quadrature filter 中文意思是什麼

quadrature filter 解釋
正交濾波器
  • quadrature : n. 1. 【數學】求積分，求面積。2. 【天文學】矩；（月的）上[下]弦；方照。3. 【物理學】正交；轉象差；九十度相位差。
  • filter : n 1 濾器，濾紙，過濾用料[砂、炭等]。2 【無線電】濾波器；【物理學】濾光鏡，濾色器。vt 過濾，用過濾...
  1. Quadrature mirror filter qmf

    正交鏡象濾波器
  2. In addition, according to the characteristics of wavelet packet transform and that of conjugate quadrature filter bank, we bring forward the ameliorated arithmetic of wavelet packet. the amplitude of time - varying harmonics can be measured accurately through the ameliorated arithmetic

    另外我們結合小波包分解和正交鏡像對稱濾波器的特點，提出了小波包的改進演算法，利用該演算法可對時變諧波信號的幅值進行比較精確的分析。
  3. In the next, we discuss the system of the meg - 1 layer i. the paper centers on the two kernel sub - parts : filtering coding and psychoacoustic model, do some research work in sub - band coding ( cbc ) theory and the relate theory such as quadrature mirror filter ( qmf ) and analyse sub - band filter ; also do research work in psychoacoustic theory especially the part related to the mpeg - 1 layer i. in the third chapter, introduce the ti tms320c6000 series dsps and their characteristics, also about the software development flow and the ti dsp / bios operating system of it. the forth chapter is the most important, firstly, according the algorithm flow in protocol, using c language validate the algorithm ; then, transplant and optimize the coding in dsp. in the processing of optimize, acording the assembler program characteristic of ti dsp, the paper put forward the analyse sub - band filter dsp optimization algorithm base on the eight spot idct. the algorithm has been optimize have greatly improved the work efficiency. make use of the technology of the dsp / bios host channels, data io pipe, software interrupt, we implement the musicam algorithm base on dsp / bios

    論文首先對當前語音編碼技術的發展、分類以及mpeg系列音頻標準作了介紹；接著在第二章，給出了layer的musicam （ masking - patternuniversalsubbandintegratedcodingandmultiplexing ）演算法的系統組成，圍繞分析子帶濾波器和心理聲學模型兩個核心模塊，深入研究了子帶編碼工作原理、比特分配及子帶編碼中用到的正交鏡像濾波器和分析子帶濾波器；探討了心理聲學基本原理和mpeg . 1layer所用到的心理聲學模型。第三章對titms320c6000系列dsp作了簡介，介紹了6000系列dsp結構特點、 c6000dsp軟體開發流程和tidsp / bios操作系統。第四章是本文的重點，首先根據協議給出的演算法用標準c語言編程實現並調試通過。
  4. This thesis begins with hfc network theory and docsis, analyses modulation / demodulation process of data communication in hfc. then, several theories are analysed including qam ( quadrature amplitude modulation ), nyquist root square filter, fec ( forward error correction ), map ( bandwidth allocation map ). and digital signal transmission involved the other important international standard ? itu - t j. 83 annex a / b, is discussed

    本文從hfc網路理論和docsis協議入手，分析了hfc數據通信的調制解調過程，對qam調制、奈奎斯特均方根濾波器、前向糾錯（ forwarderrorcorrection ，簡稱fec ） 、 map通信等進行了闡述；還從中探討了電纜數據機需要用到的另一個國際標準ituj . 83annexa / b所設計的mpeg信號的數字傳輸。
  5. Software radio which promises well needs a kind of wideband high speed and resolution adc, but at present it is hard to realize. on the basis of the theory of multirate signal processing, the theory of filters, bandpass sampling theorem and adc principium, perfect reconstruction quadrature mirror filter ( prqmf ) banks adc system is proposed

    基於此背景，本文在融合多速率數字信號處理理論、濾波器理論、帶通采樣定理以及adc原理的基礎上，提出了prqmf濾波器組adc系統，並對該adc系統的原理、結構、特性進行了探討和研究，其主要結論和創新之處如下： 1
  6. On the basis of our lab ' s previous achievements, the author has studied three kinds of digital signal processing methods - the method based on a digital phase locked loop, the method based on quadrature demodulation, and the method based on adaptive funnel filter ( aff ) and sliding goertzel algo rithm ( sga ). the author has also studied the cmf driving principle, various analog driving circuits, driving waves, and digital driving methods

    主要研究了三種科氏流量計的數字信號處理方法：基於數字鎖相環的方法、基於正交解調的方法和基於自適應funnel濾波器和滑動goertzel演算法的方法；以及科氏流量計驅動的原理、各種模擬驅動的波形、電路以及數字驅動的方法等。
  7. Firstly, we introduce the fundament theory of digital quadrature modulation and digital filter, we also introduce the concept and the key technology of software, including smart antenna, ad, sampling, digital down sample theory. it " s very important to understand this theory. subsequently, we introduce two common designs and its supported hardware, and we also present a new design based on swr

    文中首先介紹了數字信號處理技術，包括數字正交解調技術、數字濾波器的基本理論，接著介紹了軟體無線電的基本概念和關鍵技術，包括智能天線的概念、軟體無線電中的ad技術、中頻帶通采樣技術、數字下變頻技術，深入理解這些技術是實現成功方案的基礎。
  8. For getting better filter performance, we design quadrature mirror filter banks using window function method. considering the frequency response of filter change rapidly, we make the filter is perfect reconstruction on the point of center frequency. the error of reconstruction is small by the point

    考慮到濾波器組在過渡帶出現的其幅頻特性變化的情況，選擇在兩個濾波器交疊的中心頻率處，使其滿足濾波器的完全重構條件，其附近頻率處的誤差也降到很小的范圍之內。
  9. The wavelet filters adopted in the progress are the conjugate quadrature filter bank ( cqf ) and the daubechies ( daub ) based filter. analysis and comparison of the results are made when different wavelet filters work

    同時對不同頻段信號的分離採用不同的小波濾波器? ?共軛正交濾波器（ cqf ）與daubechies （ daub ）小波濾波器的濾波效果進行了比較和分析。
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