物理层网络编码中连续相位调制信号检测性能的研究
发布时间：2018-12-27 18:29
【摘要】：近几年,无线通信由于其适应性强,组网快,覆盖范围广等诸多优点使得其发展迅猛。伴随着物理层网络编码(Physical-Layer Network Coding)这一新概念的提出,无线通信在吞吐量上实现了巨大突破。但BPSK,QPSK,QAM等线性调制方式仍是物理层网络编码研究的主流。而无线通信信道衰减大,伴随着现阶段对速率越来越快的需求,线性调制方式已经满足不了无线通信对功率利用率和频谱利用率的要求。连续相位调制(Continuous Phase Modulation)方式作为一种功率利用率和频谱利用率高的调制方式,成为物理层网络编码理论中研究的一个热点。论文首先研究了物理层网络编码中CPM信号(CPM-PNC)的相干检测,并对两种特殊的CPM信号给出仿真结果和分析。但相干检测过程中涉及到复杂的相位同步,而且同步误差会大大影响检测的性能和稳定性。针对上述这一问题,在论文中设计了一种CPM-PNC非相干多符号检测算法,一方面可以有效消除相位偏移对检测性能的影响,另一方面,充分利用连续相位调制相位记忆的特点,使得检测性能接近CPM-PNC相干检测性能。但非相干多符号检测算法每次观察多个码元只能检测出一个码元,检测较慢,针对这一问题,又提出了CPM-PNC非相干块检测算法,能够每次观察多个码元同时检测出多个码元,检测速率提高了。同时,针对块检测复杂度和检测性能的问题,又提出了低复杂度CPM-PNC非相干块检测和改进的CPM-PNC非相干块检测。本文提出的低复杂度CPM-PNC非相干块检测结构有效降低了接收端的复杂度,而改进的CPM-PNC非相干块检测不仅可以有效降低接收端的复杂度还能有效提高非相干块检测的检测性能。
[Abstract]:In recent years, wireless communication has developed rapidly because of its strong adaptability, fast networking and wide coverage. With the development of the new concept of physical layer network coding (Physical-Layer Network Coding), wireless communication has achieved a great breakthrough in throughput. However, linear modulation, such as BPSK,QPSK,QAM, is still the mainstream of physical layer network coding. However, the wireless communication channel has a large attenuation. With the increasing demand for the rate at the present stage, the linear modulation can not meet the requirements of wireless communication for power efficiency and spectrum efficiency. As a kind of modulation mode with high power efficiency and spectrum efficiency, continuous phase modulation (Continuous Phase Modulation) has become a hot topic in the field of physical layer network coding theory. Firstly, the coherent detection of CPM signal (CPM-PNC) in physical layer network coding is studied, and the simulation results and analysis of two special CPM signals are given. However, the coherent detection involves complex phase synchronization, and the synchronization error will greatly affect the performance and stability of the detection. In order to solve the above problem, a CPM-PNC incoherent multi-symbol detection algorithm is designed in this paper. On the one hand, the influence of phase offset on detection performance can be effectively eliminated, and on the other hand, the characteristics of continuous phase modulation phase memory can be fully utilized. The detection performance is close to that of CPM-PNC coherent detection. But the incoherent multi-symbol detection algorithm can detect only one symbol at a time, so the detection is slow. In order to solve this problem, a CPM-PNC incoherent block detection algorithm is proposed, which can detect multiple symbols at the same time. The detection rate has been improved. At the same time, low complexity CPM-PNC incoherent block detection and improved CPM-PNC incoherent block detection are proposed to solve the problem of block detection complexity and detection performance. The low complexity CPM-PNC incoherent block detection structure proposed in this paper effectively reduces the complexity of the receiver. The improved CPM-PNC incoherent block detection can not only effectively reduce the complexity of the receiver, but also improve the detection performance of the incoherent block detection.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN911.23
本文编号：2393440
[Abstract]:In recent years, wireless communication has developed rapidly because of its strong adaptability, fast networking and wide coverage. With the development of the new concept of physical layer network coding (Physical-Layer Network Coding), wireless communication has achieved a great breakthrough in throughput. However, linear modulation, such as BPSK,QPSK,QAM, is still the mainstream of physical layer network coding. However, the wireless communication channel has a large attenuation. With the increasing demand for the rate at the present stage, the linear modulation can not meet the requirements of wireless communication for power efficiency and spectrum efficiency. As a kind of modulation mode with high power efficiency and spectrum efficiency, continuous phase modulation (Continuous Phase Modulation) has become a hot topic in the field of physical layer network coding theory. Firstly, the coherent detection of CPM signal (CPM-PNC) in physical layer network coding is studied, and the simulation results and analysis of two special CPM signals are given. However, the coherent detection involves complex phase synchronization, and the synchronization error will greatly affect the performance and stability of the detection. In order to solve the above problem, a CPM-PNC incoherent multi-symbol detection algorithm is designed in this paper. On the one hand, the influence of phase offset on detection performance can be effectively eliminated, and on the other hand, the characteristics of continuous phase modulation phase memory can be fully utilized. The detection performance is close to that of CPM-PNC coherent detection. But the incoherent multi-symbol detection algorithm can detect only one symbol at a time, so the detection is slow. In order to solve this problem, a CPM-PNC incoherent block detection algorithm is proposed, which can detect multiple symbols at the same time. The detection rate has been improved. At the same time, low complexity CPM-PNC incoherent block detection and improved CPM-PNC incoherent block detection are proposed to solve the problem of block detection complexity and detection performance. The low complexity CPM-PNC incoherent block detection structure proposed in this paper effectively reduces the complexity of the receiver. The improved CPM-PNC incoherent block detection can not only effectively reduce the complexity of the receiver, but also improve the detection performance of the incoherent block detection.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN911.23
【参考文献】
相关期刊论文 前3条
1 沙楠;高媛媛;益晓新;龙彦汕;;基于连续相位频移键控调制的物理层网络编码检测及性能分析[J];电子与信息学报;2014年06期
2 陈志成;郑宝玉;吉晓东;肖小潮;;一种基于TCM的信道编码与物理层网络编码的联合设计[J];电子与信息学报;2011年11期
3 陈晨;程海川;依那;项海格;;物理层网络编码在数据会聚无线自组织网络中的容量增益研究[J];电子与信息学报;2010年08期
，本文编号：2393440
本文链接：https://www.wllwen.com/kejilunwen/xinxigongchenglunwen/2393440.html
