自适应OFDM技术在矿井特殊环境下的应用研究

发布时间：2018-04-13 13:04

本文选题：自适应OFDM算法 + 矿井通信　；参考：《安徽理工大学》2015年硕士论文

【摘要】：当今国内外矿井地下通信尤其是煤矿井下通信主要是依靠光纤电缆对信号进行传输,具有通信带宽大、信号损失小和通信可靠性强等特点。但同时在井下特殊环境下存在铺设和使用成本高、维护复杂的缺陷。在当今地面通信飞速发展和成熟的背景下,如何设计出一种低成本易维护且性能可靠质量较高的井下通信系统逐渐成为研究的热点。本课题以近年来出现的热门的自适应技术和传统的OFDM技术结合所产生的自适应OFDM资源分配算法为理论基础,提出一种多用户条件下的OFDM调制解调系统试图有效解决井下特殊环境的通信问题。该设计方案成本低且易于实现,经过计算机仿真结果证明达到井下各类通信类型的要求。本文的主要内容如下： 1.通过分析基于实时通信的各类自适应分配算法,以速率自适应分配算法为基础,融合当前矿井通信系统硬件的特点设计了一套通信方案。 2.针对系统基于物理层的设计方案进行计算机仿真测试,通过对系统在不同通信距离参数的调制结果比较,确定系统设计合理可行且易于实现,能够满足井下复杂环境下的各类通信要求。 3.论文提出的自适应OFDM调制解调系统是一种长距离宽带通信系统,目的在于解决井下有线光纤通信系统成本高、难维护的问题。同时也为井下特殊环境通信的稳定性、可靠性和速率等质量要求提供了一种实用的解决方案。对井下特殊环境下通信系统的建设发展具有促进作用。
[Abstract]:Nowadays, underground communication in coal mine, especially in coal mine, mainly relies on optical fiber cable to transmit the signal, which has the characteristics of large communication bandwidth, small signal loss and strong communication reliability.But at the same time in the underground special environment there are many defects such as high cost of laying and using and complex maintenance.Under the background of rapid development and maturity of ground communication, how to design a kind of underground communication system with low cost and easy maintenance and high performance and reliable quality has gradually become a hot research topic.This thesis is based on the adaptive OFDM resource allocation algorithm, which is based on the combination of the popular adaptive technology and the traditional OFDM technology in recent years.A multi-user OFDM modulation and demodulation system is proposed to solve the communication problem of underground special environment.The design is low cost and easy to be realized. The computer simulation results show that it can meet the requirements of all kinds of communication types.The main contents of this paper are as follows:1.By analyzing all kinds of adaptive allocation algorithms based on real-time communication, a communication scheme is designed based on the rate adaptive allocation algorithm and the characteristics of the current mine communication system hardware.2.The computer simulation test is carried out for the system design scheme based on physical layer. By comparing the modulation results of the system in different communication distance parameters, it is determined that the system design is reasonable and feasible and easy to implement.Can meet all kinds of communication requirements in complex underground environment.3.The adaptive OFDM modulation and demodulation system proposed in this paper is a long distance broadband communication system, which aims to solve the problem of high cost and difficult maintenance of underground cable optical fiber communication system.It also provides a practical solution for the stability, reliability and rate of communication in underground special environment.It can promote the construction and development of communication system under special underground environment.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD65

【参考文献】