本文選題：軟件無線電　切入點：GNURadio　出處：《北京郵電大學》2014年碩士論文　論文類型：學位論文

【摘要】：最近三十多年來,無線移動通信領域發(fā)展迅速。軟件無線電自1992年由于軍事通信需要被提出以來,從理論發(fā)展到了實際平臺。簡單地說,軟件無線電就是指在硬件平臺上,采用軟件編程來實現(xiàn)通信的一種新的無線電技術(shù)。目前使用最廣泛的軟件無線電平臺是GNURadio和USRP的組合口 正交頻分復用OFDM是一種特殊的多載波調(diào)制方式。OFDM的優(yōu)點是可以有效的對抗符號間干擾,頻譜效率很高。缺點是對定時和頻率偏移敏感,峰均比較大。現(xiàn)在OFDM已經(jīng)是4G標準的核心技術(shù),在移動通信系統(tǒng)的應用勢在必行。 本文研究平臺是GNURadio和USRP平臺,研究對象是OFDM系統(tǒng)。通過分析軟件無線電平臺的結(jié)構(gòu)和OFDM的基本原理,實現(xiàn)了在GNURadio和USRP平臺上實現(xiàn)OFDM收發(fā)系統(tǒng),并對實際測量結(jié)果進行分析。進行數(shù)據(jù)包發(fā)送接收測量時,通過添加信道編碼模塊提高了系統(tǒng)的可靠性；在平臺上實現(xiàn)了能量檢測算法,測量頻譜占用情況；最后使用m序列相關(guān)法,通過發(fā)送m序列與接收信號做相關(guān)運算,測量出室內(nèi)的信道響應。
[Abstract]:In recent 30 years, the field of wireless mobile communication has developed rapidly. Software radio has been developed from theory to practical platform since 1992 because of the need of military communication. A new radio technology for communication using software programming. The most widely used software radio platform is the combined port of GNURadio and USRP. Orthogonal Frequency Division Multiplexing (OFDM) is a special multicarrier modulation method. The advantage of OFDM is that it can effectively resist inter-symbol interference, and the spectrum efficiency is very high, but the disadvantage is that it is sensitive to timing and frequency offset. Now OFDM is the core technology of 4G standard, so it is imperative to apply it in mobile communication system. The research platform of this paper is GNURadio and USRP, and the research object is OFDM system. By analyzing the structure of software radio platform and the basic principle of OFDM, the OFDM transceiver system is realized on GNURadio and USRP platform. The reliability of the system is improved by adding the channel coding module, and the energy detection algorithm is implemented on the platform to measure the spectrum occupation. Finally, the channel response is measured by using m sequence correlation method and correlation operation between m sequence and received signal.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.53

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本文編號：1611972