Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA System
Recent research has introduced the notion of an Intelligent Reflective Surface (IRS) so as to boost the source–destination communication environment. IRS refers to a plane that consists of a number of passive elements that have a smaller size than the wavelength of the incident signal. Those element...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/11/23/4045 |
| _version_ | 1797463377946083328 |
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| author | Ziad Qais Al-Abbasi Laith Farhan Raad S. Alhumaima |
| author_facet | Ziad Qais Al-Abbasi Laith Farhan Raad S. Alhumaima |
| author_sort | Ziad Qais Al-Abbasi |
| collection | DOAJ |
| description | Recent research has introduced the notion of an Intelligent Reflective Surface (IRS) so as to boost the source–destination communication environment. IRS refers to a plane that consists of a number of passive elements that have a smaller size than the wavelength of the incident signal. Those elements use reflection to beam-form and to forward the incident radio signals toward the intended destination without power consumption. This article examines the performance of an IRS-based non-orthogonal multiple access (NOMA) system, and adopts the idea of using multiple IRS planes. It additionally investigates improving the performance of an IRS-NOMA combination through proposing various solutions that include optimizing the overall number of the IRS elements as a first step. After that, a closed form expression is derived for the considered IRS-NOMA system to determine the optimal number of the reflective elements. Secondly, the paper utilizes a new approach termed as multiple-IRS-based NOMA. This encompasses using multiple reflective planes (multi-IRS) along with IRS-NOMA, to boost the received signal characteristics, especially in situations where it is there a weak or no direct link between the source and the destination. An energy efficiency-spectral efficiency (EE-SE) trade-off is likewise presented, so as to have a complete view of the IRS-NOMA performance, along with the proposed solutions. The obtained simulation results depicts that IRS-NOMA is better than the existing orthogonal techniques. In addition, the results confirm that exploiting multiple IRSs offers a considerable gain in performance, as it enhances the conditions of the propagation environment. In specific, the considered case of a two IRS surfaces-assisted NOMA system offers higher performance levels than the case of a single IRS surface-assisted NOMA system. |
| first_indexed | 2024-03-09T17:49:49Z |
| format | Article |
| id | doaj.art-c99464821e56446aa6ed6952a700b59b |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T17:49:49Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-c99464821e56446aa6ed6952a700b59b2023-11-24T10:49:45ZengMDPI AGElectronics2079-92922022-12-011123404510.3390/electronics11234045Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA SystemZiad Qais Al-Abbasi0Laith Farhan1Raad S. Alhumaima2Middle Technical University (MTU), Baquba Technical Institute, Baghdad 10001, IraqDepartment of Computer, College of Engineering, University of Diyala, Baqubah 32001, IraqDepartment of Communications, University of Diyala, Baqubah 32001, IraqRecent research has introduced the notion of an Intelligent Reflective Surface (IRS) so as to boost the source–destination communication environment. IRS refers to a plane that consists of a number of passive elements that have a smaller size than the wavelength of the incident signal. Those elements use reflection to beam-form and to forward the incident radio signals toward the intended destination without power consumption. This article examines the performance of an IRS-based non-orthogonal multiple access (NOMA) system, and adopts the idea of using multiple IRS planes. It additionally investigates improving the performance of an IRS-NOMA combination through proposing various solutions that include optimizing the overall number of the IRS elements as a first step. After that, a closed form expression is derived for the considered IRS-NOMA system to determine the optimal number of the reflective elements. Secondly, the paper utilizes a new approach termed as multiple-IRS-based NOMA. This encompasses using multiple reflective planes (multi-IRS) along with IRS-NOMA, to boost the received signal characteristics, especially in situations where it is there a weak or no direct link between the source and the destination. An energy efficiency-spectral efficiency (EE-SE) trade-off is likewise presented, so as to have a complete view of the IRS-NOMA performance, along with the proposed solutions. The obtained simulation results depicts that IRS-NOMA is better than the existing orthogonal techniques. In addition, the results confirm that exploiting multiple IRSs offers a considerable gain in performance, as it enhances the conditions of the propagation environment. In specific, the considered case of a two IRS surfaces-assisted NOMA system offers higher performance levels than the case of a single IRS surface-assisted NOMA system.https://www.mdpi.com/2079-9292/11/23/4045intelligent reflective surface (IRS)non-orthogonal multiple access (NOMA)orthogonal multiple access (OMA)energy efficiency (EE)spectral efficiency (SE) |
| spellingShingle | Ziad Qais Al-Abbasi Laith Farhan Raad S. Alhumaima Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA System Electronics intelligent reflective surface (IRS) non-orthogonal multiple access (NOMA) orthogonal multiple access (OMA) energy efficiency (EE) spectral efficiency (SE) |
| title | Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA System |
| title_full | Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA System |
| title_fullStr | Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA System |
| title_full_unstemmed | Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA System |
| title_short | Multiple-Intelligent Reflective Surfaces (Multi-IRSs)-Based NOMA System |
| title_sort | multiple intelligent reflective surfaces multi irss based noma system |
| topic | intelligent reflective surface (IRS) non-orthogonal multiple access (NOMA) orthogonal multiple access (OMA) energy efficiency (EE) spectral efficiency (SE) |
| url | https://www.mdpi.com/2079-9292/11/23/4045 |
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