MIMO信道容量分析及移动终端的WLAN三频段MIMO天线设计方法研究

发布时间：2018-03-11 00:09

本文选题：MIMO　切入点：信道容量　出处：《东南大学》2017年硕士论文　论文类型：学位论文

【摘要】：在无线通信飞速发展的今天,人们对其传输速率和传输可靠性的要求也越来越高,此时,多输入多输出(IMO)系统的出现很好的满足了人们在这方面的要求。简而言之,MIMO系统是通过增加发送与接收端的天线数量,在不增加频谱宽度和发送功率的情况下,成倍的提高无线通信的质量与数据速率。由于MIMO技术在提高无线通信系统容量的上的巨大潜力,其已被或者将要被众多的标准化委员会采用。比如IEEE802.11n,WiMAX,LTE 等等。MIMO系统的信道容量会随着接收端及发送端的最小天线数目的增加而成倍增加,从理论上,可以无限量的增长。但在实际应用中,由于信道相关性的影响,会对MIMO的信道容量产生巨大的影响。本文首先对无线通信系统进行介绍,详细阐述了 SISO信道以及MIMO信道的模型,并对他们的信道容量以及影响信道容量的因素进行了探讨。然后对目前基于移动终端的MIMO天线的发展进行了介绍,并对几种典型的天线结构以及MIMO天线的几个主要参数进行了讨论与仿真。最后设计了一种新型的PIFA结构MIMO天线,这种MIMO天线可以工作在2.4G,5.2G和5.6G三个频段,并有较好的隔离表现。除此之外,我们还对天线的回波损耗,隔离性能,辐射模式以及电流分布进行了分析,并和其他几种目前的多频段MIMO天线进行了性能的比较。
[Abstract]:With the rapid development of wireless communication, the demand for its transmission rate and reliability is becoming higher and higher. The emergence of multi-input and multi-output IMO (multiple input and multiple output) systems meets the requirements of many people in this respect. In short, MIMO systems increase the number of antennas at the transmitter and receiver terminals, without increasing the spectrum width and transmission power. Multiplying the quality and data rate of wireless communications. Due to the huge potential of MIMO technology in improving the capacity of wireless communication systems, It has been or will be adopted by a number of standardization committees. For example, the channel capacity of IEEE 802.11n / WiMAXLTE / LTE / MIMO systems will multiply with the increase of the minimum number of antennas at both the receiver and the sender. However, in practical applications, the channel capacity of MIMO will be greatly affected by the influence of channel correlation. This paper first introduces the wireless communication system. In this paper, the models of SISO channel and MIMO channel are described in detail, and their channel capacity and the factors affecting channel capacity are discussed. Then, the development of MIMO antenna based on mobile terminal is introduced. Several typical antenna structures and several main parameters of MIMO antenna are discussed and simulated. Finally, a new PIFA structure MIMO antenna is designed. The MIMO antenna can work in three frequency bands of 2.4G 5.2G and 5.6G. In addition, we analyze the echo loss, isolation performance, radiation mode and current distribution of the antenna, and compare the performance of the antenna with other multi-band MIMO antennas.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN919.3

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