帶內(nèi)全雙工OFDMA網(wǎng)絡(luò)資源分配研究
發(fā)布時間：2018-10-05 16:08
【摘要】：無線通信業(yè)務(wù)爆炸式增長與頻譜資源短缺之間的外在矛盾,驅(qū)動著無線通信理論與技術(shù)的內(nèi)在變革。提升FDD與TDD的頻譜利用效率,并消除對頻譜資源使用和管理方式的差異性,成為未來移動通信技術(shù)革新的目標(biāo)之一。帶內(nèi)全雙工(In-Band Full-Duplex,IBFD)無線通信系統(tǒng)因其支持每一時隙使用相同頻率進(jìn)行收發(fā)通信的特點,被視作一種極具吸引力的解決方案。帶內(nèi)全雙工OFDMA網(wǎng)絡(luò)能夠提供比較高的頻譜利用效率,同時有效的資源分配方案能夠進(jìn)一步提升網(wǎng)絡(luò)性能。本文針對帶內(nèi)全雙工OFDMA網(wǎng)絡(luò)的資源分配問題展開研究,提出了兩種適應(yīng)不同網(wǎng)絡(luò)結(jié)構(gòu)的資源分配算法,以解決網(wǎng)絡(luò)中載波與功率分配、上下行用戶匹配等問題。首先針對基站與用戶在同一子載波進(jìn)行雙向全雙工無線通信的OFDMA網(wǎng)絡(luò),提出最大化網(wǎng)絡(luò)傳輸速率的關(guān)于子載波和功率分配的優(yōu)化問題。在約束條件下,利用拉格朗日乘子法和KKT條件求出了此問題最優(yōu)解的必要條件。根據(jù)最優(yōu)載波分配和功率分配滿足的必要條件,提出一種子載波與功率聯(lián)合分配算法。該算法分為三個步驟:首先利用功率注水算法預(yù)先給各個用戶分配功率預(yù)估傳輸速率;利用修正匈牙利算法和預(yù)估速率分配子載波;最后在子載波分配結(jié)果的基礎(chǔ)上再利用功率注水算法分配合適的功率以最大化傳輸速率。仿真結(jié)果表明,與對比算法相比,本文所提出的子載波與功率聯(lián)合分配算法提升了網(wǎng)絡(luò)總傳輸速率,并且使得用戶間的公平性更好。另一方面,在一對上下行用戶和基站在同一子載波進(jìn)行三節(jié)點帶內(nèi)全雙工通信的OFDMA網(wǎng)絡(luò)中,除了殘余自干擾,節(jié)點間干擾也是需要考慮的問題。本文針對此網(wǎng)絡(luò)中的上下行用戶匹配與子載波分配問題提出了一種基于三維匹配的上下行用戶匹配與子載波分配算法;同時針對上行鏈路傳輸速率的約束條件,提出一種功率分配方法,降低殘余自干擾對系統(tǒng)性能的影響。本文還分析了此算法的收斂性和算法復(fù)雜度,并仿真比較了窮舉法、隨機(jī)分配和此算法的網(wǎng)絡(luò)性能。仿真結(jié)果表明,此算法接近最優(yōu)算法的性能,并且算法復(fù)雜度較低,不僅能比較好解決上下行用戶匹配與子載波分配問題,而且利用功率分配滿足了上行傳輸速率約束。最后,總結(jié)全文的帶內(nèi)全雙工OFDMA網(wǎng)絡(luò)資源分配有關(guān)的研究內(nèi)容及本文研究的不足,并展望了帶內(nèi)全雙工無線通信未來的研究方向。
[Abstract]:The external contradiction between the explosive growth of wireless communication services and the shortage of spectrum resources drives the internal transformation of wireless communication theory and technology. To improve the efficiency of spectrum utilization between FDD and TDD and to eliminate the differences in the use and management of spectrum resources has become one of the targets of future mobile communication technology innovation. In-band full-duplex (In-Band Full-Duplex,IBFD) wireless communication system is regarded as an attractive solution because of its ability to transmit and receive each time slot using the same frequency. In-band full-duplex OFDMA networks can provide high spectral efficiency and efficient resource allocation schemes can further improve the network performance. In this paper, the resource allocation problem of full-duplex OFDMA network in band is studied, and two resource allocation algorithms are proposed to solve the problems of carrier and power allocation, uplink and downlink user matching and so on. Firstly, for the OFDMA network in which the base station and the user perform two-way full-duplex wireless communication in the same sub-carrier, the optimization of sub-carrier and power allocation to maximize the transmission rate of the network is proposed. The necessary conditions for the optimal solution of the problem are obtained by using the Lagrange multiplier method and the KKT condition under the constraint conditions. According to the necessary conditions of optimal carrier allocation and power allocation, a joint subcarrier and power allocation algorithm is proposed. The algorithm is divided into three steps: firstly, power injection algorithm is used to pre-assign power to each user to estimate transmission rate, and modified Hungarian algorithm and predictive rate are used to allocate subcarriers. Finally, based on the subcarrier allocation results, the power injection algorithm is used to allocate the appropriate power to maximize the transmission rate. Simulation results show that the proposed joint subcarrier and power allocation algorithm improves the total transmission rate of the network and makes the fairness between users better than the contrast algorithm. On the other hand, in the OFDMA network where a pair of uplink and downlink users and base stations communicate with each other in the same sub-carrier, in addition to residual self-interference, inter-node interference is also a problem to be considered. In this paper, a 3D matching algorithm for uplink and downlink user matching and subcarrier allocation is proposed for the uplink and downlink user matching and sub-carrier allocation problem, and the constraints of uplink transmission rate are also discussed. A power allocation method is proposed to reduce the influence of residual self-interference on system performance. The convergence and complexity of the algorithm are analyzed, and the network performance of exhaustive method, random assignment method and this algorithm are simulated and compared. Simulation results show that the algorithm is close to the performance of the optimal algorithm, and the complexity of the algorithm is low, which can not only solve the problem of uplink and downlink user matching and sub-carrier allocation, but also satisfy the uplink transmission rate constraint by power allocation. At last, the paper summarizes the research contents of the full duplex OFDMA network resource allocation and the deficiency of this paper, and looks forward to the future research direction of the full duplex wireless communication in the band.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5
本文編號：2254021
[Abstract]:The external contradiction between the explosive growth of wireless communication services and the shortage of spectrum resources drives the internal transformation of wireless communication theory and technology. To improve the efficiency of spectrum utilization between FDD and TDD and to eliminate the differences in the use and management of spectrum resources has become one of the targets of future mobile communication technology innovation. In-band full-duplex (In-Band Full-Duplex,IBFD) wireless communication system is regarded as an attractive solution because of its ability to transmit and receive each time slot using the same frequency. In-band full-duplex OFDMA networks can provide high spectral efficiency and efficient resource allocation schemes can further improve the network performance. In this paper, the resource allocation problem of full-duplex OFDMA network in band is studied, and two resource allocation algorithms are proposed to solve the problems of carrier and power allocation, uplink and downlink user matching and so on. Firstly, for the OFDMA network in which the base station and the user perform two-way full-duplex wireless communication in the same sub-carrier, the optimization of sub-carrier and power allocation to maximize the transmission rate of the network is proposed. The necessary conditions for the optimal solution of the problem are obtained by using the Lagrange multiplier method and the KKT condition under the constraint conditions. According to the necessary conditions of optimal carrier allocation and power allocation, a joint subcarrier and power allocation algorithm is proposed. The algorithm is divided into three steps: firstly, power injection algorithm is used to pre-assign power to each user to estimate transmission rate, and modified Hungarian algorithm and predictive rate are used to allocate subcarriers. Finally, based on the subcarrier allocation results, the power injection algorithm is used to allocate the appropriate power to maximize the transmission rate. Simulation results show that the proposed joint subcarrier and power allocation algorithm improves the total transmission rate of the network and makes the fairness between users better than the contrast algorithm. On the other hand, in the OFDMA network where a pair of uplink and downlink users and base stations communicate with each other in the same sub-carrier, in addition to residual self-interference, inter-node interference is also a problem to be considered. In this paper, a 3D matching algorithm for uplink and downlink user matching and subcarrier allocation is proposed for the uplink and downlink user matching and sub-carrier allocation problem, and the constraints of uplink transmission rate are also discussed. A power allocation method is proposed to reduce the influence of residual self-interference on system performance. The convergence and complexity of the algorithm are analyzed, and the network performance of exhaustive method, random assignment method and this algorithm are simulated and compared. Simulation results show that the algorithm is close to the performance of the optimal algorithm, and the complexity of the algorithm is low, which can not only solve the problem of uplink and downlink user matching and sub-carrier allocation, but also satisfy the uplink transmission rate constraint by power allocation. At last, the paper summarizes the research contents of the full duplex OFDMA network resource allocation and the deficiency of this paper, and looks forward to the future research direction of the full duplex wireless communication in the band.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5
【參考文獻(xiàn)】
相關(guān)期刊論文 前6條
1 本刊訊;;IMT-2020(5G)推進(jìn)組發(fā)布5G技術(shù)白皮書[J];中國無線電;2015年05期
2 王蒙蒙;芮賢義;;全雙工MIMO中繼的自干擾抑制[J];信號處理;2014年06期
3 王俊;趙宏志;卿朝進(jìn);唐友喜;;同時同頻全雙工場景中的射頻域自適應(yīng)干擾抵消[J];電子與信息學(xué)報;2014年06期
4 徐強(qiáng);全欣;潘文生;邵士海;唐友喜;;同時同頻全雙工LTE射頻自干擾抑制能力分析及實驗驗證[J];電子與信息學(xué)報;2014年03期
5 董召軍;;淺談FDD LTE與TDD LTE的區(qū)別[J];信息通信;2014年01期
6 張志亮;羅龍;邵士海;潘文生;沈瑩;唐友喜;;ADC量化對同頻全雙工數(shù)字自干擾消除的誤碼率性能分析[J];電子與信息學(xué)報;2013年06期
相關(guān)碩士學(xué)位論文 前2條
1 韓明超;基于單天線架構(gòu)自適應(yīng)干擾消除技術(shù)的全雙工通信系統(tǒng)研究與實現(xiàn)[D];北京郵電大學(xué);2015年
2 安鵬;單頻全雙工MIMO系統(tǒng)的數(shù)字域仿真分析[D];西安電子科技大學(xué);2014年
，本文編號：2254021
本文鏈接：http://sikaile.net/kejilunwen/xinxigongchenglunwen/2254021.html
最近更新
教材專著
