摘要4G（第四代移动通信技术）是3G技术的进一步演化，集3G与WLAN于一体并能传输不下于高清晰度电视的高质量视频图像。4G的关键技术之一是正交频分复用（OFDM），它是多载波调制方式的一种，将信道分成若干正交子信道，把高速信号流转化成并行低速的子信号流，调制在子信道上传输，从而减少子信道之间的干扰。65995

本文首先介绍了历代通信系统所使用的多址技术和双工模式，分析其优劣，并着重介绍了自适应技术和MIMO-OFDM技术。多用户MIMO-OFDM系统实时业务的资源分配必须保证每个用户的传输速率和误码率需求，并受系统总功率恒定的约束。本文第三章针对多用户MIMO-OFDM系统的中断概率提出了一种资源分配算法，在保证系统总功率不变的情况下，极小化系统中断概率，同时保证系统吞吐量和误码率需求，最后通过MATLAB进行仿真，与一种现有算法进行对比分析。

毕业论文关键字：MIMO-OFDM，资源分配，自适应

毕业设计说明书（论文）外文摘要

Title Research on resource allocation technology for 

Multi-user MIMO - OFDM system

Abstract

4G(4th generation mobile communication technology) is the next generation of 3G technology, which integrated 3G and WLAN. Moreover, 4G can transmit higher quality video images than high-definition TV. One of 4G’s significant improvements is the orthogonal frequency pision multiplexing (OFDM), which is a type of multicarrier modulation method. It pides channel signals into several orthogonal sub-channels. Additionally, it transforms the high-speed signal into parallel low-speed sub-signals in order to modulate and transmit on the sub-channels. Therefore, it reduces the interference of sub-channels.

In this report, firstly, we will state multiple access technologies and duplex modes，which are used in every generation of communication system. In addition, we analyze advantages and disadvantages of these technologies. Further, we emphatically introduce the adaptive technology and MIMO - OFDM technology. Multi-user MIMO - OFDM systems real-time business resource allocation must ensure that each user's transmission rate and BER requirements, and bound by the system total power constant. Secondly, in the third chapter of this report, a resource allocation algorithm to the outage probability of multi-user MIMO - OFDM system is proposed. Under the condition of invariable system total power, it minimized the system outage probability, and ensured the system throughput and BER requirements at the same time. Finally, it is compared with an existing algorithm through the MATLAB simulation and analyzed afterwards.

Keywords: MIMO-OFDM, resource allocation, adaptive

目录

第一章  绪论 1

1.1  无线通信系统研究背景 1

1.1.1  第一代无线通信系统 1

1.1.2  第二代无线通信系统 2

1.1.3  第三代无线通信系统 3

1.1.4  第四代无线通信系统 5

1.2  无线信道特性 5

1.3  内容安排 6

第二章  MIMO-OFDM系统的资源分配 7

2.1  多用户MIMO-OFDM系统关键技术 7

2.1.1  OFDM技术概述 7

2.1.2  MIMO技术概述 9

2.1.3  空间分集与空间复用