Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading
Non-orthogonal multiple access (NOMA) stands as a promising technology with the potential to significantly enhance the performance of forthcoming wireless networks by leveraging its distinctive attributes. This work presents a comprehensive outage analysis of the uplink (UL) and downlink (DL)- NOMA...
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Elsevier
2025-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025001094 |
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| author | Dipinkrishnan R Vinoth Babu Kumaravelu |
| author_facet | Dipinkrishnan R Vinoth Babu Kumaravelu |
| author_sort | Dipinkrishnan R |
| collection | DOAJ |
| description | Non-orthogonal multiple access (NOMA) stands as a promising technology with the potential to significantly enhance the performance of forthcoming wireless networks by leveraging its distinctive attributes. This work presents a comprehensive outage analysis of the uplink (UL) and downlink (DL)- NOMA system under perfect successive interference cancellation (pSIC) and imperfect SIC (iSIC) conditions. The closed-form expressions for outage probability are formulated by considering the Rician fading channel model, and the analysis is performed for different values of the Rician factor (K). A novel approach is proposed to simplify the analysis of Rician fading channels. By approximating the Rician distribution with a Gamma distribution, the closed-form expressions for outage probability are derived, reducing computational complexity. A novel low-complexity power allocation (PA) strategy is introduced to maximize the sum spectral efficiency (SSE) in NOMA systems even in the presence of iSIC. The optimal PA factors show an SSE enhancement of ≈4.14% in DL-NOMA and ≈6.19% in UL-NOMA. The study ensures high accuracy by demonstrating strong alignment between analytical and simulation results. This approach ensures efficient resource utilization and enhances overall system performance. These findings have significant implications for designing and deploying NOMA-based wireless networks, allowing operators to optimize system performance and meet the growing demands of future wireless services. |
| format | Article |
| id | doaj-art-909c478ce74243b9817e67b86dd532ec |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-909c478ce74243b9817e67b86dd532ec2025-01-22T05:43:50ZengElsevierResults in Engineering2590-12302025-03-0125104021Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fadingDipinkrishnan R0Vinoth Babu Kumaravelu1Department of Communication Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore, 632014, Tamil nadu, IndiaCorresponding author.; Department of Communication Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore, 632014, Tamil nadu, IndiaNon-orthogonal multiple access (NOMA) stands as a promising technology with the potential to significantly enhance the performance of forthcoming wireless networks by leveraging its distinctive attributes. This work presents a comprehensive outage analysis of the uplink (UL) and downlink (DL)- NOMA system under perfect successive interference cancellation (pSIC) and imperfect SIC (iSIC) conditions. The closed-form expressions for outage probability are formulated by considering the Rician fading channel model, and the analysis is performed for different values of the Rician factor (K). A novel approach is proposed to simplify the analysis of Rician fading channels. By approximating the Rician distribution with a Gamma distribution, the closed-form expressions for outage probability are derived, reducing computational complexity. A novel low-complexity power allocation (PA) strategy is introduced to maximize the sum spectral efficiency (SSE) in NOMA systems even in the presence of iSIC. The optimal PA factors show an SSE enhancement of ≈4.14% in DL-NOMA and ≈6.19% in UL-NOMA. The study ensures high accuracy by demonstrating strong alignment between analytical and simulation results. This approach ensures efficient resource utilization and enhances overall system performance. These findings have significant implications for designing and deploying NOMA-based wireless networks, allowing operators to optimize system performance and meet the growing demands of future wireless services.http://www.sciencedirect.com/science/article/pii/S2590123025001094Imperfect SIC (iSIC)Non-orthogonal multiple access (NOMA)Probability of outagePower allocation (PA) optimizationSum spectral efficiency (SSE)Throughput |
| spellingShingle | Dipinkrishnan R Vinoth Babu Kumaravelu Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading Results in Engineering Imperfect SIC (iSIC) Non-orthogonal multiple access (NOMA) Probability of outage Power allocation (PA) optimization Sum spectral efficiency (SSE) Throughput |
| title | Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading |
| title_full | Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading |
| title_fullStr | Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading |
| title_full_unstemmed | Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading |
| title_short | Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading |
| title_sort | outage analysis and power optimization in uplink and downlink noma systems with rician fading |
| topic | Imperfect SIC (iSIC) Non-orthogonal multiple access (NOMA) Probability of outage Power allocation (PA) optimization Sum spectral efficiency (SSE) Throughput |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025001094 |
| work_keys_str_mv | AT dipinkrishnanr outageanalysisandpoweroptimizationinuplinkanddownlinknomasystemswithricianfading AT vinothbabukumaravelu outageanalysisandpoweroptimizationinuplinkanddownlinknomasystemswithricianfading |