時分信號方式 的英文怎麼說

中文拼音 [shífēnxìnháofāngshì]
時分信號方式 英文
time division signaling
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 號 : 號Ⅰ名1 （名稱） name 2 （別號; 字） assumed name; alternative name3 （商店） business house 4 （...
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 式 : 名詞1 （樣式） type; style 2 （格式） pattern; form 3 （儀式; 典禮） ceremony; ritual 4 （自然科...
  • 時分 : 時分time:黃昏時分 at dusk; at twiligh; cock-shut time
  • 方式 : way; fashion; pattern
  1. By using the processing method of sliding time window, the problem of the periodicity range ambiguity is solved. meanwhile, the problem of range ambiguity which is produced because the range of target is biger than the maximum range of radar is also solved by using this method. then, the pulse width parameter which is the most important in the parameters of fmicw is analyzed. the stricter restrict is given to ensure the range spectrum has only one beat frequency after signal processing. at last this thesis introduces the different signal processing methods of fmpcw and fmicw

    同時利用該方法解決了fmpcw信號的由於目標距離超過雷達的最大單值測距范圍而引起的距離模糊問題。然後對fmicw波形參數中最為重要的脈沖寬度進行了分析，給出了更為嚴格的約束條件，保證了信號處理后距離譜峰值的唯一性。最後，分別介紹了fmpcw和fmicw信號的不同處理方式，並對兩者不同的時域濾波性能進行了比較，並對二者的差異進行了分析。
  2. Based on the analysis of the beat frequency signal, the expression of the beat frequency phase is deduced. the expression indicates physics meanings of quantities to be detected and supplies theoretical bases for detection methods. by using two - dimensional fft, the range and velocity information of target is got out from the echo. according to the periodicity range ambiguity of symmetrical pulses in fmpcw, the processing method of sliding time window is used

    通過對差頻信號進行的分析，得出了差頻相位的具體表達式，表現出了要檢測的各量的物理意義，對檢測的方法提供了理論依據。利用二維fft方法，可以有效地提取回波中目標的距離與速度信息。對于fmpcw信號由於均勻脈沖產生的周期性距離模糊的問題，採取時間波門的處理方法。
  3. Based on mono - pulse radar system and the analysis of terrain echoes, a geometrical model of air to ground ranging is constituted. by using the signals received from the sum and difference channels of terrain follow radar, a group of the expressions for terrain echoes are educed and characteristics of these echoes are obtained. according to the characteristics of the echoes, the theory and method of pass zero detection of difference channel and its applications are discussed in detail

    針對一維單脈沖雷達體制，分析了地形目標回波特性；建立了地形跟隨雷達空地測距的幾何關系；利用雷達收發信號，導出了地形跟隨雷達和差接收通道的回波信號表達式，進行了波形模擬，得到了地形跟隨雷達的地面散射產生回波在時域中的特性；根據和差回波特性，闡述了差信號過零點檢測測距的原理和方法及工程實踐中的應用，並給出了真實雷達對外輻射試驗的結果，驗證了文中的模擬。
  4. Compared to the analogy or the base - band sampling solution, this structure not only enhanced the system mobility, the flexibility and stability, but also reduced the cost, moreover it may be a public platform, which realize multi - purpose and multi - service patterns communication signal despread and demodulation, has fully reflected the thought of software radio

    與採用模擬或基帶采樣解擴解調方式相比，這種結構既增加了系統的機動性、靈活性和穩定性，同時價格大幅下降，而且可以作為一個公用平臺，實現多功能、多制式通信信號解擴解調，充分反映了軟體無線電的思想。
  5. The main research contents of this dissertation are shown in the following : ( 1 ) introduce one method of use the counting pulse to develop ie measuring system and new method of using the high frequency clock signal to divide the space pulse

    本文主要研究內容如下: （ 1 ）系統論述了一個脈沖計數方式的ie測量系統的測量原理，闡述了一個採用高頻的時鐘信號細分空間脈沖的新型細分方法。
  6. First, how to conduct sample and quantification of continuous time signal which is prior condition of sdr is explored in detail, and the comparison and analysis of some sample modes are given in which band pass signal sampling theorem is most important. second, multi - sample rate signal processing which is an important basis of sdr is studied. emphasis are put on decimation and interpolation those are the most fundamental process and the realization of decimation and interpolation filter

    在基於中頻采樣的軟體無線電結構框架下，首先詳細探討了軟體無線電的前提條件，即如何對連續時間信號進行采樣量化，比較分析了幾種采樣的方式，其中最為重要的是帶通信號采樣定理；然後探討了軟體無線電的一個重要基礎，即多采樣率信號處理，重點討論其最基本的兩個過程抽取和內插以及抽取器和內插器的實現；接著介紹了結構簡單、適用於一級抽取的cic濾波器和適用於做2倍抽取的半帶濾波器；再次論文在總結了傳統的調制解調基礎上，結合軟體無線電器件的特點，系統的探討並實現了基於正交思想的am 、 fm 、 ask 、 fsk 、 bpsk 、 qpsk的正交調制解調演算法。
  7. 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。
  8. In the second method, wavelet transform is combined with modal transform, and transient travelling - wave signal is used. after three phase signals are decomposed into their modal components, the wavelet transform coefficient of ground mode can be used to identify approximate position of fault, and the wavelet transform coefficient of aerial mode is used for identifying arrival time of traveling - wave

    第二種方法將小波變換與模式變換理論結合起來，採用的是暫態行波信號，首先將三相信號轉換成模式分量，零模分量的小波變換系數用於判別故障的大致位置，然後利用線模分量的小波變換系數來確定行波到達時間。
  9. Overtaking. besides, this thesis also presents fuzzy - based multi - phase intelligent signal control strategy according to the deficiencies of present traffic signal control system and the research of fuzzy traffic signal control, this signal control strategy focuses on the single junction signal control problem, though imitating the ways of traffic police managing the traffic, it has the ability of intelligent phase changing and controlling in the light of the real traffic flow, the simulation result shows : in two - and multi - phase conditions, the average vehicle delay is reduced by 15 % and by 27 % compared with the general fuzzy control method

    此外，本文還根據目前交通信號控制方法的不足以及現有的運用模糊控制技術進行交通信號控制研究上的欠缺，提出了基於模糊控制的多相位智能擬人信號控制策略，該控制策略以單交叉口的信號控制為研究對象，通過模擬交通指揮者實際進行交通控制的特點，使控制系統能實時根據各相位車輛的多少進行信號的智能控制，模擬結果表明：與普通模糊交通信號控制方法相比，在兩相位與多相位的模式中可分別減小平均停車延誤平均15和27 。
  10. This system uses multicenter synchronization sampling and dma sampling control method, which has high sampling frequency. the system can realize displaying and analyzing in real time

    該系統採用多通道同步採集，采樣頻率高，且採用dma控制方式，實時性強，能夠實現振動、擺度信號實時顯示和分析等功能。
  11. The thesis firstly analyzes the signal form of frequency modulated interrupted continuous waveform ( fmicw ) in theory, studies the principles of detecting range and velocity for fmcw, and further discusses the essential processing methods of the fmicw signal form, including the range transform processing method based on the strict corresponding relation between time and frequency domain, the velocity doppler transform, the digital beam forming

    本文首先從理論上分析了在高頻地波超視距雷達所用的線性調頻斷續波信號的形式，研究了fmcw雷達測距測速原理，並深入地探討了fmicw信號的基本處理方法以及具體的演算法，主要包括距離變換中採用的時間波門相關處理方法，速度多普勒變換，數字波束形成。
  12. On the premise that the basal transducer layout was designed according to the requirements of deep - sea exploring surroundings and technology on the basis of the hardware structure and data collecting ways of interferometric sonar, the echo signal by energy relativity search is analyzed and calculated, altitude data of the tiny terrain on the seabed under real - time irradiation of ultrasonic is gained as to provide parameters of best cutting depth for intellectualization of the seabed mining vehicle timely and promptly

    摘要在相干聲納硬體結構及數據採集方式的基礎上，結合具體的深海鈷結殼探測環境和技術要求，確定了換能器基本布局，探討了信號採集與處理方法，利用能量相關搜索法對回波信號進行分析和計算，得出超聲波實時照射下的海底表面微地形高程數據，為海底采礦車智能化開采提供實時、快速的最佳切削深度參數。
  13. Then we introduce pulse position modulation ( ppm ) using pn code and analysis its multi - access performance, system capacity and power spectrum density. on the basis of those analyses, we study the pulse shape and the anti - jamming ability of the system. at last, multiple access with pseudochaotic time hopping is introduce

    本文首先闡述了uwb脈沖通信系統的基本原理，重點介紹了用偽隨機碼跳時的ppm （脈沖位置調制）調制，分析了他的多址性能、系統容量和功率譜密度，在此基礎上研究了改進性能的發射信號形狀和系統抗干擾能力，最後介紹了偽混沌碼跳時的多址方式。
  14. Its main usage is to measure hardware signals on circuit board, and show to the users through various ways. it gives us very good data analysis interface

    主要用途是用來測試電路板上的硬體數字時序信號，並將採集的數據按照多種方式顯示給用戶，提供良好的數據分析介面。
  15. The outputs of the camera are analog video signals, and the pixel points of the image sensor are difficult to synchronize with the acquisition card. therefore the images have low quality, and the resolution is limited

    由於攝像機的輸出已轉換成模擬視頻信號方式，且攝像頭傳感器的象素點在輸出時序上很難與採集卡的采樣點一一對應，因此視頻圖像數字化后圖像質量損失較大，圖像分辨力受到限制。
  16. When snris below to some extent, the distortion of signal will be so great that the new randomshift invalidates the algorithm, so an improved adaptive centroid estimation algorithmis presented according to signal grouping and the principle of grouping is analyzed. correlation function algorithm is a classical method on shift estimation

    由於當信噪比低到一定程度時，有用信號的損失過大，會導致引入新的隨機時移，使演算法完全失效，因此通過將信號分組的方式提出改進的自適應質心估計演算法，並對分組的原則進行研究。
  17. The assumption that the channel is known is questionable in a rapidly changing mobile environment, or when multiple transmitter antennas are employed. unitary space - time codes and differential unitary space - time codes do n ' t need any channel information. we discuss the unitary space - time codes briefly and study the details of the dustc, including the fundamental differential transmission and receiver equation, and parameters searching algorithm. the parameters searching and simulations results is proposed

    酉空時編碼及酉差分空時編碼（ dustc ）都不需要通道信息，著重研究了酉差分空時編碼技術，簡要說明了酉空時編碼的信號形式及星座設計方法;分析了dustc的發送和接收公式，分析了dustc的嚴格pep和sep的聯合界，給出了當snr值在不同的范圍時， dustc星座參數的選取準則，並進行了rayleigh衰落通道的模擬。
  18. Moreover, the identifying and processing software of image is applied for storingextracting object counting the character of object computing errors and so on. at last, the track precision of object can be got. this system not only applies dalsa camera and pc - dig collecting card to ensuring real time of collecting image, but also applies software compiled by vc + + to improving processing speed and flexibility operating convenience

    該系統不僅採用先進的dalsa航空用數字相機和性能優越的pc - dig圖像採集卡，以及低電壓差分信號（ lvds ）的介面模式，用很低的電壓擺幅來保證在相對較短的距離內（ 10 - 15m ）實現高速（ 400mbps ）數據傳輸，從而保證了圖像採集的實時性，同時用vc + +編寫的軟體使圖像處理速度高，靈活性強，操作方便。
  19. This project takes tdm ( time - division multiplexing ) to transmit three signals ( vedio, audio, data ) in one fiber

    本系統採用時分復用方式將三路信號（視頻、音頻、數據）在一根光纖上進行傳輸。
  20. Hfc applies the sub - carrier fdm technology, with video, data and voice signals simultaneously transmitted on the coaxial cable via the modem

    Hfc採用副載波頻分復用方式，各種圖像、數據和語音信號通過數據機同時在同軸電纜上傳輸。
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