本文選題：頻譜分析 + 數(shù)字中頻�。� 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：在現(xiàn)代電子測量儀器中,頻譜分析儀被廣泛應(yīng)用于電子通信、科研生產(chǎn)、航空航天、應(yīng)用教學(xué)等諸多領(lǐng)域。隨著數(shù)字處理技術(shù)與嵌入式應(yīng)用的快速發(fā)展,頻譜分析儀也在朝著數(shù)字化、小型化、智能化發(fā)展。論文設(shè)計了一種基于ARM+FPGA+DSP結(jié)構(gòu)的1.5GHz頻譜分析儀中頻硬件平臺,包括由FPGA和DSP組成的數(shù)字中頻處理模塊設(shè)計、以ARM為主控處理器的嵌入式顯控模塊設(shè)計。數(shù)字中頻處理模塊設(shè)計主要由信號調(diào)理及采樣通道設(shè)計、數(shù)字中頻電路設(shè)計、數(shù)字中頻接口邏輯電路設(shè)計以及板級電源設(shè)計組成。板級電源為中頻硬件平臺提供穩(wěn)定高效的電源電路;由射頻輸出的固定中頻信號需要經(jīng)過增益放大、抗混疊濾波等信號調(diào)理后,量化為數(shù)字中頻信號;邏輯處理單元FPGA和協(xié)處理器DSP通過數(shù)據(jù)接口邏輯電路協(xié)同工作,共同完成被測信號的頻譜/解調(diào)信息獲取、整機(jī)的命令解析;最后,邏輯處理單元FPGA通過頻譜數(shù)據(jù)及命令接口邏輯電路,實(shí)現(xiàn)中頻模塊與顯控模塊之間的數(shù)據(jù)及命令通信。顯控模塊設(shè)計主要包括頻譜數(shù)據(jù)及命令緩沖驅(qū)動設(shè)計、頻譜分析儀顯示單元電路設(shè)計以及多種儀器外設(shè)接口電路設(shè)計。顯控模塊嵌入式平臺采用了Win CE操作系統(tǒng),該操作系統(tǒng)下的應(yīng)用程序通過頻譜數(shù)據(jù)及命令接口驅(qū)動的設(shè)計,實(shí)現(xiàn)對中頻模塊的數(shù)據(jù)及命令的讀寫訪問。儀器測量信息的實(shí)時顯示采用了標(biāo)準(zhǔn)顯示與擴(kuò)展顯示接口兩種顯示方式,其中標(biāo)準(zhǔn)顯示為LCD液晶屏顯示,擴(kuò)展顯示則通過顯示刷新緩存電路的設(shè)計,實(shí)現(xiàn)了VGA顯示接口。除此之外,顯控模塊還實(shí)現(xiàn)了頻譜分析儀的全部儀器接口,包括網(wǎng)口、串行接口、USB接口等等。論文通過對頻譜分析儀中頻模塊的兩個功能模塊硬件電路設(shè)計測試和整機(jī)性能測試,驗(yàn)證了本課題論文設(shè)計方案的正確性,論文設(shè)計的硬件電路性能指標(biāo)達(dá)到了設(shè)計預(yù)期。
[Abstract]:In modern electronic measuring instruments, spectrum analyzer is widely used in many fields, such as electronic communication, scientific research and production, aerospace, application teaching and so on. With the rapid development of digital processing technology and embedded application, spectrum analyzer is developing towards digitalization, miniaturization and intelligence. In this paper, a 1.5 GHz spectrum analyzer hardware platform based on arm FPGA DSP architecture is designed, including the design of digital if processing module composed of FPGA and DSP, and the design of embedded display and control module with arm as the main processor. The design of digital intermediate frequency processing module is mainly composed of signal conditioning and sampling channel design, digital if circuit design, digital intermediate frequency interface logic circuit design and board level power supply design. The board power supply provides a stable and efficient power supply circuit for the if hardware platform, and the fixed intermediate frequency signal output by RF needs to be processed by gain amplification, anti-aliasing filtering and other signals, and then quantized to digital if signal. The logic processing unit FPGA and the coprocessor DSP work together through the data interface logic circuit to obtain the spectrum / demodulation information of the signal under test and analyze the command of the whole machine. Logic processing unit FPGA realizes data and command communication between if module and display module through spectrum data and command interface logic circuit. The design of display and control module mainly includes the design of spectrum data and command buffer drive, the circuit design of display unit of spectrum analyzer and the design of interface circuit of various instruments. The embedded platform of display and control module adopts WinCE operating system. The application program in this operating system can read and write the data and commands of if module through the design of spectrum data and command interface driver. The real-time display of instrument measurement information adopts two kinds of display modes: standard display and extended display interface. The standard display is LCD LCD display, and the extended display realizes VGA display interface through the design of display refresh buffer circuit. In addition, the display and control module also realizes all the instrument interfaces of spectrum analyzer, including network port, serial interface and USB interface. This paper verifies the correctness of the design scheme of this thesis by testing the hardware circuit design of two functional modules of the if module of the spectrum analyzer and the performance test of the whole machine. The performance index of the hardware circuit designed in this paper has reached the design expectation.
【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

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 黨曉輝;謝華;戴志堅;;基于WinCE的I/O控制軟件設(shè)計[J];電子測量技術(shù);2009年09期

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本文編號：2085877