全双工无线通信系统的干扰消除技术研究
发布时间：2019-06-03 05:03
【摘要】：社会在发展和进步,人类的通信方式在信息经济时代尤为重要。无线通信以其开放式的便捷性引导了人们思维方式和生活方式的改变,无线通信系统的容量将随着需求的增大达到现有通信技术的极限。我们需要研究新型的无线通信技术来大幅提高系统容量,解决频谱资源紧张的问题。而全双工技术在无线通信系统中的应用能够成倍的提升系统容量,成为当今通信研究的热点之一。本文主要以全双工技术基础,研究干扰消除技术,融合MIMO(Multiple Input Multiple Output)技术,设计新型的全双工MIMO系统模型,研究分析全双工系统的容量优势和天线选择对全双工系统的影响。 论文首先概述了无线通信系统的工作方式,通过对时分双工、频分双工等模式的具体阐述,引出了全双工通信的具体工作方式,并对其应用进行了介绍,讨论了全双工无线通信系统的优势和实现的面临难点。 其次论文介绍了全双工无线通信系统的基本原理。考虑到全双工系统会在传输过程中受到强大的自干扰信号影响而难以实现,具体研究了国内外学者提出的全双工天线设计方案和自干扰消除技术。在此基础上,论文探讨了现有成熟的MIMO技术,结合MIMO能够充分利用空间资源的特点,设计新型的全双工MIMO系统模型,在理论上充分验证系统的可行性。 接着论文对全双工系统的容量进行了理论研究分析。全双工无线通信技术能够使得通信双方在同时、同频的情况下进行信息的传递,从而节省一半频率或时间资源,在MIMO系统容量研究的基础上,附导全双工MIMO系统的容量的计算方法,并在信道状态信息情况可获得的情况下,通过仿真对比了全双工MIMO系统和传统的半双工MIMO系统的容量,验证了全双工技术能提升无线网络容量的优势。 最后论文研究了天线选择对全双工MIMO系统的影响。天线选择能在多天线系统中选择可靠天线收发信息,能有效降低系统算法复杂度,节约系统资源。论文结合提出的全双工MIMO系统模型,引入了系统干扰消除因子,对天线选择进行深入分析,提出最大后处理SINR准则、最小奇异值最大化准则和容量最大准则。随后又在低秩信道下研究天线选择对全双工系统的影响,仿真验证了进行天线选择的优势。
[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.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3
本文编号：2491694
[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.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3
【参考文献】
相关期刊论文 前1条
1 苏彦兵,谈振辉;基于天线选择的低秩信道MIMO系统容量研究[J];电子学报;2004年03期
，本文编号：2491694
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