多天线中继系统中的可靠传输技术研究
发布时间：2019-06-09 19:45
【摘要】：中继技术的兴起与发展极大改善了通信网络的覆盖能力。而多输入多输出(Multiple Input Multiple Output, MIMO)技术与中继技术的结合则有望推动中继实现更高频谱利用率、更高传输可靠性。本文主要研究多天线中继系统中的可靠传输技术,旨在优化中继系统中信息传输的误码性能以及安全性能。研究内容主要涵盖两个方面：1)以对抗系统噪声信道衰落等客观干扰为主要目的的分集技术；2)以对抗主观攻击为主要目的的安全通信技术。在分集技术方面,本文重点研究了具备全分集性能的低复杂度接收机设计、以及传输方案设计。在安全通信方面,本文重点研究了依靠物理层信号的攻击检测技术。本文的创新点归纳如下： 第一,本文提出了一种针对MPSK调制的物理层网络编码(Physical-layer Coding, PNC)专属检测技术。该技术能够从物理层的接收信号中直接提取多进制移相键控(M-ary phase-shift keying, MPSK) MPSK调制下的网络编码符号而不需要经过分别检测再编码的过程,因此降低了运算复杂度。该技术的主要技术手段是计算接收信号的内积或者外积,从而使网络编码符号内含在内积或外积中。本文继而提出了一种基于内积或外积的最大似然检测算法来提取出网络编码符号。最后,仿真表明基于外积的最大似然检测器取得了全分集性能。 第二,本文提出了基于符号的物理层网络编码(Symbol-based Physical-layer Coding, SPNC)传输技术。SPNC技术主要面向MPSK调制,在信息检测的最终环节采取PNC专属检测技术,因此具备PNC专属检测器的低复杂度优势。SPNC技术同时能在更宽泛的应用条件下获得全分集增益。具体而言,本文提出了基于天线选择的SPNC方案(Antenna selection based SPNC, AS-SPNC)和基于信号合并的SPNC方案(Signal-combination based SPNC, SC-SPNC)。理论分析不仅证明两种方案都可以获得全分集增益,同时表明在使用SPNC技术时,多天线中继系统可以等效为一个点对点的单入多出系统(Single Input Multiple Output, SIMO),并且,AS-SPNC方案和SC-SPNC方案可以分别视作这一等效系统中的AS和最大比合并方案(Maximal Ratio Combining, MRC)。本文给出了所提方案的误码率表达式,并且理论分析和仿真结果一致。最后,本文将所提SPNC技术扩展到MQAM调制的系统中,进一步深入了SPNC技术的研究和应用。 第三,本文针对多中继网络提出了一种相位旋转(Phase Rota-tion, PR)辅助的中继选择技术,该技术旨在优化端到端的符号错误率。所提PR技术能够使MaxMin选择准则在采用解码转发(Decode-and-Forward, DF)模式的双向中继网络中获取全分集增益。本文所提PR技术可以控制最小判决距离使其无法趋向任意小的数值,从而改善误码性能,进而允许MaxMin中继选择技术获得全分集增益。同时,本文给出性能分析,分析结果不仅验证了所提方案的全分集性能,而且说明了所提方案还可以改善系统的阵列增益。值得注意的是相比现有文献中基于DF的设计方案,本文所提方案允许更灵活的中继天线配置。另外,为了避免实际应用中的反馈开销,本文还提出了一种基于PR的符号拓展方案,在该方案中源节点无需反馈信道信息同样可以采用PR技术辅助MaxMin准则获取全分集增益。 第四,本文研究了可靠边信息缺失下的物理层攻击检测技术。该技术旨在使信宿节点在没有可靠边信息辅助时也能够检测中继节点是否如实履行转发职责。围绕这一目标,本文将中继系统划分为攻击可检测系统以及攻击不可检测系统。并通过理论分析证明了在攻击可检测系统中,一定存在渐进无差错检测子使信宿节点仅依靠物理层接收信号就能够掌握中继的行为信息,而这样的无差错检测子在攻击不可检测系统中一定不存在。本文继而提出了判定中继系统是否属于攻击可检测系统的实际验证算法,并通过所提验证算法进一步指出许多典型的中继系统都属于攻击可检测系统。同时,本文还提出了可靠边信息缺失下的恶意中继定位算法,理论分析表明该算法同样具有渐进无差错性能。值得注意的是本文所提的无差错检测算法都无需依靠密钥、先验参考序列等可靠边信息的辅助,因此相比现有的、基于密钥或者网络协议的检测算法,本文所提算法具有更高的传输效率。
[Abstract]:The rise and development of the relay technology greatly improves the coverage ability of the communication network. The combination of multiple input multiple output (MIMO) and relay technology is expected to push the relay to achieve higher frequency spectrum utilization and higher transmission reliability. This paper mainly studies the reliable transmission technology in multi-antenna relay system, which is to optimize the error performance and safety performance of the information transmission in the relay system. The content of the research mainly covers two aspects:1) the diversity technology which is the main purpose of the objective interference such as the fading of the system noise channel and the like;2) the security communication technology aiming at the main purpose of resisting the subjective attack. In terms of diversity technology, this paper focuses on the design of low-complexity receiver with full-diversity performance and the transmission scheme design. In the aspect of secure communication, this paper focuses on the attack detection technology that relies on the physical layer signal. The innovation points of this paper are summarized as follows: First, a physical-layer coding (PNC)-specific detection technique for MPSK modulation is presented in this paper. The technique can directly extract the network coded symbols under the M-ary phase-shift keying (MPSK) MPSK modulation from the received signal of the physical layer without the need of the process of separately detecting and re-encoding, thus reducing the complexity of the operation. the main technical means of the technique is to calculate the inner product or the outer product of the received signal, so that the network coding symbol is contained in the inner product or the outer product In this paper, a maximum likelihood detection algorithm based on internal product or external product is presented to extract the network code. Finally, the simulation shows that the maximum likelihood detector based on the outer product has obtained the complete diversity. In this paper, the symbol-based physical-layer coding (SPNC) transmission is proposed in this paper. The SPNC technology is mainly for MPSK modulation, and the PNC-specific detection technology is adopted in the final part of the information detection, so it has the low complexity of the PNC-specific detector. Degree advantage. The SPNC technology can be used at the same time to obtain a full score under the broader application conditions In this paper, an antenna-based SPNC program (AS-SPNC) and a signal-based SPNC (Signal-combining based SPNC, SC-SP) scheme are proposed in this paper. The theoretical analysis not only proves that both schemes can obtain the full diversity gain, but also shows that the multi-antenna relay system can be equivalent to a point-to-point single-input multiple-output system (SIMO) when the SPNC technology is used. and the AS-SPNC scheme and the SC-SPNC scheme may be considered as the AS and the maximum ratio merging scheme in this equivalent system, respectively (Maxime Ratio combining, M The error rate expression of the proposed scheme is given in this paper, and the theoretical analysis and the simulation are presented. In the end, the SPNC technology is extended to the system of MQAM modulation, and the research of the SPNC technology is further studied. Third, this paper presents a phase rotation (PR)-assisted relay selection technique for multi-relay networks, which is designed to optimize the end-to-end The proposed PR technique enables the MaxMin selection criterion to be obtained in a two-way relay network using the Decode-and-Forward (DF) mode The PR technique proposed in this paper can control the minimum decision distance so that it can't tend to any small value, so as to improve the error code performance and to allow the MaxMin relay selection technique to be obtained. At the same time, the performance analysis is given in this paper. The analysis result not only verifies the full diversity performance of the proposed scheme, but also shows that the proposed scheme can also improve the system. It is worth noting that the scheme proposed in this paper is allowed to be more flexible as compared to the DF-based design in the existing literature. In addition, in order to avoid the feedback overhead in the practical application, a symbol expansion scheme based on PR is also proposed in this paper. In this scheme, the source node does not need the feedback channel information, and can also be obtained by using the PR technique to support the MaxMin criterion. Fourth, this paper studies the physics of the loss of reliable edge information the technique is to enable the sink node to detect if the relay node, for example, In this paper, the relay system is divided into the attack detection system and the attack. By means of the theory analysis, it is proved that there is a gradual error-free detection in the attack detection system, so that the sink node can master the behavior information of the relay only by means of the physical layer receiving signal, and the error-free detection sub-system can not be detected by the attack. In this paper, an actual verification algorithm for determining whether the relay system belongs to an attack detection system is presented, and many typical relay systems are further pointed out by the proposed verification algorithm. In addition, a malicious relay location algorithm under the absence of reliable edge information is presented in this paper, and the theoretical analysis shows that the algorithm has the same function. It is worth noting that the error-free detection algorithm proposed in this paper does not need to rely on the aid of reliable edge information such as the key, the prior reference sequence and so on. Therefore, compared with the existing detection algorithm based on the key or the network protocol, the proposed algorithm has the advantages of
【学位授予单位】：北京邮电大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN92
本文编号：2495845
[Abstract]:The rise and development of the relay technology greatly improves the coverage ability of the communication network. The combination of multiple input multiple output (MIMO) and relay technology is expected to push the relay to achieve higher frequency spectrum utilization and higher transmission reliability. This paper mainly studies the reliable transmission technology in multi-antenna relay system, which is to optimize the error performance and safety performance of the information transmission in the relay system. The content of the research mainly covers two aspects:1) the diversity technology which is the main purpose of the objective interference such as the fading of the system noise channel and the like;2) the security communication technology aiming at the main purpose of resisting the subjective attack. In terms of diversity technology, this paper focuses on the design of low-complexity receiver with full-diversity performance and the transmission scheme design. In the aspect of secure communication, this paper focuses on the attack detection technology that relies on the physical layer signal. The innovation points of this paper are summarized as follows: First, a physical-layer coding (PNC)-specific detection technique for MPSK modulation is presented in this paper. The technique can directly extract the network coded symbols under the M-ary phase-shift keying (MPSK) MPSK modulation from the received signal of the physical layer without the need of the process of separately detecting and re-encoding, thus reducing the complexity of the operation. the main technical means of the technique is to calculate the inner product or the outer product of the received signal, so that the network coding symbol is contained in the inner product or the outer product In this paper, a maximum likelihood detection algorithm based on internal product or external product is presented to extract the network code. Finally, the simulation shows that the maximum likelihood detector based on the outer product has obtained the complete diversity. In this paper, the symbol-based physical-layer coding (SPNC) transmission is proposed in this paper. The SPNC technology is mainly for MPSK modulation, and the PNC-specific detection technology is adopted in the final part of the information detection, so it has the low complexity of the PNC-specific detector. Degree advantage. The SPNC technology can be used at the same time to obtain a full score under the broader application conditions In this paper, an antenna-based SPNC program (AS-SPNC) and a signal-based SPNC (Signal-combining based SPNC, SC-SP) scheme are proposed in this paper. The theoretical analysis not only proves that both schemes can obtain the full diversity gain, but also shows that the multi-antenna relay system can be equivalent to a point-to-point single-input multiple-output system (SIMO) when the SPNC technology is used. and the AS-SPNC scheme and the SC-SPNC scheme may be considered as the AS and the maximum ratio merging scheme in this equivalent system, respectively (Maxime Ratio combining, M The error rate expression of the proposed scheme is given in this paper, and the theoretical analysis and the simulation are presented. In the end, the SPNC technology is extended to the system of MQAM modulation, and the research of the SPNC technology is further studied. Third, this paper presents a phase rotation (PR)-assisted relay selection technique for multi-relay networks, which is designed to optimize the end-to-end The proposed PR technique enables the MaxMin selection criterion to be obtained in a two-way relay network using the Decode-and-Forward (DF) mode The PR technique proposed in this paper can control the minimum decision distance so that it can't tend to any small value, so as to improve the error code performance and to allow the MaxMin relay selection technique to be obtained. At the same time, the performance analysis is given in this paper. The analysis result not only verifies the full diversity performance of the proposed scheme, but also shows that the proposed scheme can also improve the system. It is worth noting that the scheme proposed in this paper is allowed to be more flexible as compared to the DF-based design in the existing literature. In addition, in order to avoid the feedback overhead in the practical application, a symbol expansion scheme based on PR is also proposed in this paper. In this scheme, the source node does not need the feedback channel information, and can also be obtained by using the PR technique to support the MaxMin criterion. Fourth, this paper studies the physics of the loss of reliable edge information the technique is to enable the sink node to detect if the relay node, for example, In this paper, the relay system is divided into the attack detection system and the attack. By means of the theory analysis, it is proved that there is a gradual error-free detection in the attack detection system, so that the sink node can master the behavior information of the relay only by means of the physical layer receiving signal, and the error-free detection sub-system can not be detected by the attack. In this paper, an actual verification algorithm for determining whether the relay system belongs to an attack detection system is presented, and many typical relay systems are further pointed out by the proposed verification algorithm. In addition, a malicious relay location algorithm under the absence of reliable edge information is presented in this paper, and the theoretical analysis shows that the algorithm has the same function. It is worth noting that the error-free detection algorithm proposed in this paper does not need to rely on the aid of reliable edge information such as the key, the prior reference sequence and so on. Therefore, compared with the existing detection algorithm based on the key or the network protocol, the proposed algorithm has the advantages of
【学位授予单位】：北京邮电大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN92
【参考文献】
相关期刊论文 前1条
1 赵国群,马新武,王广春,赵新海;锻造过程最优化预成形设计系统的开发研究[J];锻压机械;1999年04期
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