本文關(guān)鍵詞：基于混合濾波器組的雙通道并行數(shù)據(jù)采集研究　出處：《電子科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 數(shù)據(jù)采集 混合濾波器組 功率互補(bǔ) 遺傳算法 模擬偏差

【摘要】：數(shù)據(jù)采集是數(shù)字信號(hào)與信息處理系統(tǒng)的重要組成模塊。隨著數(shù)字化技術(shù)的快速發(fā)展,高速率高分辨率的模數(shù)轉(zhuǎn)換器(Analog to Digital Converter,ADC)在信息技術(shù)中的各個(gè)領(lǐng)域得到了廣泛的應(yīng)用,系統(tǒng)對(duì)ADC的性能指標(biāo)要求也越來越高。如何實(shí)現(xiàn)高速率高分辨率的數(shù)據(jù)采集系統(tǒng)已經(jīng)成為了國(guó)內(nèi)外的研究熱點(diǎn)。其中基于混合濾波器組的多片ADC并行數(shù)據(jù)采集是一種有效的解決方案,具有廣泛的應(yīng)用前景。本文針對(duì)基于混合濾波器組結(jié)構(gòu)的并行數(shù)據(jù)采集系統(tǒng)進(jìn)行了分析,從工作原理和理論推導(dǎo)方面進(jìn)行基于功率互補(bǔ)結(jié)構(gòu)分解濾波器組優(yōu)化設(shè)計(jì),然后提出了一種優(yōu)化設(shè)計(jì)的實(shí)施方案,通過系統(tǒng)仿真分析,驗(yàn)證了系統(tǒng)的合理性和可實(shí)現(xiàn)性。本文的主要研究?jī)?nèi)容包括:1、針對(duì)基于混合濾波器組的數(shù)據(jù)采集系統(tǒng)進(jìn)行理論分析與推導(dǎo),包括系統(tǒng)的工作原理以及實(shí)現(xiàn)中所涉及到的相關(guān)理論知識(shí)。2、依據(jù)功率互補(bǔ)的準(zhǔn)則,通過相關(guān)約束條件,推導(dǎo)出五階模擬分解濾波器組系統(tǒng)傳遞函數(shù)系數(shù)的約束公式,優(yōu)化目標(biāo)函數(shù)。利用遺傳算法求得系數(shù)最優(yōu)解,最終實(shí)現(xiàn)模擬分解濾波器組的優(yōu)化設(shè)計(jì)。3、闡述數(shù)字綜合濾波器組的優(yōu)化設(shè)計(jì)理論,根據(jù)系統(tǒng)完全重構(gòu)原則,求解出數(shù)字濾波器組的頻率響應(yīng),根據(jù)傅里葉逆變換計(jì)算出數(shù)字綜合濾波器的系數(shù),并且在FPGA中應(yīng)用多相結(jié)構(gòu)優(yōu)化改進(jìn)數(shù)字綜合濾波器組的實(shí)現(xiàn)方式。4、仿真分析系統(tǒng)物理實(shí)現(xiàn)中的模擬偏差,通過對(duì)分解濾波器的系統(tǒng)傳遞函數(shù)建立誤差模型,經(jīng)過理論推導(dǎo)并且引入信號(hào)測(cè)試,測(cè)量出具體的模擬偏差系數(shù)。再次依據(jù)系統(tǒng)完全重構(gòu)原則優(yōu)化求解出數(shù)字綜合濾波器組的系數(shù)。5、最終優(yōu)化設(shè)計(jì)出基于混合濾波器組的兩通道并行數(shù)據(jù)采集系統(tǒng),通過對(duì)系統(tǒng)的指標(biāo)和引入信號(hào)的仿真測(cè)試結(jié)果分析,系統(tǒng)有效位數(shù)可以達(dá)到12 bits,可滿足高速高精度的數(shù)據(jù)采集要求。
[Abstract]:Data acquisition is an important module of digital signal and information processing system. With the rapid development of digital technology. Analog to Digital converter (Analog to Digital converter) with high speed and high resolution has been widely used in various fields of information technology. The performance requirements of ADC are becoming higher and higher. How to realize the data acquisition system with high speed and high resolution has become a hot topic at home and abroad. Among them, the parallel number of multi-chip ADC based on hybrid filter banks is becoming more and more important. Data acquisition is an effective solution. This paper analyzes the parallel data acquisition system based on hybrid filter bank structure. The optimal design of the filter bank based on the power complementary structure decomposition filter bank is carried out in terms of working principle and theoretical derivation, and then an implementation scheme of the optimal design is proposed, which is analyzed by system simulation. The rationality and realizability of the system are verified. The main research contents of this paper include: 1. The theoretical analysis and derivation of the data acquisition system based on hybrid filter banks are carried out. Including the working principle of the system and the related theoretical knowledge. 2, according to the principle of power complementary, through the relevant constraints. The constraint formula of transfer function coefficient of the fifth order analogue decomposition filter bank system is derived to optimize the objective function. The optimal solution of the coefficient is obtained by using genetic algorithm, and the optimal design of the filter bank of analog decomposition filter bank is realized finally. 3. The optimal design theory of digital synthetic filter banks is expounded. According to the principle of complete system reconstruction, the frequency response of digital filter banks is solved, and the coefficients of digital integrated filters are calculated according to the inverse Fourier transform. And in FPGA, the realization mode of digital synthesis filter bank is improved by using polyphase structure optimization. 4, and the analog deviation in the physical realization of the system is analyzed by simulation. The error model of the system transfer function of the decomposition filter is established, and the signal test is introduced through theoretical derivation. The specific coefficient of analog deviation is measured, and the coefficient of digital synthetic filter bank is optimized according to the principle of complete reconstruction of the system. Finally, a two-channel parallel data acquisition system based on hybrid filter banks is designed. The effective bit number of the system can reach 12 bits by analyzing the index of the system and the simulation test results of the introduced signal. It can meet the requirement of high speed and high precision data acquisition.
【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】：2015
【分類號(hào)】：TP274.2;TN713
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本文編號(hào)：1405135