【摘要】：同步技術(shù)是調(diào)整通信網(wǎng)中的各種信號使之協(xié)同工作的技術(shù)。所有信號協(xié)同工作是通信網(wǎng)正常傳輸信息的基礎(chǔ)。同步技術(shù)是OFDM中的一項關(guān)鍵技術(shù)和難點技術(shù)。但由于無線信道的隨機(jī)性，傳統(tǒng)方法在門限設(shè)定上無法兼顧判斷準(zhǔn)確性和計算復(fù)雜度兩方面性能。在此基礎(chǔ)上,分析了同步技術(shù)的時域和頻域兩方面，詳細(xì)闡述了時域和頻域兩方面的關(guān)鍵算法和詳細(xì)的硬件實現(xiàn)方案以及代碼仿真。 隨著Internet商業(yè)化所帶動的視頻、音頻以及數(shù)字通信的發(fā)展，人們對無線通信寄予了更高的期望，下一代無線通信系統(tǒng)面臨著越來越嚴(yán)峻的挑戰(zhàn)。解決大量用戶的大容量通信需求和有限的頻譜資源供給之間的矛盾,以正交頻分復(fù)用(Orthogonal Frequency DivisionMultiplexing,OFDM)技術(shù)為代表的技術(shù)得到了學(xué)術(shù)界和工業(yè)界的關(guān)注和研究,并被廣泛接受為下一代無線通信系統(tǒng)的首選架構(gòu)。 NGB-W是英文Next Generation Broadcasting wireless network的縮略語簡稱，意為下一代無線廣播電視網(wǎng)。NGB-W以有線電視網(wǎng)數(shù)字化整體轉(zhuǎn)換和移動多媒體廣播電視（CMMB）的成果為基礎(chǔ)，以自主創(chuàng)新的高性能寬帶信息網(wǎng)核心技術(shù)為支撐，，構(gòu)建的適合我國國情的、三網(wǎng)融合的、有線無線相結(jié)合的、全程全網(wǎng)的下一代廣播電視網(wǎng)絡(luò)。NGB-W是以自主知識產(chǎn)權(quán)技術(shù)標(biāo)準(zhǔn)為核心的、可同時傳輸數(shù)字和模擬信號的、具備雙向交互、組播、推送播存和廣播四種工作模式的、可管可控可信的、全程全網(wǎng)的寬帶交互式下一代無線廣播電視網(wǎng)絡(luò)。 本論文以NGB-W無線通信系統(tǒng)中的時間、頻率同步硬件FPGA實現(xiàn)問題做為主要研究對象，詳細(xì)的描述了算法以及硬件實現(xiàn)方案，以及硬件實現(xiàn)的仿真。
[Abstract]:Synchronization technology is the technology that adjusts the various signals in the communication network to make it work together. The cooperative work of all signals is the basis for normal transmission of information in communication networks. Synchronization is a key and difficult technique in OFDM. However, due to the randomness of wireless channel, the traditional method can not meet the performance of accuracy and computational complexity in threshold setting. On this basis, the time domain and frequency domain of synchronization technology are analyzed, and the key algorithms, hardware implementation scheme and code simulation in time domain and frequency domain are described in detail. With the development of video, audio and digital communication driven by the commercialization of Internet, people place higher expectations on wireless communication, and the next generation wireless communication system is facing more and more serious challenges. To solve the contradiction between the large capacity communication demand of a large number of users and the limited supply of spectrum resources, the technology represented by orthogonal Frequency Division Multiplexing (Orthogonal Frequency DivisionMultiplexing,OFDM) technology has been paid attention to and studied by academia and industry. And is widely accepted as the next-generation wireless communication system preferred architecture. NGB-W is the acronym of English Next Generation Broadcasting wireless network, which means the next generation of radio and television network. NGB-W is based on the digital conversion of cable television network and the achievement of mobile multimedia broadcast television (CMMB). Supported by the core technology of the independent innovation of the high performance broadband information network, it is suitable for the national conditions of our country, the three networks are integrated, and the wired and wireless networks are combined. The next generation broadcast television network of whole network. NGB-W is based on independent intellectual property technology standard, can transmit digital and analog signal simultaneously, has four working modes of two-way interaction, multicast, push broadcast and broadcast. Can manage controllable credible, whole-range wide-band interactive next-generation radio and television network. In this paper, the time and frequency synchronization hardware FPGA implementation in NGB-W wireless communication system is taken as the main research object. The algorithm, hardware implementation scheme and hardware implementation simulation are described in detail.
【學(xué)位授予單位】：南昌航空大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN919.34

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 張宇;MIMO-OFDM系統(tǒng)信道估計與同步技術(shù)的研究[D];哈爾濱工業(yè)大學(xué);2010年

本文編號：2398001