【摘要】：社會在發(fā)展和進步,人類的通信方式在信息經濟時代尤為重要。無線通信以其開放式的便捷性引導了人們思維方式和生活方式的改變,無線通信系統的容量將隨著需求的增大達到現有通信技術的極限。我們需要研究新型的無線通信技術來大幅提高系統容量,解決頻譜資源緊張的問題。而全雙工技術在無線通信系統中的應用能夠成倍的提升系統容量,成為當今通信研究的熱點之一。本文主要以全雙工技術基礎,研究干擾消除技術,融合MIMO(Multiple Input Multiple Output)技術,設計新型的全雙工MIMO系統模型,研究分析全雙工系統的容量優(yōu)勢和天線選擇對全雙工系統的影響。 論文首先概述了無線通信系統的工作方式,通過對時分雙工、頻分雙工等模式的具體闡述,引出了全雙工通信的具體工作方式,并對其應用進行了介紹,討論了全雙工無線通信系統的優(yōu)勢和實現的面臨難點。 其次論文介紹了全雙工無線通信系統的基本原理�？紤]到全雙工系統會在傳輸過程中受到強大的自干擾信號影響而難以實現,具體研究了國內外學者提出的全雙工天線設計方案和自干擾消除技術。在此基礎上,論文探討了現有成熟的MIMO技術,結合MIMO能夠充分利用空間資源的特點,設計新型的全雙工MIMO系統模型,在理論上充分驗證系統的可行性。 接著論文對全雙工系統的容量進行了理論研究分析。全雙工無線通信技術能夠使得通信雙方在同時、同頻的情況下進行信息的傳遞,從而節(jié)省一半頻率或時間資源,在MIMO系統容量研究的基礎上,附導全雙工MIMO系統的容量的計算方法,并在信道狀態(tài)信息情況可獲得的情況下,通過仿真對比了全雙工MIMO系統和傳統的半雙工MIMO系統的容量,驗證了全雙工技術能提升無線網絡容量的優(yōu)勢。 最后論文研究了天線選擇對全雙工MIMO系統的影響。天線選擇能在多天線系統中選擇可靠天線收發(fā)信息,能有效降低系統算法復雜度,節(jié)約系統資源。論文結合提出的全雙工MIMO系統模型,引入了系統干擾消除因子,對天線選擇進行深入分析,提出最大后處理SINR準則、最小奇異值最大化準則和容量最大準則。隨后又在低秩信道下研究天線選擇對全雙工系統的影響,仿真驗證了進行天線選擇的優(yōu)勢。
[Abstract]:Society is developing and making progress, and human communication is particularly important in the era of information economy. Wireless communication leads to the change of people's thinking mode and life style because of its open convenience. The capacity of wireless communication system will reach the limit of existing communication technology with the increase of demand. We need to study new wireless communication technology to greatly improve the system capacity and solve the problem of shortage of spectrum resources. The application of full duplex technology in wireless communication system can double the system capacity, which has become one of the hotspots of communication research. In this paper, based on full duplex technology, interference cancellation technology is studied, MIMO (Multiple Input Multiple Output) technology is integrated, a new full duplex MIMO system model is designed, and the capacity advantages of full duplex system and the influence of antenna selection on full duplex system are studied and analyzed. Firstly, this paper summarizes the working mode of wireless communication system, through the concrete description of time division duplex, frequency division duplex and other modes, leads to the concrete working mode of full duplex communication, and introduces its application. The advantages and difficulties of full duplex wireless communication system are discussed. Secondly, the basic principle of full duplex wireless communication system is introduced. Considering that the full-duplex system is difficult to be realized because of the strong self-interference signal in the transmission process, the full-duplex antenna design scheme and self-interference cancellation technology proposed by scholars at home and abroad are studied in detail. On this basis, this paper discusses the existing mature MIMO technology, combined with the characteristics that MIMO can make full use of space resources, designs a new full-duplex MIMO system model, and fully verifies the feasibility of the system in theory. Then the capacity of full duplex system is studied and analyzed theoretically. Full duplex wireless communication technology can enable both sides of the communication to transmit information at the same time and at the same time, thus saving half of the frequency or time resources. On the basis of the research of MIMO system capacity, With the calculation method of the capacity of the full duplex MIMO system, and when the channel state information is available, the capacity of the full duplex MIMO system and the traditional half duplex MIMO system is compared by simulation. The advantages of full duplex technology to improve the capacity of wireless network are verified. Finally, the influence of antenna selection on full-duplex MIMO system is studied. Antenna selection can select reliable antenna to receive and receive information in multi-antenna system, which can effectively reduce the complexity of the system algorithm and save system resources. Combined with the proposed full-duplex MIMO system model, the interference cancellation factor of the system is introduced, the antenna selection is analyzed deeply, and the maximum post-processing SINR criterion, the minimum singular value maximization criterion and the maximum capacity criterion are proposed. Then the influence of antenna selection on full-duplex system is studied in low rank channel, and the advantages of antenna selection are verified by simulation.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN919.3

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本文編號：2491694