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Considering imperfect successive interference cancelation (i\u2010SIC), we derive analytical expressions for the outage probabilities experienced by the secondary users (SUs) and the system outage probability of the IR\u2010CNOMA system. We also derive the analytical expression for the outage probability of far SUs by considering IR\u2010CNOMA system with MRC. The maximum transmit power constraint of the secondary nodes and the interference threshold constraint of the primary receiver are considered in the analysis. We also evaluate the system throughput of IR\u2010CNOMA network. We also derive outage and throughput expression for the traditional cooperative relaying\u2010based CNOMA system (CR\u2010CNOMA) for the purpose of comparison. We derive analytical expression for the asymptotic outage probability and the asymptotic system outage probabilities of the SUs of IR\u2010CNOMA system. Further, we derive expressions for the optimal power allocation (OPA) factor at the secondary source that minimizes the asymptotic system outage probability of the IR\u2010CNOMA system. Through numerical and simulation investigations, we demonstrate that the system outage probability significantly lowers when the OPA factor is selected based on the criteria outlined in this work. It can be observed from the results that the IR\u2010CNOMA system outperforms the conventional CR\u2010CNOMA system in terms of outage probabilities and throughput. The outage probability is further reduced when IR\u2010CNOMA system with MRC is considered for the far SUs.<\/jats:p>","DOI":"10.1002\/dac.5876","type":"journal-article","created":{"date-parts":[[2024,7,2]],"date-time":"2024-07-02T01:03:36Z","timestamp":1719882216000},"update-policy":"https:\/\/2.zoppoz.workers.dev:443\/https\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Outage and throughput performance analysis of incremental relaying\u2010based underlay cognitive nonorthogonal multiple access networks with maximal ratio combining"],"prefix":"10.1002","volume":"37","author":[{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0009-0000-7662-2787","authenticated-orcid":false,"given":"Archana","family":"P","sequence":"first","affiliation":[{"name":"Department of Electronics and Communication Engineering National Institute of Technology Puducherry  Karaikal India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0009-0000-5186-5715","authenticated-orcid":false,"given":"Griffith Faustina","family":"G","sequence":"additional","affiliation":[{"name":"Department of Electronics and Communication Engineering National Institute of Technology Puducherry  Karaikal India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Harigovindan","family":"V.P","sequence":"additional","affiliation":[{"name":"Department of Electronics and Communication Engineering National Institute of Technology Puducherry  Karaikal India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0000-0003-4399-3885","authenticated-orcid":false,"given":"Babu","family":"A.V","sequence":"additional","affiliation":[{"name":"Department of Electronics and Communication Engineering National Institute of Technology Calicut  Kozhikode India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,7]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1109\/MWC.2017.1700069"},{"key":"e_1_2_10_3_1","unstructured":"Union I.IMT traffic estimates for the years 2020 to 2030. 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