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Then, an optimal power allocation algorithm is proposed based on the full channel state information (CSI) among PUs, CUs, and base station (BS). In order to reduce the feedback overhead, another power allocation algorithm is devised based only on the partial CSI, that is, the CSI of BS-PU and the CSI of BS-CUs. Simulation results demonstrate that, compared with the optimal power allocation algorithm, the power allocation algorithm with only the partial CSI can achieve a similar performance with a smaller channel feedback overhead. <\/jats:p>","DOI":"10.1155\/2014\/525062","type":"journal-article","created":{"date-parts":[[2014,1,9]],"date-time":"2014-01-09T21:04:24Z","timestamp":1389301464000},"page":"525062","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Power Allocation in Nonselfish Symbiotic Cognitive Relaying with Partial Channel State Information"],"prefix":"10.1177","volume":"10","author":[{"given":"Peng","family":"Gong","sequence":"first","affiliation":[{"name":"National Key Laboratory of Mechatronic Engineering and Control, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China"},{"name":"Department of Information and Communication Engineering, Inha University, Incheon 402-751, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kai","family":"Ren","sequence":"additional","affiliation":[{"name":"National Key Laboratory of Mechatronic Engineering and Control, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Duk Kyung","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Information and Communication Engineering, Inha University, Incheon 402-751, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2014,1,9]]},"reference":[{"doi-asserted-by":"publisher","key":"B1-2014-525062","DOI":"10.1016\/j.comnet.2006.05.001"},{"doi-asserted-by":"publisher","key":"B2-2014-525062","DOI":"10.1109\/JSAC.2004.839380"},{"doi-asserted-by":"publisher","key":"B3-2014-525062","DOI":"10.1109\/TCOMM.2007.910699"},{"doi-asserted-by":"publisher","key":"B4-2014-525062","DOI":"10.1109\/TWC.2007.06026"},{"doi-asserted-by":"publisher","key":"B5-2014-525062","DOI":"10.1109\/TWC.2009.080485"},{"doi-asserted-by":"publisher","key":"B6-2014-525062","DOI":"10.1109\/TVT.2011.2108672"},{"doi-asserted-by":"publisher","key":"B7-2014-525062","DOI":"10.1109\/JSAC.2008.080118"},{"doi-asserted-by":"publisher","key":"B8-2014-525062","DOI":"10.1109\/ISWPC.2009.4800611"},{"doi-asserted-by":"publisher","key":"B9-2014-525062","DOI":"10.1587\/transcom.E93.B.3207"},{"doi-asserted-by":"publisher","key":"B10-2014-525062","DOI":"10.1109\/DYSPAN.2011.5936240"},{"volume-title":"Proceedings of the European Wireless Conference (EW '11)","author":"Thumar V. 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