Performance analysis of IRS-aided multi-user millimeter wave communications system

Intelligent reflecting surfaces (IRS) have emerged as a promising technology to augment the performance of future wireless communication networks by mitigating the challenges posed by non line-of-sight propagation. This paper presents a comprehensive analysis of a multi-user downlink communication network by incorporating IRS panels. The proposed IRS-assisted system aims to enhance the overall quality of service (QoS) by leveraging the passive reflecting elements to manipulate the wireless propagation environment. The successful implementation of IRS in future wireless communication networks demands optimization at various levels. This paper focuses on analyzing the sum-rate performance of an IRS-assisted multi-user (MU) millimeter wave (mmWave) communication system by exploiting the joint optimization of active and passive beamforming. Specifically, the complex regularized zero forcing (CRZF) based linear precoders is considered for the investigation. This research provides valuable insights into the benefits of joint active and passive beamforming in IRS-assisted multi-user mmWave systems, contributing to the development of efficient and robust wireless communication networks. © The Author(s), under exclusive licence to Bharati Vidyapeeth's Institute of Computer Applications and Management 2023.