quadrature theory 中文意思是什麼

quadrature theory 解釋
求積理論
  • 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。
  • theory : n. 1. 理論，學理，原理。2. 學說，論說 （opp. hypothesis）。3. 推測，揣度。4. 〈口語〉見解，意見。
  1. The paper also studies fast arithmetic and programming of discrete time quadrature wt and wpt and takes a deep look into their additional applications in motor testing, including denoising, filtering and so on. starting from basic theory of time - frequency analysis and wavelet analysis of asymptotic signals, this paper investigates several if law extraction methods and presents an especially effective one using wavelet ridge

    論文從時頻分析的基本理論出發，在漸進信號小波分析的基礎上，研究了漸進信號小波變換的漸進估計方法，提出了利用小波脊線來提取信號頻率隨時間連續變化規律（即瞬時頻率）的方法。
  2. Analyze, design and simulate the digital down - convert frequency. first, the analogue if signal is converted to digital if signal in one a / d convertor which used passband sampling theory. the digital if signal is then passed to a pair of digital mixers operating in phase quadrature for mixing the if signal to baseband signal

    首先利用帶通采樣定理對中頻模擬信號進行a / d變換后將其混頻到基帶，然後用平方根升餘弦滾降濾波器同時完成低通濾波和匹配濾波雙重作用，以提高解調器的效率。
  3. These properties play an important role in theory of gauss - type quadrature rules briefly discussed in section 1. 4

    所以， gauss型求積公式重又成為數值求積中的新貴。
  4. 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。
  5. 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。
  6. In chapter 2, first give the theory of phased array radar. second introduce the analog t / r module and digital t / r module. third discusses some key technology of wide band digital t / r module, including ddws technology and quadrature modulate technology. at last present a scheme of l bandwide banddigital t / r module

    第二章首先介紹了相控陣雷達系統的組成和工作過程，其次介紹了模擬t / r組件和數字t / r組件的組成，然後介紹了寬帶數字t / r組件的關鍵技術，包括:直接數字波形產生技術和正交調制技術，最後提出了一種l波段寬帶數字t / r組件的框圖。
  7. On the basis of quadrature theory and dynamic characteristics, the amplitude detection and control theory for hrg ( hemispherical resonator gyro ) is studied in this paper

    摘要基於正交理論和半球諧振陀螺的動力學分析，研究了半球諧振陀螺的振幅檢測和控制原理。
  8. It is presented that the theory and the manufacturing technology of such analog phase shifter, which are made from conventional 3db quadrature hybrids coupler with two identical varactor - diode networks to provide a shifted phase that varies continuously with biased dc voltage. several analog phase shifters have been made for different operating frequencies. each phase shifter has phase range more than 180, return loss better than - 20db, insertion loss 4. 8db including 3db attenuator, transmission difference less than0. 075 db. computer code phases. bas can present the referenced component values

    介紹了利用鐵氧體磁環製作窄帶3db耦合器的原理和方法，詳細分析了利用此耦合器設計製作模擬壓控移相器的理論和製作技巧，以及所製作的多種頻率的壓控移相器的測試技術指標和實際運行情況。
  9. 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
  10. Finally, we use resonance fluorescence theory to study the quadrature squeezing spectra in the resonance fluorescence of a v - type three - level atom driven by a coherent field and coupled to a single - mode cavity. the influence on the squeezing spectrum caused by cavity - induced quantum interference is discussed

    本文還應用共振熒光理論，研究了一個置於腔中的v型三能級原子的共振熒光的壓縮譜，探討了腔誘導量子干涉對原子共振熒光相振幅的壓縮譜的影響。
  11. The main contents of this paper include : the theory of if digitization ( sampling, quantization, quadrature demodulation and multi - rate digital signal processing ), the simulation of the system project, the design and implementation of the ddc part and introduction of the main devices applied in it

    本文的主要內容包括：中頻數字化理論（采樣，量化，正交解調，多相濾波結構以及fir濾波器的設計等） 、系統方案論證及模擬、數字下變頻部分的硬體實現、系統調試及結果分析以及系統採用的主要器件介紹等。
  12. 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。
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