正交字 的英文怎麼說

中文拼音 [zhēngjiāozì]
正交字 英文
orthotropic word
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 交 : Ⅰ動詞1 （把事物轉移給有關方面） hand over; give up; deliver 2 （到某一時辰或季節） reach （a cert...
  • 字 : Ⅰ名詞1 （文字） character; word 2 （字音） pronunciation 3 （字體） form of a written or printed ...
  1. The experts in engineering, especially in engineering expect that the compact support wavelets are real, orthogonal and symmetric. in fact, no such a wavelet, except the wavelet haar, is found

    工程界使用的小波一般而言是實值的緊支正交對稱或反對稱的，這有很多好處，尤其在數字圖像的邊界處理中。
  2. In this thesis, firstly, we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ), and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage

    我們對兩種正交調制方式（ 16qam和4 - qpsk ）進行了模擬工作並給出了模擬結果，同時討論了碼元同步定時誤差對鎖相環路工作的影響並根據流星通信中使用變速率傳輸時鎖相環路的載波同步性能進行了測試；然後在基於軟體無線電思想的數字處理平臺（該數字處理平臺實現了中頻數字化）上用dsp軟體完成了載波的相位跟蹤。
  3. Bandpass sampling theorem and digital quadrature coherent detection

    帶通采樣定理與中頻採集數字正交檢波
  4. The if digital receiver based on software radio technology adopts the structure of fpga plus dsp, which is more powerful than other systems in signal processing, and is able to complete iq demodulation accurately and acquire characteristic of the signal. the following four aspects is included :

    該中頻數字接收機以軟體無線電思想為核心，採用dsp + fpga的硬體結構，在信號處理能力方面比以往的系統有了很大的提高，能夠精確的完成信號正交解調和抽取濾波和特徵信息的提取。
  5. The software includes a monitor program, an initialization module, a watchdog module, a data fusion module, a can transmission module, a quadrature encoder pulse count module and an a / d interrupt service program

    該系統軟體包括監控程序、初始化模塊、看門狗模塊、數據融合模塊、 can通信模塊、數字量採集模塊、正交編碼脈沖計數模塊和a d中斷服務程序。
  6. However, the paralleling communication can meet the requirements of high speed and fidelity in underwater signal transmissions. ofdm is a kind of novel paralleling transmission technology. the principle of ofdm is that the whole bandwidth can be divided into some subchannels, the high - speed serial signal stream is modulated by some orthogonal subcarriers

    正交頻分復用（ ofdm ）是近年來數字通信中流行的一種并行傳輸新技術，其核心思想是將整個可用頻帶分割成多個正交子通道，將待傳輸的高速串列碼流并行的調制在這些子通道載波上。
  7. And pays emphasis on analyzing the system structure and system flow, the core techniques, the channel characteristic and parameters of dvb - t system. the system adopts some core techniques such as cofdm, a lot of tps ( transmission parameter signalling ) insert and guard interval, and so on. so it can withstand high - level ( up to odb ), long delay static and dynamic multipath distortion

    論文首先描述了數字電視地面廣播的需求條件，技術難點和目前存在的問題，並重點分析了dvb - t系統結構流程，核心技術及系統通道特性和參數，該系統採用了cofdm （編碼正交頻分多路復用） ，大量導頻信號插入和保護間隔技術等核心技術，使之能抵抗高電平（ 0db ） ，長延時的靜態和動態多徑失真，有利於數字和模擬電視的混合傳輸，它的多載波調制模式功能和性能在移動和便攜接收、同頻網等方面具有獨特的優勢。
  8. This thesis discusses the pulse doppler ( pd ) weather radar signal processing system including digital intermediate frequency ( if ) receiver, especially on the application of if sampling and digital demodulation technique in pd weather radar signal processing system, the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation, ground clutters elimination algorithms and a typical engineering realization scheme of pd weather radar signal processing system

    本論文研究的是採用數字中頻接收技術的脈沖多普勒氣象雷達信號處理系統，重點研究了中頻采樣及數字解調技術在脈沖多普勒氣象雷達信號處理系統中的應用、正交雙通道幅相不平衡對氣象回波譜估計的影響、地雜波濾波演算法，以及脈沖多普勒氣象雷達信號處理系統的具體工程實現。
  9. Finally, basing on the if sr receiver subsystem hardware platform, by ad6620 programming on the line and tms320c6713 loading the digital signal quadrant demodulation program, the thesis having realized the demodulation of the am signal, which validates the key thinking of software radio

    .最後，本文基於中頻軟體無線電接收機子系統硬體平臺，通過ad662o的在線可編程、 tms32oc6713加載數字信號正交解調程序，實現了對中頻am信號的解調，驗證了軟體無線電關鍵思想。
  10. The theory basis for medium frequency receive includes sample theory, the signal ' s orthodoxy transform theory, multi - rate digital signal processing theory and signal ' s modulation and demodulation theory

    中頻數字接收的理論基礎是信號的奈奎斯特采樣定理或帶通采樣定理，信號的正交變換原理，多采樣率數字信號處理原理以及信號的調制解調理論。
  11. This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits

    本文採用了一種基於fpga的通用數字調制解調方案，該方案在調制端採用了正交平衡調制技術，在解調端採用了中頻帶通采樣、數字匹配濾波、延時差分解調等技術，直接在中頻上進行數字信號處理，不需要進行下變頻，也不需要增加額外的偽隨機碼同步捕獲和載波提取電路。
  12. The theoretic analysis and computer simulation results reveal that this influence ca n ' t be ignored. because the if sampling and digital demodulation technique can improve amplitude and phase unbalances of in - phase and quadrature channels, we apply it in the pd weather radar signal processing system and select several digital demodulation algorithms, which are easier to implement, for this system

    由於採用中頻采樣和數字解調技術能有效地提高正交解調兩路的幅相一致性，本文將中頻采樣及數字解調技術應用到脈沖多普勒氣象雷達信號處理系統中，並結合氣象信號的特點選擇了適合工程實現的中頻采樣及數字解調演算法。
  13. The software adopts eofs to describe the sound speed profile in the sea, and takes its bottom depth parameters from inputed digital chart. the software can process more complex 3 - dimension sound field

    軟體中採用經驗正交函數來描述海洋中的聲速剖面，海底深度參數以數字海圖的形式輸入，可以處理較復雜的三維情況下的海洋環境聲場。
  14. On the basis of investgation on the related literature of electronic speed governor at home and abroad, this proper control parameters are obtained through the experimental research of the pid digital control parameters with the orthogonality method and through the analysis of the speed change of gasoline engine rev. the electronic speed governor designed hereby performs its controlling fuction through programs, the stable rev and static timing rate of which are also set and controlled by software, has, therefore large universality and function flexibility. so for different types of gasoline engines, the obtainment of relevant parameters and the designing of relevant programs suffice to realize the control functions of the electronic speed governor

    本文在分析研究國內外有關電子調速器的基礎分析方法及其研究狀況的基礎上，採用pid數字控制，並用正交試驗方法對pid數字控制的控制參數進行試驗研究，得到了合適的控制參數。所設計的電子調速器是靠控制軟體來實現調節和控制功能，穩定轉速、穩定調速率等都可以進行程序設定控制，具有很強的通用性和功能擴展能力。對不同型號的汽油機，只要經試驗取得合適的控制參數，編制出相應的控製程序，就可以使用此電子調速器進行轉速控制。
  15. Chapter 3 introduce the circuit design of wide band digital t / r module transmission channel. chapter 4 introduce the fpga software design of wide band digital t / r module transmission channel

    第三章介紹了寬帶數字t / r組件發射通道試驗電路的硬體設計，包括光纖介面電路、 ddws電路、正交調制電路的設計。
  16. In this paper, we propose an adaptive wavelet transform which possess the properties of translation and scale invariance. firstly, the original signal is adaptively renormalized using a scale function of an orthonomal wavelet and the first two moments of the signal. then, we decompose the renomalized signal according to the conventional discrete wavelet transform. as we prove, this adaptive wavelet transform is translation - and scale - invariant, and an efficient algorithm for calculating these wavelet coefficients, called adaptive wavelet invariant moments, is proposed. finally, we give experiment results for 2 - dimension digital signals ( images ) to verify our conclusion

    本文提出了一種具有平移和尺度不變性的自適應小波分解新方法，該方法利用信號的一階、二階矩及正交小波尺度函數，先對信號進行自適應小波「重整」 .然後再對重整后的信號進行普通小波變換.本文證明這種自適應小波變換是平移和尺度不變的，並給出了計算自適應小波變換系數（稱為小波不變矩）的一種有效演算法.對二維數字信號（圖像）的實驗證實了我們的結論
  17. The related issues to zero medium frequency including digital match filter and orthogonal sampling are studied. the research makes a basis for the development and realization of cdma hardware system

    對採用的零中頻技術、數字匹配濾波器、正交采樣所涉及的問題進行研究，為硬體系統的研製打下理論基礎。
  18. On the basis of the third kind structure ( the modulator in simulative field ), the paper gave out a method to realize the software radio digital hardware modulator which can perform the function of ask, psk, dpsk, mask, qpsk, dqpsk, qam, oqpsk modulations, using the apparatus of dsp and cpld. the test showed that the modulator can meet the request of system design

    並以第三種結構的數學模型（模擬域的正交調制模型）為基礎，以dsp和cpld器件為核心，進行了硬體電路設計，實現了基於軟擴頻系統的軟體無線電數字硬體調制平臺，實現了多種數字調制方式，其中包括ask ， psk ， dpsk ， mask ， qpsk ， dqpsk ， qam ， oqpsk調制方式。
  19. As a high band - efficiency digital modulation scheme, dvbc ( digital video broadcasting of cable ) qam ( quadrature amplitude modulation ) modulator is widely adopted in the wide - band communication area, such as hdtv broadcasting, cable modem, microwave communication, satellite communication and so on

    正交幅度調制器（ qammodulator ）作為一種高頻譜利用率的數字調制方式，在高清晰度電視（ hdtv ）廣播、 cablemodem 、固定寬帶無線接入、衛星通信、數字微波傳輸等寬帶通信領域得到了廣泛應用。
  20. 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。
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