eprintid: 10054691 rev_number: 20 eprint_status: archive userid: 608 dir: disk0/10/05/46/91 datestamp: 2018-08-24 11:25:19 lastmod: 2021-10-15 22:41:11 status_changed: 2018-08-24 11:25:19 type: article metadata_visibility: show creators_name: Tang, J creators_name: Dai, T creators_name: Cui, M creators_name: Zhang, X creators_name: Shojaeifard, A creators_name: Wong, KK creators_name: Li, Z title: Optimization for Maximizing Sum Secrecy Rate in SWIPT-enabled NOMA Systems ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F46 keywords: NOMA, Erbium, Resource management, Wireless communication, Downlink, Receivers, Communication system security note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: OAPA In this paper, we study secrecy simultaneous wireless information and power transfer (SWIPT) in downlink nonorthogonal multiple access (NOMA) systems comprising a base station (BS), multiple information receivers (IRs), and multiple energy receivers (ERs) that have potential to wiretap the IRs. The goal of this paper is to maximize the sum secrecy rate (SSR) of the system subject to the individual IR’s minimum data rate requirement and the individual ER’s minimum harvested energy requirement. The corresponding problem involves resource allocation via max-min function, which is non-convex and difficult to solve directly. In order to tackle this, we first transform the original non-convex problem to a sequence of convex subproblems which can be solved simultaneously. Hence, a closedform solution of the optimal power allocation policy is derived based on the Karush-Kuhn-Tucker (KKT) conditions. Numerical results validate the theoretical findings and demonstrate that significant performance gain over the orthogonal multiple access (OMA) scheme in terms of SSR can be achieved by the proposed algorithm in a SWIPT-enabled NOMA system. date: 2018-07-26 date_type: published official_url: http://dx.doi.org/10.1109/ACCESS.2018.2859935 oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green article_type_text: Article in Press verified: verified_manual elements_id: 1576823 doi: 10.1109/ACCESS.2018.2859935 lyricists_name: Shojaeifard, Arman lyricists_name: Wong, Kai-Kit lyricists_id: ASHOJ33 lyricists_id: KWONG98 actors_name: Sharp, Catherine actors_id: CLSHA04 actors_role: owner full_text_status: public publication: IEEE Access volume: 6 pagerange: 43440-43449 issn: 2169-3536 citation: Tang, J; Dai, T; Cui, M; Zhang, X; Shojaeifard, A; Wong, KK; Li, Z; (2018) Optimization for Maximizing Sum Secrecy Rate in SWIPT-enabled NOMA Systems. IEEE Access , 6 pp. 43440-43449. 10.1109/ACCESS.2018.2859935 <https://doi.org/10.1109/ACCESS.2018.2859935>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10054691/1/08421218.pdf