WIMAX信道解码系统的设计与实现
发布时间：2018-09-06 19:16
【摘要】：WIMAX(Worldwide Interoperability for Microwave Access),是一种为企业和家庭用户提供的宽带无线连接方案,被称为全球微波互联或802.16e无线城域网,它是组成未来通信技术重要部分。WIMAX可以提供更远的传输距离,更高的宽带接入,更优良的接入服务和更多的多媒体通讯服务,兼具了移动宽带和IP化的特点。目前,WIMAX技术已经使用在各行各业,不断改变着人们的生活方法,未来随着移动宽带应用的迅猛发展,WIMAX将会迎来更广阔的发展空间。因此通过研究典型的WIMAX编解码特点和协议特征,提出一种实用的典型WIMAX信道解码系统方案,解决WIMAX的日常应用十分有必要。本文是针对WIMAX未来的广泛应用前景,详细的分析了WIMAX系统的编码特点、协议特征、安全机制,以及一些系统设计问题。阐述了其核心OFDMA技术标准和结构特点。通过分析WIMAX网络层、物理层、接入控制层、认证机制等协议体系和设计的了信号解调流程,具体对FEC、卷积码、Turbo码和扰码的编解码特点进行了深入的研究,设计了一种典型的信道解码方法。为了验证设计思路的有效性,同时开展对原理样机的研制。分别完成了系统方案设计、射频方案设计、基带处理板卡方案设计、嵌入式控制板卡的选型和软件方案的设计。射频模块主要完成模数/数模转换,以及天线射频的发送接收;基带处理办卡主要通过FPGA和DSP硬件实现编解码、调制解调等工作;嵌入式控制板卡实现802.16协议栈,控制外围接口、并与基带处理板卡进行信息交互;上层人机交互界面的实现显控功能。通过软硬件实现和集成,最后研制了一套原理样机,并通过试验验证,证明了设计思路的可行性。
[Abstract]:WIMAX (Worldwide Interoperability for Microwave Access), is a broadband wireless connection scheme for enterprises and home users. It is called global microwave interconnection or 802.16e wireless metropolitan area network. It is an important part of future communication technology. WIMAX can provide further transmission distance. Higher broadband access, better access services and more multimedia communication services, both mobile broadband and IP features. At present, WIMAX technology has been used in various industries, constantly changing people's living methods. With the rapid development of mobile broadband applications in the future, WIMAX will ushered in a broader development space. Therefore, by studying the typical WIMAX codec characteristics and protocol features, a practical scheme of typical WIMAX channel decoding system is proposed, which is very necessary to solve the daily application of WIMAX. Aiming at the prospect of WIMAX application in the future, this paper analyzes in detail the coding characteristics, protocol features, security mechanism and some system design problems of WIMAX system. The technical standard and structure characteristics of its core OFDMA are described. By analyzing the protocol system of WIMAX network layer, physical layer, access control layer, authentication mechanism and so on, the signal demodulation flow is designed, and the coding and decoding characteristics of FEC, convolutional code and scrambling code are studied in detail. A typical channel decoding method is designed. In order to verify the validity of the design idea, a prototype of the principle was developed at the same time. The system scheme design, radio frequency scheme design, baseband processing card scheme design, embedded control board card selection and software design are completed respectively. RF module mainly completes A / D conversion and antenna RF transmission and reception; Baseband processing card mainly through FPGA and DSP hardware to achieve coding and decoding, modulation and demodulation; embedded control board to achieve 802.16 protocol stack, The peripheral interface is controlled and the information is exchanged with the baseband processing board, and the display and control function of the upper man-machine interface is realized. Finally, a set of principle prototype is developed through the realization and integration of software and hardware, and the feasibility of the design idea is proved by the experiment.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925.93
本文编号：2227280
[Abstract]:WIMAX (Worldwide Interoperability for Microwave Access), is a broadband wireless connection scheme for enterprises and home users. It is called global microwave interconnection or 802.16e wireless metropolitan area network. It is an important part of future communication technology. WIMAX can provide further transmission distance. Higher broadband access, better access services and more multimedia communication services, both mobile broadband and IP features. At present, WIMAX technology has been used in various industries, constantly changing people's living methods. With the rapid development of mobile broadband applications in the future, WIMAX will ushered in a broader development space. Therefore, by studying the typical WIMAX codec characteristics and protocol features, a practical scheme of typical WIMAX channel decoding system is proposed, which is very necessary to solve the daily application of WIMAX. Aiming at the prospect of WIMAX application in the future, this paper analyzes in detail the coding characteristics, protocol features, security mechanism and some system design problems of WIMAX system. The technical standard and structure characteristics of its core OFDMA are described. By analyzing the protocol system of WIMAX network layer, physical layer, access control layer, authentication mechanism and so on, the signal demodulation flow is designed, and the coding and decoding characteristics of FEC, convolutional code and scrambling code are studied in detail. A typical channel decoding method is designed. In order to verify the validity of the design idea, a prototype of the principle was developed at the same time. The system scheme design, radio frequency scheme design, baseband processing card scheme design, embedded control board card selection and software design are completed respectively. RF module mainly completes A / D conversion and antenna RF transmission and reception; Baseband processing card mainly through FPGA and DSP hardware to achieve coding and decoding, modulation and demodulation; embedded control board to achieve 802.16 protocol stack, The peripheral interface is controlled and the information is exchanged with the baseband processing board, and the display and control function of the upper man-machine interface is realized. Finally, a set of principle prototype is developed through the realization and integration of software and hardware, and the feasibility of the design idea is proved by the experiment.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925.93
【参考文献】
相关硕士学位论文 前1条
1 银庆宏;一种自适应Viterbi译码算法的研究与实现[D];国防科学技术大学;2010年
，本文编号：2227280
本文链接：https://www.wllwen.com/kejilunwen/wltx/2227280.html
