本文選題：FPGA　切入點(diǎn)：基帶信號處理　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】：隨著科學(xué)技術(shù)的日益進(jìn)步,越來越多的電子設(shè)備使用在人類的生活中和現(xiàn)代化戰(zhàn)場上,使空間的電磁環(huán)境變得越來越復(fù)雜,對人類的生活和戰(zhàn)爭的勝負(fù)起到了重要的作用。只有充分了解所處空間的電磁環(huán)境才能更好的利用它,所以對復(fù)雜電磁環(huán)境的研究對人類的生活、科技和軍事的發(fā)展是十分重要的。本文主要介紹了復(fù)雜電磁環(huán)境模擬中基帶信號產(chǎn)生單元的設(shè)計(jì)與實(shí)現(xiàn)。應(yīng)用了任意波模式的基帶信號產(chǎn)生技術(shù)和復(fù)調(diào)制技術(shù),以“DSP+FPGA+DDR2+DA板”為硬件平臺,實(shí)現(xiàn)了單設(shè)備能同時產(chǎn)生最多24路頻率、幅度、調(diào)制方式、碼元速率均可調(diào)的載波調(diào)制信號的基帶信號產(chǎn)生單元。本文根據(jù)軟件無線電的思想提出了復(fù)雜電磁環(huán)境模擬中基帶信號產(chǎn)生單元設(shè)計(jì)的方案。該方案主要包含多速率基帶信號處理與多路載波調(diào)制信號的產(chǎn)生兩部分內(nèi)容。多速率基帶信號處理總共有以下三個模塊:一、DSP與FPGA之間數(shù)據(jù)通路的建立,實(shí)現(xiàn)了DSP與FPGA之間的通信。二、海量高速基帶信號數(shù)據(jù)存取控制器的設(shè)計(jì),利用DDR2 SDRAM存儲器實(shí)現(xiàn)了對基帶信號數(shù)據(jù)的快速存入與讀取操作,完成了對模擬的復(fù)雜電磁環(huán)境中的背景信號可以進(jìn)行回放的功能。三、多速率基帶信號變采樣率處理模塊,利用CIC插值濾波器提高了基帶信號的采樣率,有效抑制了基帶信號的鏡像成分和諧波分量。多路載波調(diào)制信號產(chǎn)生模塊是本文的另一個重點(diǎn),運(yùn)用了復(fù)調(diào)制技術(shù),將經(jīng)過多速率基帶信號處理模塊處理之后的基帶信號與頻率可控的不同頻率的載波信號進(jìn)行復(fù)調(diào)制得到多路載波調(diào)制信號。將得到的多路載波調(diào)制信號上變頻到射頻并通過信號調(diào)理電路便可以對復(fù)雜電磁環(huán)境中的信號進(jìn)行模擬。復(fù)雜電磁環(huán)境模擬中基帶信號產(chǎn)生單元的各個功能模塊均是利用ISE軟件在Xilinx公司的FPGA中進(jìn)行實(shí)現(xiàn)的,有效的節(jié)省了系統(tǒng)的開發(fā)時間。使用ChipScope在線邏輯分析儀和頻譜分析儀測試了每個單元,由最終得到的數(shù)據(jù)可知本文中復(fù)雜電磁環(huán)境模擬中基帶信號產(chǎn)生單元的設(shè)計(jì)滿足預(yù)定的要求。
[Abstract]:With the advances of science and technology, more and more electronic devices used in human life and the modern battlefield, the electromagnetic environment becomes more and more complex, has important effect on human life and the outcome of the war. Only fully understand the space electromagnetic environment in order to better use of it, so on in the complicated electromagnetic environment on human life, the development of science and technology and the military is very important. This paper mainly introduces the design and implementation of baseband signal generation unit in simulation of complex electromagnetic environment. The application of arbitrary wave mode baseband signal generation technology and complex modulation technique to the DSP+FPGA+DDR2+DA board as the hardware platform, realize a single device can simultaneously produce up to 24 frequency, amplitude modulation, baseband signal carrier modulation signal symbol rate can be adjusted for the generating unit according to software. Radio proposed unit design scheme produces baseband signal simulation of complex electromagnetic environment. The scheme mainly includes the multi rate baseband signal processing and multi carrier modulation signal generation part two. Multi rate baseband signal processing a total of the following three modules: first, establish a data path between DSP and FPGA, to achieve communication between DSP and FPGA. Two, the design of massive high-speed baseband signal data access controller, to achieve a rapid deposit of baseband signal and data read operation using the DDR2 SDRAM memory, the background signal simulation of complex electromagnetic environment can playback function. Three, the sampling rate variable rate baseband processing module the signal, using CIC interpolation filter to improve the sampling rate of the baseband signal, can effectively restrain the mirror components of the baseband signal and harmonic components. Multi carrier modulation signal. Module is another focus of this article, the use of complex modulation technology, the multi rate baseband signal processing of baseband signal processing module and frequency controllable after different frequency carrier signal for polyphonic system receive multi carrier modulation signal. The multi carrier modulation signal to a radio frequency signal and can in the complex electromagnetic environment is simulated through the signal conditioning circuit. Each function module of baseband signal generating unit in simulation of complex electromagnetic environment are implemented on FPGA Xilinx, using ISE software, effectively save system development time. Each unit is tested using ChipScope logic analyzer and a spectrum analyzer, design unit by the baseband signal in complex electromagnetic environment simulation data shows that the resulting in meet the predetermined requirements.

【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】：TP333;TN791

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 喬贊麗;;高可靠性SPI通信機(jī)制及其應(yīng)用探討[J];信息通信;2013年08期

相關(guān)碩士學(xué)位論文 前1條

1 成科平;電磁環(huán)境模擬技術(shù)研究[D];西安電子科技大學(xué);2013年

，

本文編號：1595517