移頻信號 的英文怎麼說

中文拼音 [yíbīnxìnháo]
移頻信號 英文
frequency-shift signaling
  • 移 : Ⅰ動詞1. （移動） move; remove; shift 2. （改變; 變動） change; alter Ⅱ名詞（姓氏） a surname
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 號 : 號Ⅰ名1 （名稱） name 2 （別號; 字） assumed name; alternative name3 （商店） business house 4 （...
  1. Compared with traditional mechanical and optic gyros, hrg has such advantages as no high speed circumvolving or moving parts in structure, no warm - up time and short start - up time, wide signal band in frequency, low excursion noises, great endurance in over loading, nuclear radiation and short time power off, small bulk, light weight, low power cost and long life, which is suitable for space applications

    與傳統的機械陀螺和光學陀螺相比，半球諧振陀螺具有如下優勢:結構上無高速轉子、無活動部件;不需預熱，啟動時間短;信號頻帶寬，漂移噪聲低;能承受大的機動過載;抗核輻射，並可經受短時間電源中斷的影響;體積小，重量輕，功耗低，壽命長，非常適合空間應用。
  2. Otherwise, this paper introduces the concept of the principle signal in the same channel transferred bidirectional and the phasic equalizer

    並對這些器件的測試結果進行了討論。講述了同頻信號雙向傳輸原理及相移均衡器的簡單概念。
  3. Further investigated and analyzed composition structure and flow data that dsa ' s formation of image is systematic at first in this paper, carried on intact summing up to the data in the system, having given out the plan of design of high speed and large capacity data channel of digital formation of image system of x - ray ; deeper discussion of control way on sdram, give solution that many pieces of sdram works togetherses of realizing heavy capacity, designing of heavy capacity deposit board realize storing at a high speed to vision data by frame on the basis of this ; through further investigations of interface of pci bus, optimize back end state machine design and urge procedure making with lower, giving intact pci interface scheme that realize high speed dma data transmission and satisfy request of video transmitting ; further investigate the figure systematic design method of programmable logic devices, due to the difficult point of drifting about of enabled signal in fifo in common use and setting up and keeping of output signal, method has been proposed of improving stability of system making use of signal utilizing the phase locking ring in fpga to offer a lot of clocks to move thus realize coordinating the data between every module of system to transmit at a high speed by making use of fifo

    本文首先對數字減影血管造影（ dsa ）成像系統的組成結構和數據流向進行了深入研究和分析，並對系統中的數據流向進行了完整的歸納和總結，給出了x線數字成像系統中的高速大容量數據通道的設計方案；在對sdram的控制方式做了深入探討后，給出了實現大容量多條sdram共同工作的解決方案，在此基礎上設計了大容量幀存板實現對圖象數據進行高速存儲；通過對pci總線介面的深入研究，優化後端狀態機設計和低層驅動程序開發，給出了完整的pci介面方案實現高速dma數據傳輸，完全可以滿足視頻傳輸要求；深入研究了基於大規模可編程器件的數字系統設計方法，針對通用fifo使能信號漂移、輸出數據難于建立和保持等設計難點，提出了利用fpga中的鎖相環提供多個時鐘相移的信號來提高系統穩定性的解決方案，從而實現利用fifo來協調系統各模塊之間的數據高速傳輸。
  4. The detecting accuracy of the beam drift would be improved, as a high performance acoustooptic modulator modulates the frequency of the laser beam drift signal far away from the power frequency, the double power frequency and high frequency noises

    具體包括: 1 .利用聲光調制器將光束漂移量信號調制到遠離工頻及其倍頻干擾和高頻噪聲的頻帶段，以期提高光束漂移量的檢測精度。
  5. 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。
  6. Dvb - t digital tv receiver can receive dvb - t digital tv program, decode in the pc and play mpeg - 2 video and audio signal which complied with high - definition tv or standard - definition tv duly. it can be used for televiewing in the microcomputer and mobile receiving

    基於usb2 . 0的dvb - t數字電視接收系統可以接收dvb - t數字電視節目，實現在個人電腦上解碼並及時播放高清或標清電視畫質的mpeg - 2視頻信號和音頻信號，適合運用微電腦收看電視節目，並且可以移動接收。
  7. In wcdma system which uses direct sequence to spread spectrum, the spread spectrum code ( pn code ) phase of the receiver must be synchronized with that of the received signal precisely to despread and demodulate the signal correctly. multipath channel exists in the mobile communication environment for the radio signal reflection by obstacles between transmitters and receivers. by using the autocorrelation of the spread sprectrum code, rake receiver can process received signals and therefore multipath components can be resolvable

    在wcdma系統中，為正確解擴解調接收到的擴頻信號，接收機本地產生的擴頻碼（ pn碼）相位必須和接收信號中的擴頻碼相位完全同步;同時移動通信環境中的傳輸信號由於接收機和發射機之間的直達路徑有可能被建築物或其他障礙物所阻礙，總是經過折射或反射的多條路徑后才到達接收機，從而產生多徑通道。
  8. The two rails are not only signal lines of track circuits, but also loop current line of locomotive traction current in electrified railway block

    在電氣化鐵路區段，兩條鋼軌既是移頻信號的傳輸線又是機車牽引電流的迴流線。
  9. In testing upper frequency, lower frequency, and modulating frequency, the method of directly testing upper frequency and lower frequency then calculating carrier frequency is adopted

    在測量移頻信號的上、下邊頻及載波頻率時，採用直接測量上、下邊頻，然後由上、下邊頻求中頻載波的方法。
  10. Because frequency - shift signal is a kind of modulation signal, it ' s waveform is two ac sine signal of alternating i. e. upper frequency and lower frequency which was generated by low frequency modulating middle frequency

    由於移頻信號是一種調頻信號，其波形為低頻信號調制中心載頻信號后產生的低端載頻（下邊頻）和高端載頻（上邊頻）兩個交替變化的正弦交流信號。
  11. The content of this theme is as follows : without time, without open, without stopping railway transport, and without interrupting traction current of block tested, meanwhile track circuit parameters in electrical and no electrical blocks is measured of on - line, dynamic and real - time. these parameters include voltage of fsk signal, voltage of industrial and harmonic wave interference, upper frequency, lower frequency, carrier frequency and low frequency 18 messages frequency

    本課題研究內容：在不要點，不開天窗，不中斷行車，不中斷被測區段牽引電流的情況下，在線、動態、實時測量電化區段和非電化區段的移頻信號電壓、工頻干擾電壓，移頻信號（調頻信號）的上邊頻、下邊頻、載波頻率、以及低頻18信息頻率等參數。
  12. On the following, on the basis of formulas given above, three kinds of effects due to ionosphere are presented : image shift due to group delay which was caused by the difference between the group velocity and the velocity of light in the ionosphere ; image distortion due to ionospheric dispersion which can create second phase error of lfm signals ; the last, the phase perturbation caused by the irregularities of the ionosphere can reduce the coherent length and affect azimuthal resolution

    文中主要研究了電離層的三種影響：信號經過電離層傳播的群延遲引起的成像偏移；電離層的色散效應給線性調頻信號帶來二次相位誤差，導致圖像退化、失真；以及電離層的閃爍、湍流等不規則性引起的信號相位起伏。在此基礎上，比較分析了不同波段、帶寬條件下電離層的影響。
  13. 1 in the research of design of radar waveform, one kind of hybrid radar waveform obtained by combining the chirp waveform with the non - periodic pseudorandom sequences is discussed. through the theoretical analysis and computer simulation, several main characteristics of this kinds of hybrid waveforms are discussed, such as the ambiguity function, ambiguity graph, the spectrum, the weighting methods, the response of the processing filter and the low probability of interception. those are showing the effectiveness of the new hybrid waveforms on the performance of high resolution and low probability of interception

    作者在以下幾個方面的研究工作中取得了進展及創新： 1 、在雷達波形設計中，介紹了一類新的線性調頻信號與非周期隨機編碼信號相結合的組合波形的組合形式，通過理論分析和大量的計算機模擬研究了這類組合波形的模糊函數（圖） 、頻譜特性、多普勒頻移特性、加權輸出特性、低截獲等方面的特點，證明了新型的組合波形在高分辨、低截獲等方面的有效性。
  14. This encoding mode was first applied in digital mobile communications to encode voice, effectively lessening the code distortion of audio signals

    該編碼首先應用在數字移動通信中，用作話音的編碼，它能夠有效地削減音頻信號的編碼失真。
  15. Simulator presented in this paper provides a direct interface for the test of shortwave communication system, which well represents various features of hf channel such as multi - path delay, rayleigh fading, doppler shift, doppler spread, gaussian noise and impulsive interference, etc. in order to realize the channel simulation for the intermediate frequency signal, we, inspired by the idea of soft - defined radio, bring forward a new design method that the channel simulator consists of several dsp chips

    本文研製的模擬器提供介面直接對短波通信系統進行測試，能夠全面反映短波通道的多徑時延、瑞利衰落、多普勒頻移、多普勒擴展、高斯噪聲和脈沖干擾等特性。為了實現對中頻信號的通道模擬，開發出一個結合軟體無線電思想的由多個數字信號處理晶元構成的短波通道物理模擬器。
  16. Based the research on the laser beam drift feedback control technique, analysing the beam drift and its frequency components, a laser beam directional stability method is studied in the thesis in detail, with its measurement and control circuit system that combines the laser beam intensity modulation and the beam drift feedback control technique. in this method, at first the laser beam intensity is modulated with the acoustooptic modulator, then the lock - in amplifier is applied to detect and demodulate the modulating signal, at last a feedback control signal is generated by the dsp control circuit at last, including : 1

    本文在原有的激光光束漂移量反饋控制準直技術的基礎上，對光束漂移量信號的數據和頻譜進行了分析，重點研究了一種集聲光調制光強與光束漂移量反饋控制準直技術於一體的激光光束方向穩定方法及其測控電路系統，該方法通過聲光調制實現光強調制，接著通過鎖相放大電路檢測並解調調制信號，然後通過dsp控制電路進一步對光束的漂移量進行反饋控制。
  17. A switch ic for analog signal processing is designed and implemented, which can fulfill the functions of sampling, weighting, controlling and summing of high frequency analog signals. the circuit consists of three parts : four channel analog switches, a voltage reference and the control circuitry. each analog switch is comprised of two high - transconductance n - mosfets with high w / l ratio, which realize the fine tuning and coarse tuning of the input signal respectively

    本文研究並設計了一種可對高頻信號進行取樣、加權、控制、疊加的模擬信號處理丌關集成電路，它包括模擬開關、電壓基準源和移位寄存器三個功能模塊，通過兩個高寬長比的高跨導nmos晶體管實現權值的粗調和微調。
  18. Adopt the ds18b20 ' s figure temperature sensor, take the online measure to the key eq uipment of the system ; as to the video signal in the monitoring system, since the fact that video wire is tiny, and the connector is great, especially to those relative and removable video signal, the video wire is easy to break down, such as short circuit and so on, along with the video device is over a long period of time being in the circular telegram running state, also easily running into trouble, hence, valid means to be take adopt to the video signal

    本故障分析儀採用了ds18b20數字溫度傳感器，對關鍵設備的機溫進行實時在線監測；對于監控系統中的視頻信號，由於其線路長、線徑細、轉接頭較多，尤其是那些可旋轉、移動的視頻信號，易發生視頻線斷線、短路等情況，再加上視頻設備是長期處于通電運行狀態，也易發生故障情況。因此應採用有效的方式對視頻信號進行監控。
  19. To despread and demodulate the signal correctly in the spread spectrum system, the pn code phase of the receiver must be synchronized with that of the input signal precisely. multipath channel exists in the wireless environment for radio signal reflection by obstacles between transmitters and receivers

    在擴頻通信系統中，為正確解擴和解調接收到的擴頻信號，接收機的pn序列相位和接收信號的pn序列相位必須完全同步；同時移動無線環境中的傳輸信號總是被收發信機之間的許多障礙物所反射，從而產生多徑通道。
  20. Nass acts as a specialized " data mover ", pushing and pulling files such as text, images and video clips over a network

    Nass起到了專用「數據移動器」的作用，在網路上送和取諸如文本、圖像和一段段視頻信號。
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