發(fā)布時(shí)間：2018-02-22 01:30

  本文關(guān)鍵詞： 實(shí)時(shí)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(duì)信號(hào)頻譜進(jìn)行實(shí)時(shí)監(jiān)測(cè)分析。這樣就對(duì)頻譜監(jiān)測(cè)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(cè)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(tái)具有易攜帶、頻譜分析方式軟件可重構(gòu)等特點(diǎn)。因此,論文利用該平臺(tái)優(yōu)勢(shì),設(shè)計(jì)并實(shí)現(xiàn)了實(shí)時(shí)頻譜分析功能,具體包括:第一,分析了實(shí)時(shí)頻譜分析算法。結(jié)合平臺(tái)硬件架構(gòu)及項(xiàng)目需求,設(shè)計(jì)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(duì)算法進(jìn)行了MATLAB仿真驗(yàn)證。第二,實(shí)現(xiàn)了軟件設(shè)計(jì)方案。根據(jù)實(shí)時(shí)頻譜分析算法方案和手持式軟件無線電硬件平臺(tái)特點(diǎn),在FPGA上完成了功能模塊及接口設(shè)計(jì),并用Model Sim對(duì)模塊進(jìn)行了行為級(jí)仿真。第三,完成了實(shí)時(shí)頻譜的測(cè)試與分析。在手持式軟件無線電平臺(tái)上,首先針對(duì)實(shí)時(shí)頻譜分析的功能模塊及接口進(jìn)行了測(cè)試與分析,并在Android下調(diào)試了實(shí)時(shí)頻譜分析軟件;然后對(duì)頻率監(jiān)測(cè)范圍及誤差、功率監(jiān)測(cè)范圍及誤差進(jìn)行了測(cè)試與分析。通過測(cè)試,可以對(duì)225MHz~400MHz頻率范圍內(nèi)的信號(hào),完成2MHz的實(shí)時(shí)帶寬分析;信號(hào)功率監(jiān)測(cè)范圍:?90 d Bm~0 d Bm,最小頻率分辨率50Hz,信號(hào)頻率誤差?3PPM,功率誤差?3d Bm。論文在手持式軟件無線電平臺(tái)上設(shè)計(jì)并實(shí)現(xiàn)了實(shí)時(shí)頻譜分析功能,實(shí)際測(cè)試表明該方案可在野外環(huán)境下,更加便攜的對(duì)信號(hào)進(jìn)行實(shí)時(shí)頻譜監(jiān)測(cè)。
[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(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM935.21

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本文編號(hào)：1523328