学校代码 14199 学号

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本科毕业论文(设计)

MIMO系统的信道容量分析

及Matlab仿真MIMO系统的信道容量分析及Matlab仿真

摘要：MIMO技术是在通信系统的收发两端放置多根天线的一种通信技术。多输入多输出技术是近年来无线通信领域理论研究的一个重大突破。该技术能在不增加系统带宽和发射功率的前提下大大增加系统容量、提高系统频带利用率、改善系统的性能,从而成为新一代高数据率、多数据类型无线通信系统的关键技术。众所周知,信道容量表示一个通信系统的极限传输率。由于对容量分析结果会对实际通信系统的设计提供理论依据和指导。因此,对MIMO系统信道容量的分析无疑是一个重要而基本的研究课题。

本文对MIMO系统进行了研究,主要集中在MIMO系统的信道容量分析。首先从MIMO的概念入手，介绍了当前的无线通信技术。然后围绕MIMO无线通信系统进行了展开，介绍了MIMO技术的基本原理、空时编码技术和MIMO系统的模型与容量。随后对仿真软件MATLAB做了简单的介绍。最后应用MATLAB软件对不同发射天线、不同接收天线、不同信噪比下的MIMO系统容量进行计算机仿真，并对仿真结果进行了分析。

关键字：MIMO技术,信道容量,空时编码,无线通信

Channel capacity of MIMO systems analysis and Matlab simulation

Author ：Bao Yukun

Tutor ：Huang Wei

Abstract：Multiple-input-multiple-output (MIMO) is a communication technology that multiple antennas are set transmitters and receivers. It is an important breakthrough in the area of wireless communication. The system capacity and frequency spectrum efficiency of communication systems can be improved by this technology without extra frequency bandwidth and with no additional power expenditure. MIMO is becoming a key technology of the new generation high data rate wireless mobile communication system. As well known , the channel capacity of a communications system is the limit of the transmission rate. The analysis results of capacity can provide the theoretical basis and guidance to the actual capacity communications system designed. Therefore, the MIMO system channel capacity analysis is an important and basic research topics.

This paper investigates the MIMO system, mainly concentrated in the capacity of the MIMO system. First of all, from the perspective of the concept of MIMO, this paper introduces the current wireless communication technologies. Then revolves around MIMO wireless communication system, introduces the basic principle of MIMO technology space-time coding technique and model a