MIMO无线通信系统空间调制技术的研究
发布时间：2018-09-03 06:57
【摘要】：随着移动通信技术的高速发展,人们对通信系统的传输速率和通信可靠性有了更高的要求,有限的通信资源与日益增长的通信业务需求之间的矛盾已成为下一代移动通信亟待解决的关键问题。多输入多输出(MIMO)技术通过架设多根收发天线在保证系统可靠传输的前提下大幅度的提高数据传输速率,而系统的性能却受信道干扰(ICI)、发端天线同步(ISA)以及复杂度较高的接收机检测算法的限制。空间调制(SM)作为一种新的MIMO调制技术,是将输入信息比特分成两部分分别映射到空间天线星座图和信号星座图上,在不增加系统带宽和发射功率的前提下有效提高系统的频带利用率,克服了传统MIMO调制技术的缺陷。 本文依据空间调制的概念对MIMO环境下空间调制系统的性能进行深入研究。基于空间调制技术的研究背景以及国内外发展现状,论文首先介绍了空间调制的原理和系统模型,在瑞利衰落信道下针对不同的解调算法进行仿真分析,同时研究了空移键控(SSK)和广义空移键控(GSSK)调制技术,并与空间调制的性能进行比较。其次,对空间调制系统的误码性能进行了理论分析,讨论了空移键控和空间调制的几种理论分析方法,通过逐步优化空间调制的误码性能解析分析模型最终得到空间调制在任意MIMO场景下其性能的理论界限,并仿真验证了这种方法的准确性。 为了进一步研究空间调制的性能特点,本文对非高斯噪声衰落信道下的空间调制系统的误码性能进行了研究。引入混合高斯信道模型并通过改变噪声模型参数分析了在突发脉冲干扰环境下SM系统的误码性能,仿真结果表明空间调制具有较强的抗脉冲干扰能力。 此外,论文还对可见光通信(VLC)空间调制系统性能进行了分析。基于室内可见光的视距(LOS)传输信道模型,研究了在室内MIMO环境下可见光通信系统(VLC)的光信道特性,并在可见光视距传输环境下通过改变LED发射机和接收机的位置因素仿真实现空间调制系统,进一步分析了空间调制技术在VLC系统的性能优势。
[Abstract]:With the rapid development of mobile communication technology, people have higher requirements for the transmission rate and communication reliability of the communication system. The contradiction between the limited communication resources and the increasing demand for communication services has become a key problem to be solved in the next generation of mobile communications. Multi-input multiple-output (MIMO) technology can greatly improve the data transmission rate by erecting multiple transceiver antennas to ensure the reliable transmission of the system. However, the performance of the system is limited by the channel interference (ICI), antenna synchronization (ISA) and the receiver detection algorithm with high complexity. As a new MIMO modulation technique, spatially modulated (SM) is divided into two parts, which are mapped to the space antenna constellation and the signal constellation, respectively. Without increasing the bandwidth and transmitting power of the system, the bandwidth efficiency of the system is improved effectively, and the defects of the traditional MIMO modulation technology are overcome. Based on the concept of spatial modulation, the performance of spatial modulation system in MIMO environment is studied in this paper. Based on the research background of spatial modulation technology and the development situation at home and abroad, this paper firstly introduces the principle and system model of spatial modulation, and simulates and analyzes different demodulation algorithms in Rayleigh fading channel. At the same time, the techniques of (SSK) and (GSSK) modulation are studied, and compared with the performance of spatial modulation. Secondly, the error performance of spatial modulation system is theoretically analyzed, and several theoretical analysis methods of space shift keying and spatial modulation are discussed. The theoretical bounds of the performance of spatial modulation in arbitrary MIMO scenes are finally obtained by using an analytical model of error performance analysis for progressive optimization of spatial modulation. The accuracy of this method is verified by simulation. In order to further study the performance characteristics of spatial modulation, the error performance of spatial modulation system in non-Gao Si noise fading channel is studied in this paper. The mixed Gao Si channel model is introduced and the error performance of SM system is analyzed by changing the parameters of the noise model. The simulation results show that spatial modulation has a strong anti-impulse interference capability. In addition, the performance of (VLC) spatial modulation system for visible light communication is analyzed. Based on the Indoor visible Light (LOS) transmission channel model, the optical channel characteristics of visible light communication system (VLC) in indoor MIMO environment are studied. The spatial modulation system is realized by changing the position factors of the LED transmitter and receiver under the visible line-of-sight transmission environment. The performance advantages of the spatial modulation technology in the VLC system are further analyzed.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3
本文编号：2219246
[Abstract]:With the rapid development of mobile communication technology, people have higher requirements for the transmission rate and communication reliability of the communication system. The contradiction between the limited communication resources and the increasing demand for communication services has become a key problem to be solved in the next generation of mobile communications. Multi-input multiple-output (MIMO) technology can greatly improve the data transmission rate by erecting multiple transceiver antennas to ensure the reliable transmission of the system. However, the performance of the system is limited by the channel interference (ICI), antenna synchronization (ISA) and the receiver detection algorithm with high complexity. As a new MIMO modulation technique, spatially modulated (SM) is divided into two parts, which are mapped to the space antenna constellation and the signal constellation, respectively. Without increasing the bandwidth and transmitting power of the system, the bandwidth efficiency of the system is improved effectively, and the defects of the traditional MIMO modulation technology are overcome. Based on the concept of spatial modulation, the performance of spatial modulation system in MIMO environment is studied in this paper. Based on the research background of spatial modulation technology and the development situation at home and abroad, this paper firstly introduces the principle and system model of spatial modulation, and simulates and analyzes different demodulation algorithms in Rayleigh fading channel. At the same time, the techniques of (SSK) and (GSSK) modulation are studied, and compared with the performance of spatial modulation. Secondly, the error performance of spatial modulation system is theoretically analyzed, and several theoretical analysis methods of space shift keying and spatial modulation are discussed. The theoretical bounds of the performance of spatial modulation in arbitrary MIMO scenes are finally obtained by using an analytical model of error performance analysis for progressive optimization of spatial modulation. The accuracy of this method is verified by simulation. In order to further study the performance characteristics of spatial modulation, the error performance of spatial modulation system in non-Gao Si noise fading channel is studied in this paper. The mixed Gao Si channel model is introduced and the error performance of SM system is analyzed by changing the parameters of the noise model. The simulation results show that spatial modulation has a strong anti-impulse interference capability. In addition, the performance of (VLC) spatial modulation system for visible light communication is analyzed. Based on the Indoor visible Light (LOS) transmission channel model, the optical channel characteristics of visible light communication system (VLC) in indoor MIMO environment are studied. The spatial modulation system is realized by changing the position factors of the LED transmitter and receiver under the visible line-of-sight transmission environment. The performance advantages of the spatial modulation technology in the VLC system are further analyzed.
【学位授予单位】：大连海事大学
【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 郭明喜;贾冲;沈越泓;魏以民;侯兴康;;空间调制技术及其性能仿真[J];军事通信技术;2009年03期
相关博士学位论文 前1条
1 王旭东;非高斯噪声衰落信道中空时编码性能的研究[D];西安电子科技大学;2007年
，本文编号：2219246
本文链接：https://www.wllwen.com/kejilunwen/wltx/2219246.html
