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In our analysis, the closed-form and asymptotic expressions of the outage probability are derived and the achievable coding gain and diversity gain of the system are accurately revealed. Further, based on the asymptotic analysis we propose a power allocation scheme, which can lead to SNR performance gains of more than 1\u2009dB compared to the equal power allocation scheme. Finally, Monte-Carlo simulation results are presented to verify the validity of our theoretical analysis. <\/jats:p>","DOI":"10.1155\/2014\/629348","type":"journal-article","created":{"date-parts":[[2014,1,9]],"date-time":"2014-01-09T21:04:47Z","timestamp":1389301487000},"page":"629348","update-policy":"https:\/\/2.zoppoz.workers.dev:443\/https\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Partial Relay Selection with Feedback Delay and Cochannel Interference: Performance Analysis and Power Optimization"],"prefix":"10.1177","volume":"10","author":[{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0000-0002-5994-9339","authenticated-orcid":false,"given":"Xuanxuan","family":"Tang","sequence":"first","affiliation":[{"name":"College of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weifeng","family":"Mou","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fang","family":"Fang","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yueming","family":"Cai","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weiwei","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/2.zoppoz.workers.dev:443\/https\/orcid.org\/0000-0001-5809-0801","authenticated-orcid":false,"given":"Tao","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2014,1,9]]},"reference":[{"key":"B1-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/JSAC.2005.862417"},{"key":"B2-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2008.071987"},{"key":"B3-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2009.091071"},{"key":"B4-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/LSP.2010.2045544"},{"key":"B5-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2008.071987"},{"key":"B6-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/VETECS.2011.5956495"},{"key":"B7-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/WCNC.2011.5779318"},{"key":"B8-2014-629348","doi-asserted-by":"publisher","DOI":"10.1109\/TVT.2011.2125807"},{"key":"B9-2014-629348","volume-title":"Table of Integrals, Series and Products","author":"Gradshteyn I. 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