本文選題：PSpice軟件 + mG?C帶通濾波器　； 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：論文研究并測試全新的小波實(shí)現(xiàn)步驟:小波變換理論推導(dǎo)從而找到使用硬件實(shí)現(xiàn)的可能性—頻域法模擬電路測試貼近小波變換—測試盒調(diào)整濾波器帶通特性—濾波器組實(shí)現(xiàn)變換,通過嚴(yán)謹(jǐn)?shù)睦碚摲治龊头磸?fù)的實(shí)踐操作,最終用由通道濾波器組構(gòu)成的集成電路實(shí)現(xiàn)了小波變換信號濾波效果并通過檢驗(yàn)。論文主要包括以下工作:(1)通過理論推導(dǎo)發(fā)現(xiàn)了小波變化的函數(shù)理論與濾波器的濾波過程高度一致,使得用模擬電路的濾波過程實(shí)現(xiàn)小波變換成為可能,進(jìn)一步研究了實(shí)現(xiàn)連續(xù)變換的科學(xué)方法。(2)詳細(xì)用函數(shù)演變的方法從理論角度推算小波變換的模擬步驟,針對小波變換的濾波器組件實(shí)現(xiàn)分別研究了不同種類的小波并針對性的選擇初步實(shí)現(xiàn)圖像處理的目標(biāo)小波。(3)詳細(xì)研究和對比了PSpice軟件模擬電路結(jié)構(gòu)和小波變換的過程。找到了PSpice軟件在模擬階段的頻域特性、帶寬精度和性價(jià)比三大解決方案,給出了基于復(fù)解調(diào)技術(shù)的連續(xù)小波變換頻域法實(shí)現(xiàn)結(jié)構(gòu)框圖。(4)論文集中研究電流模式電路及mG?C帶通濾波器,設(shè)計(jì)了中心頻率可調(diào)的mG?C連續(xù)時(shí)間的二階帶通濾波器。論文研究和設(shè)計(jì)了片內(nèi)自校正環(huán)節(jié)使得濾波器參數(shù)能自動調(diào)諧,保持了二階帶通濾波器初始賦值的計(jì)算準(zhǔn)確,減少了誤差,滿足設(shè)計(jì)標(biāo)準(zhǔn)值在不同分析階段都能保持基準(zhǔn)值的預(yù)期,擴(kuò)大了跨導(dǎo)輸入級的傳輸特性,研究出能促進(jìn)輸入級傳輸特性線性程度改善的模式,獲得了線性范圍擴(kuò)大的理想結(jié)果。(5)論文研究了串行和并行的濾波器組結(jié)構(gòu),設(shè)計(jì)了由并行通道濾波器組構(gòu)成的集成電路,最后結(jié)合Matlab軟件和PSpice軟件實(shí)現(xiàn)小波變換的仿真模擬。為了更好的驗(yàn)證工程上的應(yīng)用,用圖像邊緣處理的方式驗(yàn)證小波變換仿真模擬的實(shí)用性。
[Abstract]:This paper studies and tests a new wavelet realization step: wavelet transform theory derivation to find out the possibility of using hardware to realize the frequency domain analog circuit test close to wavelet transform-test box adjust filter bandpass characteristic-filter The wave-group implements the transformation, Through rigorous theoretical analysis and repeated practice, the wavelet transform signal filtering effect is realized with the integrated circuit composed of channel filter banks and tested. This paper mainly includes the following work: (1) through the theoretical derivation, it is found that the function theory of wavelet variation is highly consistent with the filtering process of the filter, which makes it possible to realize wavelet transform with the filter process of analog circuit. In this paper, the scientific method of realizing continuous transformation is studied in detail. The simulation steps of wavelet transform are calculated from the theoretical point of view by the method of function evolution. Aiming at the realization of filter components of wavelet transform, different kinds of wavelets are studied and the target wavelet of image processing is selected. (3) the structure of analog circuit and the process of wavelet transform of PSpice software are studied and compared in detail. In this paper, three solutions of PSpice software in frequency domain, bandwidth accuracy and cost performance ratio are found. The structure block diagram of frequency domain of continuous wavelet transform based on complex demodulation technique is presented. In this paper, the current mode circuit and mG?C bandpass filter are studied, and the second order bandpass filter with mG?C continuous time with adjustable center frequency is designed. In this paper, the on-chip self-tuning link is designed to automatically tune the filter parameters, which keeps the calculation accuracy of the initial assignment of the second-order band-pass filter and reduces the error. It meets the expectation that the design standard value can maintain the reference value in different analysis stages, expands the transmission characteristics of the transconductance input stage, and studies the mode that can improve the linearity of the input stage transmission characteristics. In this paper, the serial and parallel filter bank structures are studied, and the integrated circuit composed of parallel channel filter banks is designed. Finally, the simulation of wavelet transform is realized with Matlab software and PSpice software. In order to better verify the application in engineering, the practicability of wavelet transform simulation is verified by image edge processing.
【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】：2015
【分類號】：TN713

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