資源描述:
《認(rèn)知中繼網(wǎng)絡(luò)中基于頻譜感知的自適應(yīng)功率控制策略》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫。
1、第58卷第1期電訊技術(shù)Vol.58,No.12018年1月TelecommunicationEngineeringJanuary,2018doi:10.3969/j.issn.1001-893x.2018.01.001引用格式:羅麗平,鄭惠琴.認(rèn)知中繼網(wǎng)絡(luò)中基于頻譜感知的自適應(yīng)功率控制策略[J].電訊技術(shù),2018,58(1):1-5.[LUOLiping,ZHENGHuiqin.Adaptivepowercontrolstrategybasedonspectrumsensingforcognitiverelaynetworks[J].T
2、elecommunicationEngineering,2018,58(1):1-5.]*認(rèn)知中繼網(wǎng)絡(luò)中基于頻譜感知的自適應(yīng)功率控制策略**1,21,2羅麗平,鄭惠琴(1.廣西民族大學(xué)信息科學(xué)與工程學(xué)院,南寧530006;2.廣西高校復(fù)雜系統(tǒng)與智能計算重點實驗室,南寧530006)摘要:針對采用聯(lián)合overlay和underlay頻譜共享模式的認(rèn)知中繼網(wǎng)絡(luò),基于頻譜感知結(jié)果和干擾信道條件,提出了自適應(yīng)功率控制策略,從理論上分析了次用戶的中斷概率。通過Monte-Carlo仿真,與單一overlay或underlay頻譜共享模式和固定功率控
3、制方案下次用戶的中斷性能進(jìn)行了比較。仿真結(jié)果表明,采用自適應(yīng)功率控制方案,在相同中斷概率條件下,次用戶對主用戶的干擾概率降低了70%~80%;在相同干擾概率條件下,次用戶的中斷概率降低了1~2個數(shù)量級,頻譜共享性能得到了有效提高。關(guān)鍵詞:認(rèn)知中繼網(wǎng)絡(luò);overlay頻譜共享;underlay頻譜共享;自適應(yīng)功率控制微信掃描二維碼開放科學(xué)(資源服務(wù))標(biāo)識碼(OSID):聽獨家語音介紹與作者在線交流中圖分類號:TN911.4文獻(xiàn)標(biāo)志碼:A文章編號:1001-893X(2018)01-0001-05AdaptivePowerControlStr
4、ategyBasedonSpectrumSensingforCognitiveRelayNetworks1,21,2LUOLiping,ZHENGHuiqin(1.CollegeofInformationScienceandEngineering,GuangxiUniversityforNationalities,Nanning530006,China;2.GuangxiHigherSchoolKeyLaboratoryofComplexSystemsandIntelligentComputing,Nanning530006,China)
5、Abstract:Anadaptivepowercontrolschemeisproposedforthecognitiverelaynetworkswithjointoverlayandunderlayspectrumsharingmodel.Thetransmitpowerofthesecondaryuserisadjustedadaptivelyac-cordingtothespectrumsensingresultsandtheinterferencechannelcondition.Theoutageprobabilityoft
6、hesecondaryuseriscomparedbyMonte-Carlosimulationsbetweenthefixedpowercontrolschemeandpureoverlayorunderlayspectrumsharingschemes.Theresultsshowthat,byemployingtheadaptivepowercontrolstrategy,theinterferenceprobabilityofthesecondaryusertotheprimaryuserisdecreasedby70%~80%u
7、nderthesameoutageprobability.Also,theoutageprobabilityofthesecondaryuserisre-ducedby1~2ordersofmagnitudeunderthesameinterferenceprobability.Thus,theperformanceofthespectrumsharingisimprovedeffectively.Keywords:cognitiverelaynetwork;overlayspectrumsharing;underlayspectrums
8、haring;adaptivepowercontrol1引言增長的無線通信服務(wù)需求與有限的無線頻譜資源之間[1]隨著新一代寬帶無線通信技術(shù)的迅猛發(fā)展,高速的矛盾日益突出。認(rèn)知無線電能夠提供一種