmissions, which has been regarded as one of the critical security challenges in wireless communications. With this focus, paper considers use an intelligent reflecting surface (IRS) to enhance anti-jamming communication performance and mitigate interference adjusting elements at IRS. Aiming against a jammer, optimization pro...

For achieving efficient data aggregation and energy supply in Internet of Things, this paper investigates the optimal design for an intelligent reflecting surface (IRS)-aided backscatter sensor network with over-the-air computation (AirComp). To ensure accuracy aggregation, presents a mean-squared error (MSE) minimization problem via jointly optimizing normalization factor, power splitting rati...

Terahertz (THz) communication has been regarded as one promising technology to enhance the transmission capacity of future Internet-of-Things (IoT) users due its ultrawide bandwidth. Nonetheless, major obstacle that prevents actual deployment THz lies in inherent huge attenuation. Intelligent reflecting surface (IRS) and multiple-input-multiple-output (MIMO) represent two effective solutions fo...

Reducing computational complexity is crucial in optimizing the phase shifts of Intelligent Reflecting Surface (IRS) systems since IRS-assisted communication are generally deployed with a large number reflecting elements (REs). This letter proposes low-complexity algorithm, designated as Dimension-wise Sinusoidal Maximization (DSM), to obtain optimal IRS that maximizes sum capacity MIMO network....

Intelligent reflecting surface (IRS) has recently emerged as a promising technology for 6 G wireless systems, due to its capability reconfigure the propagation environment. In this paper, we investigate Rate-Splitting Multiple Access (RSMA) IRS-assisted downlink system, where base station (BS) communicates with single-antenna users help of an IRS. RSMA relies on rate-splitting (RS) at BS and su...

The current literature on intelligent reflecting surface (IRS) focuses optimizing the IRS phase shifts to yield coherent beamforming gains, under assumption of perfect channel state information (CSI) individual IRS-assisted links, which is highly impractical. This work, instead, considers random rotations scheme at in elements only employ without requiring any CSI. CSI then needed base station ...

Both the jammer and eavesdropper pose severe threat to wireless communications due broadcast nature of channels. In this paper, an intelligent reflecting surface (IRS) assisted secure communication system is considered, where a base station (BS) wishes reliably convey information user, in presence both whose transmit informations are not completely known. Specifically, with imperfect third-part...

With the capability of reconfiguring wireless electromagnetic environment, intelligent reflecting surface (IRS) becomes a new paradigm for designing future communication systems. In this paper, we consider optical IRS improving performance visible light (VLC) under multiple-input and multiple-output (MIMO) setting, where mean square error (MSE) IRS-aided MIMO VLC is minimized by jointly transce...