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In this scheme, the user near from BS is adopted as a friendly relay to improve performance of user far from BS. An energy harvesting\u00a0(EH) technology-based SWIPT is employed at the near user to collect energy which can be used at cooperative stage. Since eavesdropper in the downlink of NOMA system may use successive interference cancellation\u00a0(SIC) technology to obtain the secrecy information of receiver, to tackle this problem, artificial noise\u00a0(AN) is used at the BS to enhance security performance of secrecy information. Moreover, semidefinite relaxation\u00a0(SDR) method and successive convex approximation\u00a0(SCA) technique are combined to solve the above non-convex problem. Simulation results show that in comparison with other methods, our method can effectively reduce the transmitted power of the BS on the constraints of a certain level of the secrecy rates of two users.<\/jats:p>","DOI":"10.1186\/s13638-021-02020-3","type":"journal-article","created":{"date-parts":[[2021,7,3]],"date-time":"2021-07-03T13:02:29Z","timestamp":1625317349000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Physical layer security transmission scheme based on artificial noise in cooperative SWIPT NOMA system"],"prefix":"10.1186","volume":"2021","author":[{"given":"Yong","family":"Jin","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9325-5966","authenticated-orcid":false,"given":"Zhentao","family":"Hu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dongdong","family":"Xie","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guodong","family":"Wu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lin","family":"Zhou","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,7,3]]},"reference":[{"issue":"9","key":"2020_CR1","doi-asserted-by":"publisher","first-page":"3944","DOI":"10.1109\/TCOMM.2017.2709301","volume":"65","author":"Z Wei","year":"2017","unstructured":"Z. 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