發(fā)布時(shí)間：2018-04-11 17:07

  本文選題：中繼協(xié)作 + 能效�。� 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：認(rèn)知無線電網(wǎng)絡(luò)(CRN)中的動(dòng)態(tài)頻譜共享技術(shù)是有效解決頻譜資源利用率低下的關(guān)鍵技術(shù),而綠色通信強(qiáng)調(diào)節(jié)省能源和保護(hù)環(huán)境的理念,追求以較小能耗獲得較大吞吐量,因此以能效為目標(biāo)實(shí)現(xiàn)綠色頻譜共享受到了研究者的廣泛關(guān)注。基于中繼協(xié)作的頻譜共享技術(shù)是一種雙贏模式,該技術(shù)一方面可以提高主用戶(PU)的傳輸可靠性和穩(wěn)定性,另一方面使認(rèn)知用戶(SU)獲得了接入授權(quán)頻譜的機(jī)會(huì)。本文從能效角度研究基于中繼協(xié)作的頻譜共享技術(shù),綜合考慮吞吐量和能耗,提出以最大化認(rèn)知系統(tǒng)加權(quán)總能效為目標(biāo)的綠色頻譜共享算法(GSS)來解決功率分配和頻譜共享時(shí)間的分配問題。與傳統(tǒng)解決能效問題的分?jǐn)?shù)規(guī)劃算法相比,GSS算法在進(jìn)行認(rèn)知用戶功率分配的同時(shí),有效地解決了協(xié)作頻譜共享時(shí)間的分配問題,且本文提出的GSS算法采用基于認(rèn)知系統(tǒng)加權(quán)總能效的最佳中繼選擇策略,選出最佳中繼集合協(xié)助主用戶進(jìn)行傳輸,在滿足主用戶QoS需求的條件下使協(xié)作中繼獲得了比其它中繼集合更高的加權(quán)總能效。最后仿真結(jié)果驗(yàn)證了GSS算法使認(rèn)知系統(tǒng)能效得到了提升,從而說明了GSS算法的合理性和有效性。
[Abstract]:The dynamic spectrum sharing technology in CRN (Cognitive Radio Network) is the key technology to solve the problem of low utilization of spectrum resources. Green communication emphasizes the idea of saving energy and protecting the environment, and seeks to achieve greater throughput with less energy consumption.Therefore, the goal of energy efficiency to achieve green spectrum sharing has been widely concerned by researchers.The spectrum sharing technology based on relay collaboration is a win-win mode. On the one hand, it can improve the transmission reliability and stability of the primary user (PUU); on the other hand, the cognitive user can gain access to the authorized spectrum.This paper studies the spectrum sharing technology based on relay collaboration from the perspective of energy efficiency, considering the throughput and energy consumption.A green spectrum sharing algorithm (GSS) aiming at maximizing weighted total energy efficiency of cognitive systems is proposed to solve the problem of power allocation and spectrum sharing time allocation.Compared with the traditional fractional programming algorithm to solve the problem of energy efficiency, the GSS algorithm not only performs power allocation for cognitive users, but also effectively solves the allocation problem of cooperative spectrum sharing time.The proposed GSS algorithm adopts the optimal relay selection strategy based on the weighted total energy efficiency of cognitive system, and selects the best relay set to assist the primary user in the transmission.Under the condition of satisfying the QoS requirement of the primary user, the cooperative relay can achieve higher weighted total energy efficiency than the other relay sets.Finally, the simulation results show that the efficiency of cognitive system is improved by GSS algorithm, which shows the rationality and effectiveness of GSS algorithm.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN925

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 閆盛楠;基于協(xié)作的認(rèn)知無線電頻譜共享技術(shù)研究[D];北京郵電大學(xué);2011年

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本文編號(hào)：1736896