差分空间调制无线传输技术研究

发布时间：2018-07-12 19:46

本文选题：DSM + 低复杂度　；参考：《电子科技大学》2017年硕士论文

【摘要】：随着绿色通信理念的兴起,空间调制(Spatial Modulation,SM)技术引起了学术界的广泛关注。空间调制系统在每个时隙仅使用单根天线发送信息,从而激活天线的索引也用于携带调制信息。其发射端只需一个射频单元,节省了能耗。而且单天线发送的特性又避免了MIMO系统的信道间干扰(Inter Channel Interference,ICI)、发射天线同步(Inter Antenna Synchronization,IAS)等问题,并为接收端低复杂度的检测提供了可能。然而,空间调制技术也存在一些问题和缺陷。一方面,空间调制系统的接收端需要精确的信道状态消息(Channel State Information,CSI)以进行相干检测,这对信道估计提出了很高的要求;另一方面,在天线数量较多的情况下,多天线信道估计非常复杂。针对上述问题,本文研究了差分空间调制(Differential Spatial Modulation,DSM)系统,它既保留了空间调制系统的优点,又简化了接收端的检测,无需信道估计。本文针对差分空间调制系统,展开如下的研究:第一章介绍了差分空间调制系统以及它在发射端、接收端、性能分析各方面的发展现状。第二章详细介绍了差分空间调制系统的收发端原理和性能分析,并提出了一种基于欧氏距离叠加的低复杂度检测算法,通过仿真验证了提出算法的优势。第三章介绍了幅移相键控差分空间调制(DSM-APSK)系统,提出了一种改进的DSM-APSK系统。通过性能分析进一步优化了提出系统的星座图设计,最后通过仿真验证了提出的新系统的优势。第四章探讨了编码差分空间调制系统。首先介绍了编码差分空间调制系统的收发机原理。然后提出了一种低复杂度的软检测算法。通过外部信息转移特性分析、复杂度分析和MATLAB仿真比较了提出的算法和最优的最大后验概率检测算法,验证了提出的算法的优势。第五章总结了全文内容,探讨了未来的研究方向。
[Abstract]:With the rise of the concept of green communication, spatial modulation (SM) technology has attracted wide attention in academic circles. The spatial modulation system transmits information only using a single antenna in each slot, so that the index of the active antenna is also used to carry the modulation information. The transmitter only needs one RF unit, which saves energy consumption. Moreover, the characteristics of single antenna transmit can avoid the problems of inter channel interference (ICI) and transmit antenna synchronization (IAS), and make it possible to detect the receiver with low complexity. However, there are some problems and defects in spatial modulation technology. On the one hand, the receiver of spatial modulation system needs accurate Channel State Information (CSI) for coherent detection, which makes a high demand for channel estimation; on the other hand, when the number of antennas is large, Multi-antenna channel estimation is very complex. To solve the above problems, the differential Spatial Modulation (DSM) system is studied in this paper. It not only retains the advantages of the spatial modulation system, but also simplifies the detection of the receiver without channel estimation. In this paper, the research of differential space modulation system is presented as follows: in chapter 1, the development of differential space modulation system and its development in transmitter, receiver and performance analysis are introduced. In chapter 2, the principle and performance analysis of the transceiver of differential space modulation system are introduced in detail, and a low complexity detection algorithm based on Euclidean distance superposition is proposed. The advantages of the proposed algorithm are verified by simulation. In chapter 3, the amplitude shift keying differential spatial modulation (DSM-APSK) system is introduced, and an improved DSM-APSK system is proposed. The constellation diagram design of the proposed system is further optimized by performance analysis. Finally, the advantages of the proposed new system are verified by simulation. Chapter 4 discusses the coded differential space modulation system. Firstly, the principle of transceiver in coded differential space modulation system is introduced. Then a low complexity soft detection algorithm is proposed. The advantages of the proposed algorithm are verified by comparing the proposed algorithm with the optimal maximum posterior probability detection algorithm through the analysis of external information transfer characteristics, complexity analysis and MATLAB simulation. The fifth chapter summarizes the content of the paper and discusses the future research direction.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN911.3

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