【摘要】：WIMAX(Worldwide Interoperability for Microwave Access),是一種為企業(yè)和家庭用戶(hù)提供的寬帶無(wú)線(xiàn)連接方案,被稱(chēng)為全球微波互聯(lián)或802.16e無(wú)線(xiàn)城域網(wǎng),它是組成未來(lái)通信技術(shù)重要部分。WIMAX可以提供更遠(yuǎn)的傳輸距離,更高的寬帶接入,更優(yōu)良的接入服務(wù)和更多的多媒體通訊服務(wù),兼具了移動(dòng)寬帶和IP化的特點(diǎn)。目前,WIMAX技術(shù)已經(jīng)使用在各行各業(yè),不斷改變著人們的生活方法,未來(lái)隨著移動(dòng)寬帶應(yīng)用的迅猛發(fā)展,WIMAX將會(huì)迎來(lái)更廣闊的發(fā)展空間。因此通過(guò)研究典型的WIMAX編解碼特點(diǎn)和協(xié)議特征,提出一種實(shí)用的典型WIMAX信道解碼系統(tǒng)方案,解決WIMAX的日常應(yīng)用十分有必要。本文是針對(duì)WIMAX未來(lái)的廣泛應(yīng)用前景,詳細(xì)的分析了WIMAX系統(tǒng)的編碼特點(diǎn)、協(xié)議特征、安全機(jī)制,以及一些系統(tǒng)設(shè)計(jì)問(wèn)題。闡述了其核心OFDMA技術(shù)標(biāo)準(zhǔn)和結(jié)構(gòu)特點(diǎn)。通過(guò)分析WIMAX網(wǎng)絡(luò)層、物理層、接入控制層、認(rèn)證機(jī)制等協(xié)議體系和設(shè)計(jì)的了信號(hào)解調(diào)流程,具體對(duì)FEC、卷積碼、Turbo碼和擾碼的編解碼特點(diǎn)進(jìn)行了深入的研究,設(shè)計(jì)了一種典型的信道解碼方法。為了驗(yàn)證設(shè)計(jì)思路的有效性,同時(shí)開(kāi)展對(duì)原理樣機(jī)的研制。分別完成了系統(tǒng)方案設(shè)計(jì)、射頻方案設(shè)計(jì)、基帶處理板卡方案設(shè)計(jì)、嵌入式控制板卡的選型和軟件方案的設(shè)計(jì)。射頻模塊主要完成模數(shù)/數(shù)模轉(zhuǎn)換,以及天線(xiàn)射頻的發(fā)送接收;基帶處理辦卡主要通過(guò)FPGA和DSP硬件實(shí)現(xiàn)編解碼、調(diào)制解調(diào)等工作;嵌入式控制板卡實(shí)現(xiàn)802.16協(xié)議棧,控制外圍接口、并與基帶處理板卡進(jìn)行信息交互;上層人機(jī)交互界面的實(shí)現(xiàn)顯控功能。通過(guò)軟硬件實(shí)現(xiàn)和集成,最后研制了一套原理樣機(jī),并通過(guò)試驗(yàn)驗(yàn)證,證明了設(shè)計(jì)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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN925.93

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本文編號(hào)：2227280