發(fā)布時間：2018-06-30 08:05

  本文選題：多層異構網絡 + 高效傳輸��； 參考：《東南大學》2016年博士論文

【摘要】：在第四代移動通信系統商用之后,下一代移動通信系統成為了學術界研究的熱點,尤其是下-代移動通信在峰值速率、用戶體驗速率、移動性、端到端時延、連接數密度、流量密度等方面所提出的新要求。為了適應這些要求,有必要在現有通信系統中引入低復雜度波束成型技術、大規(guī)模天線技術、全雙工技術、多層異構網絡技術、干擾管理技術以及無線攜能傳輸技術等一系列新技術。本論文深入研究了“多層異構無線通信網絡中的高效傳輸方案研究”這一課題,針對含中繼、小小區(qū)、設備到設備(Device-to-Device, D2D)通信的多層異構網絡,考慮天線選擇、全雙工、無線攜能傳輸等問題,研究了多層異構無線通信網絡中的高效傳輸方案并進行了性能分析。本論文研究的內容包括Nakagami-m信道下雙向中繼天線選擇及性能分析,基于全雙工的雙向中繼天線選擇及性能分析,中繼增強型無線攜能傳輸系統高效傳輸方案研究,基于干擾消除技術的異構網絡性能分析,基于干擾消除技術的中繼增強型異構網絡性能分析,D2D系統中帶服務質量(Quality-of-Service,QoS)約束的多天線選擇及性能分析。具體研究內容和主要貢獻如下：1.針對雙向多天線放大轉發(fā)和譯碼轉發(fā)中繼系統中的天線選擇問題,提出了基于最大最小準則的天線選擇方案,并研究了在所提方案的情況下雙向中繼系統的性能。首先推導了所提方案中接收端信噪比的概率密度函數和累計密度函數,在此基礎上推導了系統中斷概率和平均誤碼率的閉合表達式。通過推導和仿真可以看出,所提的天線選擇方案可以達到滿分集增益。為了進一步提升系統的頻譜效率,我們提出了一種混合天線選擇方案。數值仿真結果顯示了所提方案相對于原有方案的性能優(yōu)勢。2.針對雙向大規(guī)模天線全雙工中繼系統,提出了一種基于最大最小準則的天線選擇方案,并分析了采用所提方案時系統的性能。首先推導了終端用戶的接收信噪比概率密度函數的近似表達式,以及系統中斷概率的閉合表達式。同時研究了當天線數目趨近無窮時的漸進表達式。仿真結果表明，，所做的理論分析能夠有效的反映系統的可靠性,特別是在發(fā)送信噪比比較大時更加精確。3.針對無線攜能中繼傳輸系統,分別提出了兩跳譯碼轉發(fā)攜能中繼系統的時隙分配方案和雙向放大轉發(fā)中繼中的天線選擇方案,并研究了所提方案對系統性能的影響。首先針對兩跳譯碼轉發(fā)系統中繼端能量獲取問題,推導了接收信號的累積密度函數,并得到了系統中斷概率的漸進表達式,給出了中斷概率、能量傳輸時隙和功率劃分因子之間的關系,并提出了基于服務質量的時隙分配方案。然后針對雙向放大轉發(fā)系統用戶端能量獲取問題,基于最優(yōu)接收信噪比、最優(yōu)接收能量以及加權中繼選擇準則給出了三種中繼選擇方案。所提方案在保證系統傳輸質量的同時也保證了無線充電節(jié)點的能量需求。4.針對異構網絡下行鏈路中的干擾問題,以降低宏基站到小小區(qū)的干擾為準則提出了基站端干擾消除算法,并分析了采用此種方案后異構網絡下行鏈路的整體性能。首先推導了宏基站和小小區(qū)用戶接收端信噪比的概率密度函數和分布函數。在此基礎上,得到了系統整體中斷概率的閉合表達式。理論推導和仿真結果表明,干擾消除方案能夠有效提升異構蜂窩網絡的整體性能。5.針對多層異構網絡下行鏈路,同時考慮宏基站直接傳輸和中繼輔助傳輸,在宏基站端提出了干擾消除算法來消除宏基站對于小小區(qū)用戶的干擾。通過理論推導得到了宏基站用戶和小小區(qū)用戶接收信噪比的概率密度函數和累計密度函數,并且給出了系統中斷概率和平均誤碼率的閉合表達式。通過理論推導可以看出,小小區(qū)用戶的信噪比增益來源自宏基站側對于跨層干擾的消除。所以干擾消除能夠有效改善小小區(qū)的性能,而系統整體性能也因此得到改善。數值仿真結果驗證了理論推導的結論。6.針對D2D通信系統,研究了基站端多天線選擇問題,分析了該D2D系統的整體性能,并提出了基于系統服務質量的多天線選擇算法。首先針對基站內的激活用戶和D2D用戶分別推導了概率密度函數和累積密度函數,進而得到了D2D系統的整體中斷概率。基于推導結果,提出了基于服務質量約束的多天線選擇方案來進一步提高基站端的能效,其中所需的天線數根據服務質量約束和發(fā)送信噪比來確定。最后通過仿真驗證了所做推導的正確性,以及展示了所提方案相對于最優(yōu)天線選擇的優(yōu)勢。
[Abstract]:After the business of the fourth generation mobile communication system, the next generation mobile communication system has become a hot topic in the academic field, especially the new requirements of the next generation mobile communication at peak rate, user experience rate, mobility, end to end delay, connection number density, flow density and so on. In this paper, a series of new technologies, such as low complexity beamforming, large antenna technology, full duplex technology, multi-layer heterogeneous network technology, interference management technology and wireless portable transmission technology, are introduced in this paper. This paper studies the topic of "high efficiency transmission scheme research in multi-layered heterogeneous wireless communication network". Following the multi-layer heterogeneous network of Device-to-Device (D2D) communication, considering antenna selection, full duplex, wireless portable transmission and so on, the efficient transmission scheme in multi-layer heterogeneous wireless communication network is studied and performance analysis is carried out. The content of this paper includes the selection of two-way relay antenna under the Nakagami-m channel. And performance analysis, based on full duplex two-way relay antenna selection and performance analysis, research on efficient transmission scheme of relay enhanced wireless portable transmission system, heterogeneous network performance analysis based on interference cancellation technology, relay enhanced heterogeneous network capability analysis based on interference cancellation technology, and D2D system with service quality (Quality-of-Ser Vice, QoS) constrained multi antenna selection and performance analysis. The specific research content and main contributions are as follows: 1. the antenna selection scheme based on the maximum minimum criterion is proposed for the antenna selection problem in the bidirectional multiple antenna amplification and forwarding and decoding relay system, and the performance of the two-way relay system is studied in the case of the proposed scheme. First, the probability density function and the cumulative density function of the signal to noise ratio in the proposed scheme are derived. On this basis, the closed expressions of the system interrupt probability and the average bit error rate are derived. Through the derivation and simulation, it can be seen that the proposed antenna selection scheme can achieve full score set gain. In order to further improve the spectrum efficiency of the system, Rate, we propose a hybrid antenna selection scheme. Numerical simulation results show that the proposed scheme is superior to the original scheme.2. for the two-way large-scale antenna full duplex relay system, and proposes an antenna selection scheme based on the maximum minimum criterion, and analyzes the performance of the proposed scheme when the proposed scheme is adopted. The approximate expression of the probability density function of the terminal user's received signal to noise ratio and the closed expression of the interruption probability of the system are presented. The asymptotic expression for the antenna number approaching infinity is also studied. The simulation results show that the theoretical analysis can effectively reflect the reliability of the system, especially when the signal to noise ratio is larger. With accurate.3. for wireless portable relay transmission system, the time slot allocation scheme and antenna selection scheme in the two-way amplifying and forwarding relay system are proposed respectively, and the effect of the proposed scheme on the system performance is studied. First, the energy acquisition problem of the relay terminal of the two hop transcoding system is proposed, and the connection is derived. The cumulative density function of the signal is received, and the progressive expression of the system interruption probability is obtained. The relationship between the interruption probability, the energy transmission time slot and the power partition factor is given, and the time slot allocation scheme based on the quality of service is proposed. Three relay selection schemes are given by the ratio, the optimal receiving energy and the weighted relay selection criterion. The proposed scheme ensures the transmission quality of the system, while guaranteeing the energy requirement of the wireless charging node.4. against the interference in the heterogeneous network downlink. In order to reduce the interference of the Acer station to the small cell, the base station end is proposed. The interference cancellation algorithm and the overall performance of the heterogeneous network downlink after this scheme are analyzed. First, the probability density function and distribution function of the signal to noise ratio of the Acer station and small cell users are derived. On this basis, the closed table of the overall interruption probability of the system is obtained. The theoretical deduction and simulation results show that the interference is interfering. The elimination scheme can effectively improve the overall performance of heterogeneous cellular networks.5. for multi-layer heterogeneous network downlink. At the same time, considering the direct transmission and relay assisted transmission of Acer station, the interference elimination algorithm is proposed at the Acer station to eliminate the interference of the Acer station for small cell users. The user and small of the Acer station are obtained by theoretical deduction. The cell user receives the probability density function and the cumulative density function of the signal to noise ratio, and gives the closed expression of the system interrupt probability and the average bit error rate. It can be seen through theoretical deduction that the signal to noise ratio gain of the small cell users is eliminated from the cross layer interference from the macro base station side. So the interference elimination can effectively improve the small cell. The performance of the system has been improved and the overall performance of the system has been improved. The results of the numerical simulation verify the conclusion of the theoretical derivation.6., for the D2D communication system, the multi antenna selection problem of the base station is studied, the overall performance of the D2D system is analyzed, and the multi antenna selection algorithm based on the system service quality is proposed. The probability density function and the cumulative density function are derived respectively by the users and the D2D users, and then the overall interruption probability of the D2D system is obtained. Based on the derivation results, a multi antenna selection scheme based on the quality of service constraint is proposed to further improve the energy efficiency of the base station. The number of days required is based on the quality of service constraints and the signal to noise ratio. Finally, the correctness of the derivation is verified by simulation, and the superiority of the proposed scheme relative to the optimal antenna selection is demonstrated.
【學位授予單位】：東南大學
【學位級別】：博士
【學位授予年份】：2016
【分類號】：TN929.5

【相似文獻】

相關期刊論文 前10條

1 陳慶章;組建異構網應著重考慮的問題和產品現狀[J];計算機時代;1994年03期

2 汪蕓,顧冠群,謝俊清,兌繼英,孫昌平;異構網絡集成方法研究[J];計算機研究與發(fā)展;1997年03期

3 馬義忠;楊紅旗;高彥;専秋峰;;基于移動Agent異構網絡管理的分析與設計[J];微計算機信息;2008年33期

4 黃川;鄭寶玉;;多無線電協作技術與異構網絡融合[J];中興通訊技術;2008年03期

5 吳蒙;季麗娜;王X;;無線異構網絡的關鍵安全技術[J];中興通訊技術;2008年03期

6 李R

本文編號：2085594