正載波 的英文怎麼說

中文拼音 [zhēngzǎibō]
正載波 英文
positive carrier
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 載 : 載Ⅰ名詞（年） year : 一年半載 six to twelve months; six months to a year; 三年五載 three to five ...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 載波 : signal carrier; carrier wave; carrier: 3路載波 three channel carrier載波傳輸 carrier transmission...
  1. 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。
  2. Moreover, it does not necessarily need waveforms other than sinusoids, for both modulator and carrier, in order to produce interesting musical sounds

    而且，它不一定需要調制器和載波波形（除了正弦波）來創作有趣的樂聲
  3. Firstly, the principle of gps kinematical carrier phase measurement positioning is introduced concisely. the mathematical mode of gps carrier phase measurement absolution positioning is discussed and provided. a way to obtain the difference between the true location and the estimated location is proposed

    論文首先介紹了gps動態載波相位測量定位原理，討論了動態載波相位測量絕對定位的數學模型，給出了一種求解接收機所在位置改正數的方法。
  4. This signal is used to indicate whether a modem is connected to a working phone line and a data carrier signal is detected

    此信號用於指示是否數據機已連接到正常工作的電話線並檢測到數據載波信號。
  5. Colour carrier modifier

    彩色載波修正器
  6. In this paper, after introduction of the code division multiple access ( cdma ) and orthogonal multicarrier ( mc ) technique, the system model of mc - cdma is analyzed and the bit error rate ( ber ) performance in downlink and uplink channel is shown in awgn channel by computer simulation

    本文在碼分多址技術和正交多載波技術原理基礎上，分析了高斯白噪聲通道中多載波碼分多址（ mc - cdma ）系統的數學模型，並且使用不同的擴展碼對下行通道和上行通道誤碼率性能分別作了計算機模擬分析。
  7. In the process of gps triple frequency observables, the rms of the integer ambiguity isn ' t fit for detecting and correcting cycle slips for the pseudo - range noise

    摘要在gps三頻非差觀測數據的處理中，由於偽距噪聲的影響，利用原始的偽距和載波相位觀測數據估計的模糊度誤差比較大，不能用於探測和改正周跳。
  8. Shapes of pulse envelope are found to have some effect on the degree of phase influences. dependence of single - cycle pulse ( scp ) energy on the carrier phase has been studied for gaussian, lorentzian, hyperbolic secant and sine shapes respectively, which shows that these energies can be expressed in the same form. phase effect on pulse with gaussian envelope is the first to show, then are hyperbolic secant and lorentzian pulses, and sine the last

    包絡對載波相位的作用范圍也是有一定影響的，我們對高斯、洛侖茲、雙曲正割和sinc四種不同包絡的脈沖，研究了單周期脈沖能量隨載波相位的變化規律，發現以上四種脈沖的歸一化能量均可在形式上用同一表達式表示，並發現對于這四種不同包絡的脈沖，高斯脈沖相位的作用最早體現出來，然後是雙曲正割和洛侖茲脈沖， sinc脈沖最遲。
  9. There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not

    首先引入開關函數概念，建立了正弦脈寬調制（ spwm ）逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c （ f _ c為逆變器載波頻率）來判定系統是否出現低頻振蕩；最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。
  10. Orthogonal frequency division multiplexing ( ofdm ) is a special case of multicarrier transmission, in which a single high data rate datastream is transmitted using a number of lower data rate subcarriers

    Ofdm （正交頻分多路復用）是一種特殊的多載波傳輸方式，由於它使用一系列低速子載波并行傳輸數據，使得傳輸速率得到大幅度提高。
  11. Orthogonal frequency division multiplexing ( ofdm ) is a special case of multicarrier transmission, in which a single high rate datastream is transmitted using a number of lower data rate subcarriers

    Ofdm （ orthogonalfrequencydivisionmultiplexing正交頻分多路復用）是一種特殊的多載波傳輸方式，由於它使用一系列低速子載波并行傳輸數據，使得傳輸速率得到大幅度提高。
  12. 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。
  13. Abstract : the constitution of radio - frequency carrier channel is described, the effects of the components on the radio - frequency signals are analyzed and corresponding solutions are proposed

    文摘:講述了組成高頻載波通道各個環節的結構及作用，分析了它們對高頻信號的影響，提出在非正常工作情況下的解決辦法。
  14. Iterative inter - carrier interference cancellation in ofdm systems

    正交頻分復用子載波間干擾抵消的迭代演算法
  15. 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。
  16. The standard sine waveform is generated by looking up the sine table, and the triangular carrier waveform is produced by a reversible counter

    Spwm信號的產生採用正弦波與三角載波比較的方法，標準正弦波採用查表法實現，三角載波用可逆計數器實現。
  17. In angle measuring, an antenna configuration and interferometer ambiguity - resolving algorithm are proposed, and to eliminate the error caused by carrier phase error, a correction method is introduced, through which all ambiguity - resolving error can be recognized and he corrected even when the error probability is up to 0. 42

    在測角中，提出了一種干涉儀天線陣結構和干涉儀解模糊演算法，針對通道載波相位誤差可能引起的解模糊錯誤，又提出了一種糾正方法，模擬顯示，在發生解模糊錯誤的概率高達0 . 42的情況下，該方法仍然可以識別並糾正所有解模糊錯誤。
  18. The system can generate three - phase spwm pulses and has following characters : the range of modulation frequency is from 0 khz to 4 khz. and can be divided to 7 classes to control. the carrier frequency may be selected up to 24 khz, and can be divided to 8 classes to control ; rotational frequency is defined to 16 bits

    該系統能產生三相六路正弦脈寬調制（ spwm ）波形;調制頻率范圍為0 4khz ，分7級控制; 16位的速度控制解析度;載波頻率分8級控制，最高可達24khz ;系統介面兼容intel系列和motorola系列單片機;該系統控制簡單、精確，易修改，可現場編程;同時具有脈沖延時小、最小脈沖刪除、過壓和過流保護功能等特點，可應用於pwm變頻調速系統的全數字化控制。
  19. These topologies of inverters are composed of two bi - boost dc / dc converters, they are symmetry. so whole circuit turn into four - quadrant converters, we can control every power mosfet on or off. then we can get sine wave with direct current polarization at the left, at the same we also can get sine wave with direct current polarization phase contrast 180 compared of the left at the right

    這類逆變器由左右二個雙向boostdc / dc變換器構成，左右二邊是對稱的，所以整個電路構成了一個四象限變換器，我們可以恰當控制各功率管的開、關，使左邊的兩象限dc / dc變換器輸出一個帶直流偏置的正弦波，使右邊的兩象限dc / dc變換器輸出一個相差180度帶同樣直流偏置的正弦波形，這樣，負載zl上的電壓是左、右兩個dc / dc變換器電壓的差動輸出，正好可以消掉直流偏置，最終在負載r1上得到的就是正弦波。
  20. Furthermore, it is insure that the carrier pahse measurement data does not have cycle slips in gps based attitude determination system, using phase rate prediction algorithm and baseline length constraint information algorithm, the cycle slips can be detected and corrected successfully, which markedly reduce the initialization numbers of attitude determination system

    此外，在gps姿態測量系統中，必須保證載波相位觀測數據中無載波相位周跳，本文提出的多普勒預測演算法和基線長度約束相結合的方法能有效的檢測和修正載波相位整周模糊值固定前和固定后的周跳問題，減少了姿態測量系統重新初始化的次數。
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