標頻時信號 的英文怎麼說

中文拼音 [biāobīnshíxìnháo]
標頻時信號 英文
standard frequency and time signals
  • : Ⅰ名詞1 [書面語] (樹梢) treetop; the tip of a tree2 (枝節或表面) symptom; outside appearance; ...
  • : 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...
  • : 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...
  • : 號Ⅰ名1 (名稱) name 2 (別號; 字) assumed name; alternative name3 (商店) business house 4 (...
  1. 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

    通過對差進行的分析,得出了差相位的具體表達式,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的距離與速度息。對于fmpcw由於均勻脈沖產生的周期性距離模糊的問題,採取間波門的處理方法。
  2. Contrapose to the instability of the third - order charge - pump pll system, the loop optimization method is employed in system level design to decide the bandwidth and phase margin, therefore the loop bandwidth locates at the maximum phase margin to guarantee the stability of the system. according to tsmc 0. 35 m sige bicmos model, the sub - circuits in the designed pll and the whole system are simulated and verified by the cadence spectre

    5 .根據tsmc0 . 35 msigebicmos工藝模型,利用cadencespectre模擬軟體對所設計的電荷泵鎖相環路中各個模塊及整個系統進行了模擬模擬,模擬結果顯示,在1 . 5v電源電壓下,率為200mhz的參考輸入,輸出中心率為800mhz ,分電路採用4分,環路帶寬為10mhz ,捕獲間大約為0 . 92 s ,功耗大約為15mw ,達到了設計指
  3. The other research purpose is to discover characteristic information and reliable methods of reflecting spinal cord damage. due to typical damage indicators, amplitude and latent period, have bugs such as limited information and weak stabilities, this project recommends applying time - frequency analysis to monitoring spinal cord function. through analysing and comparing typical signal with stft and cwt, it is proved indicators under time - frequency distribution can be better in reflecting signal changes, espcially the wavelet transformation

    針對目前ep監測中判定脊髓損傷的指(波幅和潛伏期)存在息量相對較小、穩定性較差的缺陷,本課題提出利用分析技術對術中脊髓功能監護進行研究,通過短傅立葉變換和小波變換分析和比較典型分佈,證明特徵參數能更有效的提取的變化息。
  4. The specific research methods are listed : 1. matched filter taking the max ouput snr as the best rule correlates nonstop divided signal and divided echo to detect low snr target signal. then all one dimension divided correlation outs and done fft in portrait to leach interferential signal such as static or low rate mussy meaves, many pathway echo and so on and to take target ' s time difference and doppler frequency that combine parameters that target ' s direction taken from antenna and so on to implement target ' s orientation and tracking

    具體研究方法如下: 1 、採用以輸出噪比最大為準則的最佳匹配濾波器來對分段的參考和目作相關處理來檢測低噪比目,然後對一維分段相關輸出組作縱向傅立葉變換來濾除靜態或低速的雜波、多徑回波等干擾,並提取目差和多普勒率,再結合由天線獲得的目方向等參數,就可以實現目的定位和跟蹤。
  5. In recent years, the worldwide researchers pay much attention to fourier telescopy. it is an active imaging technique that encodes the information in the temporal instead of spatial domain, then receives the speckle and deposed of it to reconstruction the object image. now, the high - resolution technique is under the condition of deeply researched

    它是一種主動式干涉成像技術,這一技術通過域內的相位的調制完成直線條紋對目的掃描,從而達到對深空目譜的抽樣,然後接收其散射回波,對回波進行處理,進而還原出目的像。
  6. Standard frequency and time signal - satellite service

    衛星業務
  7. In the fourth chapter, firstly, the fsk / psk signal function is presented, then, the signal which frequency and phase are modulated by costas code and barker code for each are analyzed at the same time. after that, the target returns and clutter returns are analyzed and modeled. at last, both of the time correlation characteristics and space correlation characteristics are theoretically analyzed

    在第四章中,首先給出fsk / psk的表達式,並對一種分別採用costas碼和barker碼進行率和相位調制的fsk / psk進行分析,然後對fsk / psk的目回波和雜亂回波進行分析與建模,接著,對雜波間相關性和空間相關性進行理論分析,由分析結果可知, fsk / psk雷達雜波的間相關性不變、空間相關性增強。
  8. To increase the bearing accuracy of amplitude - comparison, the multi - channel system was chosen, the angle of reaching of moving antenna pattern serial was estimated from the frequency domain using the phase - delay estimating method, and at the same time, the selection of antenna, quantization of signal and touch switches were optimized in concrete engineering practice, and so the requirement of the index was satisfied

    為提高比幅測向的精度,選用多通道體制,採取相位延估計法從域來估算移動天線方向圖系列的達到角,同在具體的工程實現上對天線選取、的量化、去摸開關等進行優化,從而滿足指要求。
  9. At first some modification is made in conventional beam forming of frequency domain, namely to estimate doa by arrays outputs on compensated spacial frequency points of echoes. then the cwt is utilized to signal processing in space - frequency domain for estimation of doa, and the corresponding modification is also made. in the dissertation, the computer simulations of doa estimation for both narrow - band and wide - band echoes are given, so do the necessary comparison among several methods and crb

    首先在傳統的域波束形成演算法的基礎上,提出對寬帶率補償,也即對寬帶回波的各空間率根據率的差異進行相應補償,然後對各陣元輸出求和來得到方位估計;其次將連續小波變換引入到空間?率處理中,從而完成對目方位的估計,並進行了相應地補償。
  10. The major job is manufactured a transmitter, which has three upmixer channels. its function is to up convert the signals from c - band to ka - band. the input local oscillator is provided by a low frequency crystal oscillator which has a good performance of phase noise, through 512 times multiply to ka band. this sysetem is used in the laboratory as transmitter source of the fuze, for the multidimensional objects in practise, which lead to the complexity of the reflect signal, so the amplitude, frequency and the phase of the transmit signals both have a key role in dealing with the reflection signals. therefore, this system requires for both the coherence of the single channel ’ s amplitude, phase and multi channels

    本文的主要工作是應用戶要求製作一具有三發射通道的上變系統,可以將c波段的微波上變到ka波段的毫米波。系統的本振輸入基由一相位噪聲非常好的低率晶振提供,經過512次的倍放大至ka波段。本系統作為實驗室中引的發射源,由於目反射具有變的多維性,反射變得極為復雜,在處理,不僅幅值、率有決定意義而且相位關系也很有決定意義。
  11. The fruits of emulational research are obtained : 1 the method of divided planar correlation deal with wonderfully and can detect the target information of tv sound fm signal about time difference and doppler frequency with this understanding of - 20db snr

    模擬研究成果: 1 、分段二維相關處理方法效果不錯,能在- 20db噪比情況下,可靠地檢測到電視伴音調差與多普勒息。
  12. Time and frequency dissemination via television signals

    利用電視傳送
  13. The primary aim of the single chip microcomputer circuit of this project is data collecting, it applied the invention monopoly of professor zhang guanghui and professor peng donglin of chongqing university, make use of the high frequency inserted pulse, and join together the software to constitute subsidiary calibration distributed on equal time, complete the task of on - line subdivision in the dynamic measure process, finally up pass the data to pc, pc handle it and get examination result

    下位機是硬體集成電路,利用重慶大學張光輝教授、彭東林教授的發明專利「計算機對脈沖的細分與辨向新方法」 ,附加率極高的外部插入脈沖,結合軟體構成按間均勻分度的輔助尺,實現動態測量過程中采樣點的實細分,最終完成數據採集任務;上位機主要是軟體部分,利用pc機接收下位機的採集數據並進行分析處理,得出檢測結果。
  14. The concept of " timing " in the article is not the clock in our ordinary living, but syntheses which is made up of some frequency source in the signal generator ( such as cs atom frequency standard, rb clock & high accuracy quartz crystal oscillator ) which produces the primary frequency, the matching input interface and the matching output interface and controlling circuit etc. for example, bits is a kind of timing equipment, which is used to control the timing of some functions

    本文論及的「鐘」概念不是指日常生活中使用的鐘表,而是由產生基準率的發生器(如銫原子準、銣鐘及高精度石英晶體振蕩器等)中的某種率源以及相配套的輸入、輸出介面和控制電路等組成的一整套具有特定同步定功能的綜合體。如bits就是一種鐘設備,它提供用在通系統中控制某些功能的定間基準設備,鐘提供的稱為基準、定或同步
  15. The dh - pci - h black and white grabber finishes the process of transmitting the data, which controlled by the grabber. without cpu, its speeds of which be transmitted be at 40mb / s, and be able to connected with the more parts of the standard or un - standard signals of videos, so it is finished at the data is transmitted in real - time

    採用dh - pci - h黑白圖像採集卡,數據的傳送過程是由圖像卡控制的,無需cpu參與,圖像傳輸速度可達40mb s ,能夠與絕大部分的準與非準視相連接,實現了數據的實傳輸。
  16. The main content and creative work in this dissertation include : 1. simulate the echoes of the radar, namely produce the lfm signals with band width equaling 5mhz, time width in 9 s ~ 42 s and analyze them in frequency domain pulse compression. at the same time suppress the clutter and indicate targets

    本文完成的主要工作和創新之處有: 1 .通過模擬模擬回波,產生了帶寬為5mhz ,寬在9 s ~ 42 s范圍內帶目和噪聲雜波的lfm,並對其進行了域脈沖壓縮的分析,抑制雜波並顯示出目
  17. Analyzed the signal of 3 - d spatio - temporal sampling in spatio - temporal domain and frequency domain, according as the base principle of sampling, adopted more - dots - marked method, gained random spatio - temporal sampling matrix of digital video signal, it proved that arithmetic is accurate and efficiency

    空域和域上分析三維采樣的數字視,以采樣矩陣方法為依據,採用多點定方法,得到任意數字視流的空采樣矩陣。計算機模擬實驗證明了該方法的正確性和可行性。
  18. This paper studies mainly on the cross - components in the underwater target echoes signal processing

    本文以分析中的交叉項為主線,系統的研究了交叉項在水下目回波處理中的應用。
  19. The four - parameter basis functions decomposition of time - frequency signal representation is presented based on the characteristics of doppler frequency of the radar echoes, thereby dopplerlet transform is introduced

    根據接收到的雷達目回波的多普勒率特性,提出用4參數基函數的表示法,從而引出多普勒小波變換的概念。
  20. Underwater target echoes are typically nonstationary signals and time - frequency analysis is effective to deal with nonstationary signals

    水下目回波是典型的非平穩分析是分析非平穩的有效工具。
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