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  本文關(guān)鍵詞： 實時頻譜 抽取濾波 快速傅里葉變換 幀重疊 FPGA　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：在野外環(huán)境下,為了建立快速、可靠的通信,需要對信號頻譜進行實時監(jiān)測分析。這樣就對頻譜監(jiān)測設(shè)備的便攜性以及頻譜分析的方式提出了新的要求。目前,大多數(shù)頻譜監(jiān)測設(shè)備采用掃頻式的處理方式,且體積龐大,不易攜帶。而手持式軟件無線電平臺具有易攜帶、頻譜分析方式軟件可重構(gòu)等特點。因此,論文利用該平臺優(yōu)勢,設(shè)計并實現(xiàn)了實時頻譜分析功能,具體包括:第一,分析了實時頻譜分析算法。結(jié)合平臺硬件架構(gòu)及項目需求,設(shè)計了一種結(jié)合抽取濾波、快速傅里葉變換、幀重疊和模板觸發(fā)等技術(shù)的算法方案,并對算法進行了MATLAB仿真驗證。第二,實現(xiàn)了軟件設(shè)計方案。根據(jù)實時頻譜分析算法方案和手持式軟件無線電硬件平臺特點,在FPGA上完成了功能模塊及接口設(shè)計,并用Model Sim對模塊進行了行為級仿真。第三,完成了實時頻譜的測試與分析。在手持式軟件無線電平臺上,首先針對實時頻譜分析的功能模塊及接口進行了測試與分析,并在Android下調(diào)試了實時頻譜分析軟件;然后對頻率監(jiān)測范圍及誤差、功率監(jiān)測范圍及誤差進行了測試與分析。通過測試,可以對225MHz~400MHz頻率范圍內(nèi)的信號,完成2MHz的實時帶寬分析;信號功率監(jiān)測范圍:?90 d Bm~0 d Bm,最小頻率分辨率50Hz,信號頻率誤差?3PPM,功率誤差?3d Bm。論文在手持式軟件無線電平臺上設(shè)計并實現(xiàn)了實時頻譜分析功能,實際測試表明該方案可在野外環(huán)境下,更加便攜的對信號進行實時頻譜監(jiān)測。
[Abstract]:In the field environment, in order to establish fast and reliable communication, it is necessary to monitor and analyze the signal spectrum in real time. Most of the spectrum monitoring equipments adopt frequency sweeping processing, which is huge and difficult to carry. The portable software radio platform is easy to carry and the spectrum analysis software can be reconfigurable. Therefore, this paper makes use of the advantages of the platform. The function of real-time spectrum analysis is designed and realized. Firstly, the algorithm of real-time spectrum analysis is analyzed. The algorithm scheme of frame overlap and template trigger is implemented, and the algorithm is verified by MATLAB simulation. Secondly, the software design scheme is implemented. According to the algorithm of real-time spectrum analysis and the hardware platform of hand-held software radio, The design of function module and interface on FPGA is completed, and the behavioral level simulation of the module is carried out with Model Sim. Thirdly, the real-time spectrum is tested and analyzed. First of all, the function module and interface of real-time spectrum analysis are tested and analyzed, and the real-time spectrum analysis software is debugged under Android, and then the frequency monitoring range and error are analyzed. The range and error of power monitoring are tested and analyzed. By testing, the signal in the frequency range of 225MHz can be analyzed in real time bandwidth at 2MHz. 90d Bm~0 dBm, minimum frequency resolution 50Hz, signal frequency error? 3PPM, power error? The paper designs and realizes the real-time spectrum analysis function on the handheld software radio platform. The actual test shows that this scheme can monitor the real-time spectrum of the signal more conveniently in the field environment.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM935.21

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相關(guān)期刊論文 前1條

1 劉玉軍;吳小東;王東楊;劉雪玲;姜美雷;;實時頻譜分析原理與應(yīng)用[J];現(xiàn)代儀器;2009年02期

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本文編號：1523328