An intelligent reflecting surfaces based iterative PhC‐MIMO system for atmospheric optical channels. Issue 1 (24th August 2022)

• Record Type: Journal Article
• Authors: Wang, Yuequan; Zhou, Xiaolin; Wu, Yaoyang; Wang, Han; Li, Yifan; Tian, Pengfei; Xiu, Sirui
• Is Part Of: Microwave and optical technology letters. Volume 65:Issue 1(2023)
• Page Start: 348
• Page End: 355
• Publication Date: 2022-08-24
• Subjects: free space optical -- nonorthogonal multiple access -- optical intelligent reflecting surfaces -- optical wireless communication -- photon counting; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.33442
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: Optical intelligent reflecting surface (IRS) is regarded as a forward‐looking technology to deal with line‐of‐sight limitations in optical wireless communications. This paper proposes an iterative photon counting nonorthogonal multiple access‐multiple‐input–multiple‐output (NOMA‐MIMO) system based on optical IRS. By analyzing the geometric and misalignment losses under turbulence effect in the optical IRS‐based atmospheric channel, we construct the channel fading coefficient matrix of the NOMA‐MIMO system. At the receiver, a novel iterative parallel interference cancellation algorithm based on logarithmic likelihood ratio is developed for signal detection. Through the simulation of bit error rate (BER), the reliability of the proposed system is proved. Quantitatively, the BER performance can achieve 2 × 10 − 5 $2\times {10}^{-5}$ at the − 165 $-165$ dBJ per bit for the scenario of 3 × 5 $3\times 5$ MIMO system. Furthermore, the numerical results of the external information transfer process indicated that the proposed system has a rapid convergence performance.