k用户MIMO-Y双向中继信道信号传输算法研究
发布时间：2018-11-04 21:49
【摘要】：近年来,物理层网络编码技术(physical-layer network coding, PNC)和多输入多输出(MIMO)技术由于其良好的性能受到了学者的广泛关注。物理层网络编码技术是将有线网络中的网络编码思想应用到无线网络中,这种思想是使传统无线网络中只负责转发数据的中继节点具备对接收到的数据包进行组合、编码等智能化处理,在一定程度上解决了无线网络中节点间的相互干扰问题,能大大提高网络的吞吐量和节约无线频率资源,同时增强了信息的安全性。多输入多输出(MIMO)技术结合了传统的空间分集技术和空间复用技术的优点,利用多根发射天线和多根接收天线所提供的空间自由度,可以在不需要增加带宽或总功率损耗的情况下有效提高无线通信系统的频谱效率,提升数据传输速率。k用户MIMO-Y信道由k个用户和一个中继组成,每个用户装备Nt根天线,中继装备Nr根天线,用户两两之间通过中继节点实现信息的交换,每个用户在向其他所有用户发送信息的同时,也接收其他所有用户的信息,整个过程耗费两个时隙,分别称为多址接入(multi access channels,MAC)阶段和(broadcast channels,BC)阶段。本文研究了采用物理层网络编码技术在k用户MIMO-Y信道中实现用户间信息交换的信号传输算法,针对已有的SSA-INB方案的矛盾问题,主要研究并提出了在MAC阶段和BC阶段均采用信号空间对齐(signal space alignment, SSA)算法的SSA-SSA方案以及在MAC阶段和BC阶段均采用广义信号对齐(general signal alignment, GSA)算法的GSA-GSA方案。前者实现的基本条件为Nr2Nt,而后者实现的基本条件为Nr(k-2)Nt,二者在一定程度上可以看做相互补充。本文对SSA-SSA方案和GSA-GSA方案的实现算法进行了详细介绍,并对其系统和速率和复杂度进行了理论分析,最后对信噪比在0到50dB的变化范围内的GSA-GSA方案和SSA-SSA方案的系统和速率进行了仿真分析,并与已有的SSA-INB方案进行了对比。仿真分析表明在相同信噪比以及相同系统自由度的条件下,GSA-GSA方案和SSA-SSA方案的性能优于SSA-INB方案,GSA-GSA方案性能优于SSA-SSA方案。
[Abstract]:In recent years, physical layer network coding (physical-layer network coding, PNC) and multiple input / multiple output (MIMO) techniques have attracted wide attention due to their good performance. The physical layer network coding technology is to apply the network coding idea in wired network to wireless network. This idea is to make the relay node which is only responsible for forwarding data have the ability to combine the received data packet in the traditional wireless network. Intelligent processing, such as coding, solves the problem of interference between nodes in wireless network to a certain extent, can greatly improve the throughput of the network and save the wireless frequency resources, at the same time, enhance the security of information. Multi-input multiple-output (MIMO) technology combines the advantages of traditional spatial diversity and spatial multiplexing, and makes use of the spatial degrees of freedom provided by multiple transmit antennas and multiple receiving antennas. Without increasing bandwidth or total power loss, the spectrum efficiency and data transmission rate of wireless communication system can be improved effectively. K user MIMO-Y channel is composed of k users and a relay. Each user is equipped with a Nt root antenna. The relay is equipped with Nr root antenna, and the information is exchanged between two users through the relay node. Each user not only sends the information to all other users, but also receives the information of all other users. The whole process consumes two time slots. It is called multiple access (multi access channels,MAC) stage and (broadcast channels,BC) stage respectively. In this paper, we study the signal transmission algorithm to realize the information exchange between users in k user MIMO-Y channel by using physical layer network coding technology, aiming at the contradiction of existing SSA-INB scheme. This paper mainly studies and proposes a SSA-SSA scheme in which the signal space alignment (signal space alignment, SSA) algorithm is used in both MAC and BC stages and a GSA-GSA scheme in which the generalized signal alignment (general signal alignment, GSA) algorithm is used in both MAC and BC phases. The basic condition of the former is Nr2Nt, and the latter is that Nr (k-2) Nt, can be regarded as complementary to each other to some extent. In this paper, the implementation algorithms of SSA-SSA scheme and GSA-GSA scheme are introduced in detail, and its system, rate and complexity are analyzed theoretically. Finally, the system and rate of GSA-GSA scheme and SSA-SSA scheme in the range of 0 to 50dB are simulated and analyzed, and compared with the existing SSA-INB scheme. Simulation results show that the performance of GSA-GSA scheme and SSA-SSA scheme is better than that of SSA-INB scheme, and that of GSA-GSA scheme is better than that of SSA-SSA scheme under the same SNR and the same system degree of freedom.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3
本文编号：2311240
[Abstract]:In recent years, physical layer network coding (physical-layer network coding, PNC) and multiple input / multiple output (MIMO) techniques have attracted wide attention due to their good performance. The physical layer network coding technology is to apply the network coding idea in wired network to wireless network. This idea is to make the relay node which is only responsible for forwarding data have the ability to combine the received data packet in the traditional wireless network. Intelligent processing, such as coding, solves the problem of interference between nodes in wireless network to a certain extent, can greatly improve the throughput of the network and save the wireless frequency resources, at the same time, enhance the security of information. Multi-input multiple-output (MIMO) technology combines the advantages of traditional spatial diversity and spatial multiplexing, and makes use of the spatial degrees of freedom provided by multiple transmit antennas and multiple receiving antennas. Without increasing bandwidth or total power loss, the spectrum efficiency and data transmission rate of wireless communication system can be improved effectively. K user MIMO-Y channel is composed of k users and a relay. Each user is equipped with a Nt root antenna. The relay is equipped with Nr root antenna, and the information is exchanged between two users through the relay node. Each user not only sends the information to all other users, but also receives the information of all other users. The whole process consumes two time slots. It is called multiple access (multi access channels,MAC) stage and (broadcast channels,BC) stage respectively. In this paper, we study the signal transmission algorithm to realize the information exchange between users in k user MIMO-Y channel by using physical layer network coding technology, aiming at the contradiction of existing SSA-INB scheme. This paper mainly studies and proposes a SSA-SSA scheme in which the signal space alignment (signal space alignment, SSA) algorithm is used in both MAC and BC stages and a GSA-GSA scheme in which the generalized signal alignment (general signal alignment, GSA) algorithm is used in both MAC and BC phases. The basic condition of the former is Nr2Nt, and the latter is that Nr (k-2) Nt, can be regarded as complementary to each other to some extent. In this paper, the implementation algorithms of SSA-SSA scheme and GSA-GSA scheme are introduced in detail, and its system, rate and complexity are analyzed theoretically. Finally, the system and rate of GSA-GSA scheme and SSA-SSA scheme in the range of 0 to 50dB are simulated and analyzed, and compared with the existing SSA-INB scheme. Simulation results show that the performance of GSA-GSA scheme and SSA-SSA scheme is better than that of SSA-INB scheme, and that of GSA-GSA scheme is better than that of SSA-SSA scheme under the same SNR and the same system degree of freedom.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3
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1 王涛;k用户MIMO-Y双向中继信道信号传输算法研究[D];西安电子科技大学;2014年
，本文编号：2311240
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