脈沖性噪聲 的英文怎麼說

中文拼音 [màichōngxìngzàoshēng]
脈沖性噪聲 英文
pulse noise
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 噪 : 動詞1. （蟲或鳥叫） chirp 2. （大聲叫嚷） make noise; make an uproar; clamour
  1. Backed up by the soplat theory based on particle kinematics, the second chapter of this paper presents with analysis and simulation of several single observer passive measurement models, which uses such relative movement parameters as bearings changing rates and centrifugal acceleration information on the basis of bearings measurements. in the third chapter, the observability of location respectively using bearings and its changing rates information and centrifugal acceleration information is analyzed, and its observable condition is got. the fourth chapter puts forward the modified covariance extended kalman filtering ( mvekf ) against the defect of traditional extended kalman filtering ( ekf ), whose performance is simultaneously compared in the chapter with the performance of ususal tracking algorithm such as ekf, mgekf, iekf by computer simulation

    在近年來提出的基於質點運動學原理的單站無源定位理論基礎上，本文第二章提出了幾種在角度測量的基礎上增加角度變化率及相對運動的離心加速度等運動學參數的單站無源測量模型，並對它們進行了分析和模擬；第三章分別對利用角度及其變化率信息定位和利用離心加速度信息定位的可觀測性進行分析並得到了相應的可觀測條件；第四章針對傳統擴展卡爾曼（ ekf ）方法的缺點，提出了一種修正協方差的擴展卡爾曼濾波（ mvefk ）方法，並將其和ekf 、 mgekf 、 iekf等常用的單站無源定位濾波方法進行了性能模擬比較；第五章通過引入雷達機動目標跟蹤方法和模型，提出了利用角度及其變化率對機動輻射源跟蹤的多級噪聲自適應方法和imm方法；第六章主要對角度變化率和離心加速度參數的獲取技術進行了研究，提出了幾種高精度測量脈沖序列多普勒頻率變化率的方法。
  2. The parameters contain impulse noise, memory effect, scan correlated shift, coherent noise, random noise, dropped lines, inoperable detectors, saturated detectors, mtf, system resolution

    輻射性能參數包括脈沖噪聲、記憶效應、掃描相關偏移、一致噪聲、隨機噪聲、丟失行、不可操作探測器、飽和探測器、調制傳遞函數、系統解析度。
  3. The one - dimension effective fpk equation of colored noise serves as our starting point to evaluate the effect of noise color on communication system design. the theory of ber versus input snr per bit is developed and a new procedure to determine the system parameters that influence the minimum ber is proposed. it is shown that the communication system ' s performance is related to the turnable system parameters as well as the noise correlation time

    在指數相關高期色噪聲情況下，本文以一維有效色噪聲fpk方程作為研究的出發點，理論分析了限帶高斯色噪聲通道中脈沖幅值調制數字信號傳輸的誤碼性能，給出了非線性接收器的接收性能曲線，充分體現了噪聲相關時間的影響。
  4. It ' s high - frequence noise absorption, absorption of noise caused by rapid rise of front and self - reset function have widespread application in imput of supply, for absorption of inductive load switching surge voltage and for protection of two - way thyristor switching device, bypass capacitors, micro - machines and the others

    它所具有的吸收高頻噪聲、前沿快脈沖上升噪聲及自復位功能，使其在電源輸入端、吸收電感性負載開關浪涌電壓、保護雙向可控開關器件、旁路電容器、微型電機等方面有著廣泛的用途。
  5. Take integrity of object information into condition, a two - dimension signal processing method which can make a measurement of the target ’ s speed as well as the range is brought forward at the basis of waveform parameter design. and simulation in the background of hf multi - object with noise is taken. a comparison of signal properties, processing and antinoise detection performance is taken between mcpc and another two high range resolution radar signals : single carrier pulse coded signal and step frequency pulse coded signal

    考慮到目標信息提取的相對完整性，以高頻雷達為背景，在對多載波相位編碼脈沖串信號參數設計的基礎上，推導了三種多載頻相位編碼脈沖串信號的距離速度二維處理過程並相應的對多目標噪聲環境進行了模擬;將多載波相位編碼信號與另外兩種距離高分辨信號:單載頻相位編碼信號和相位編碼階梯跳頻信號，在信號特性、處理過程和抗噪聲特性方面進行了對比;本文從理論上為多載波相位編碼信號的波形設計和分析、信號的處理打下基礎。
  6. The paper includes four sections followed here : the first section studies the modeling of signals of pulse doppler radar seeker, and establishes a radar signal simulation model, including radar emitting signal model, receiving signal model, receiving echo signal model, clutter model, noise model, sum channel directional pattern of antenna model, difference channel directional pattern of antenna model, sheltering model, rcs model, glint noise model, etc. the second section studies signal processing of pulse doppler radar seeker, and establishes radar signal processing mathematical model and data processing mathematical model for simulation, including windowing, doppler filtering, envelope demodulation, pdi, cfar, centering, velocity tracking, angle tracking, a - b filtering, etc. the third section studies the modeling of modified proportion guiding, and establishes guiding model, then dynamic simulation results is provided

    論文的主要工作包括四部分：第一部分研究了脈沖多普勒雷達導引頭的信號建模問題，建立了雷達信號模型，主要包括：發射信號模型、接收信號模型、目標回波信號模型、雜波模型、噪聲模型、和差通道天線方向圖模型、遮擋因子模型、接收機噪聲模型、目標雷達截面積統計性模型、目標角閃爍模型等。第二部分研究了脈沖多普勒雷達導引頭的信號處理模式，建立了信號和數據處理模型，主要包括：加窗和多普勒濾波、包絡檢波、檢波后積累、頻域cfar處理、速度定心、速度跟蹤、角跟蹤、 ?濾波等，然後給出了信號處理流程。
  7. First, this paper research and analyze the feature of signal of pulse doppler radar, and the mathematic model of radar is constructed. the several interference methods that narrow - band suppressing interference, range deception interference and velocity deception interference are discussed. and interference ability is evaluated and simulated

    研究和分析脈沖多普勒雷達信號特徵，建立了該種雷達的數學模型，並討論對脈沖多普勒雷達的窄帶噪聲壓制式干擾、距離欺騙干擾、速度欺騙干擾等幾種干擾樣式，並進行干擾性能評估和模擬研究。
  8. By means of the echo auto - searching algorithm, the automatization of signal processing is realized. the filter algorithms are given to eliminate electric and pulse noise, the measuring reliability is improved greatly. furthermore, the accuracy of time difference measure is improved greatly by using the correlation algorithm and the wavelet algorithm

    提出的自動搜索回波演算法，實現了回波數據處理的自動化;給出的改進滾動去極數字濾波演算法和極值濾波演算法，消除了電噪聲和脈沖噪聲，提高了測量的穩定性;提出的插值相關流量測量演算法、小波包絡壓力測量演算法大大提高了測量的精度。
  9. Transmission character of pulse - shaped noise in insulation monitoring for turbo - generators

    汽輪發電機絕緣監測中脈沖型噪聲的傳播特性
  10. Usually, we consider a sampling technique in which each sample is obtained by averaging a diamond portion of the picture, as we know, a large amount of information of a image in nature mainly gathered the small area, at the same time <, . but to finger print gray image, a fine degree of quantization is particularly important for samples taken in regions of a picture across which the gray level changes slowly

    目前國內外圖像濾波常用的方法有線性濾波和非線性濾波。線性濾波有完善的理論基礎，數學處理也簡單，易於fft實現，在濾波技術中佔有及其重要的地位，但對于像素受污染的指紋圖像而言由於脈沖噪聲的重脫尾，處理效果並不太理想。
  11. The impact of outer noise on impulsive synchronization also has been discussed for further practical application, and the result shows that the system is robust

    為了進一步貼近實際應用的需要，文中還討論了外加噪聲對脈沖同步的影響，證明系統具有魯棒性。
  12. The fourth section studies the modeling of broad band blocking jamming and coherent jamming, and analyses the principal of coherent jamming and the factors of influencing the jamming effect is provided. the performance of pulse doppler radar seeker is simulated when certain jamming methods is exerted. a pulse doppler radar seeker simulation system is established, by using the simulation system the performance of pulse doppler radar seeker is evaluated when jammed

    第四部分研究了寬帶阻塞式干擾和相干干擾的建模問題，並分析了相干干擾作用原理，給出了影響干擾效果的主要因素及次要因素，模擬了脈沖多普勒雷達導引頭在寬帶噪聲干擾情況下的截獲和跟蹤性能，模擬了相干干擾對脈沖多普勒雷達導引頭跟蹤性能的干擾效果。
  13. Melp vocoders utilize mixed pulse and noise as the excitation to elimate the buzzes in traditional lpc vocoders, and add a jitter voicing state to overcome the tonal noise. parameters " interpolation, adaptive spectrum enhancement and pulse dispersion also are adopted to improve the continuity. the synthetic speech of melp vocoders sound much more natural and perceivable than the traditional vocoders "

    Melp聲碼器採用混合脈沖和噪聲激勵解決了經典lpc的嗡嗡聲的問題；引入了抖動濁音狀態以克服音調噪聲；利用參數插值、脈沖散布和自適應譜增強等措施提高合成語音的自然度和可懂度；此外還採用了多帶激勵，使其具有了比較強的抗背景噪聲的性能。
  14. The impact on the muffler performance is realized by the high - speed pulsation gas flow, which regenerates noises and strikes the acoustic elements of the muffler such as the pipe run, the body case and the separator plate to arouse the vibration radiated noise

    氣流影響消聲器性能的主要原因是發動機排氣的高速脈動氣流再生噪聲，其次是這種氣流會沖擊消聲器的管路、殼體、隔板等聲學元件，進而激發振動輻射噪聲。
  15. This paper designs a measurement system and measures the main properties of power line practically. the characteristics of power line are analyzed in detail, and a power line channel model is presented which consists of the parametric transfer function model and the simulating model of background noise, narrow noise and impulse noise. simultaneously the simulating method on the computer is presented

    本文設計了一個測量系統對實際電力線通道的主要特性進行了測量，詳細分析了電力線的信號傳輸特性和噪聲特性，給出了一個實用的室內電力線通道模型，包括參數化的傳輸函數模型以及背景噪聲、窄帶噪聲和脈沖噪聲的近似模型，並給出了計算機模擬實現方法。
  16. We made an improvement in overcoming the defects in speech signal adaptive delta modulation ( abbr. adm ), such as slope overloading and grain noise. in this method, numerical sliding average filtering was used for filtering decoding speech signal. experiments and analyses indicate that the method makes waveforms in good agreement between the decoding of adm and the original pulse coding modulation ( abbr. pcm ) signal, and considerably improves, the playback speech quality in naturalness, legibility and under standability

    針對語音信號自適應增量調制（ adm ）方式中斜率過載和顆粒噪聲缺點，提出了一種改進方法，它利用滑動平均方法對解碼后的信號進行數字濾波.試驗和分析表明，該方法使解碼后的信號波形與原脈沖編碼調制（ pcm ）波形具有很好的一致性，使再生語音質量在自然度、清晰度和可懂度方面比改進前均有較大提高
  17. First, an analysis for the design of the impulse phase lock oscillate, which includes impulse phase detector the dielectric resonant oscillate etc. secondly, presents an analysis for the design of wide band balanced low noise amplifier. the last two part simplify the theory and the electrical characteristics of the sub harmonic mixer, and the mmvco

    第一部分著重介紹了脈沖鎖相源的工作原理（主要包括取樣鑒相器和介質穩頻的壓控振蕩器） ，並介紹了研製結果的性能指標;第二部分介紹了平衡式寬帶低噪聲放大器的基本理論
  18. Abstract : a noise model for the analog correlator used in the ultra wideband receivers is proposed due to lack of simulation capability on noise performance of the correlator in current eda tools. the analog correlator circuit is divided into several parts to calculate the equivalent noise sources respectively. the ideal impulse generators, instead of the noise sources, are then applied to obtain the time varying transfer functions. fourier transforms are carried out to explore the relationship between the noise input and output in frequency domain for each part. then the symmetrical noise sources are grouped together and the periodicity of the circuit is utilized to further simplify the model. this model can be used to evaluate noise performance of the correlator

    文摘:給出了分析模擬相關器的噪聲模型.將相關器分成不同的幾個子模塊后，對各模塊分別計算等效噪聲源.然後用理想脈沖源代替噪聲源計算電路的時變傳輸函數，接著用傅里葉變換計算輸入輸出的頻域關系.利用電路的對稱結構合併對稱的子模塊可以進一步簡化模型.該模型可以用來估計相關器的噪聲性能
  19. Because the noises in ir images changes slowly and its frequency components con - centrate on the range of low frequency. the wgos is used to suppressing background and noises. just for the three origin images in this dissertation, the global threshold in the algorithm is enough to divide up targets from the background

    紅外圖像的噪聲通常為脈沖噪聲，具有高頻特性;而紅外圖像的背景變換比較緩慢，其頻譜成分多集中在低頻區域，所以本文在對圖像特性分析的基礎上，設計改進了基於加權廣義次序統計濾波器的背景抑制的演算法。
  20. ( 3 ) the mono - pulse range cell integration detection ( mprid ) method has been improved to adapt to the unrayleigh clutter background, and then the monte - carlo simulation method has been used to analyze the detection performances compared with the dtd

    （ 3 ）改進了噪聲背景下的單脈沖徑向積累恆虛警檢測方法，使之適應于非瑞利雜波背景，並採用蒙特卡羅模擬比較分析了該方法與雙門限檢測方法的性能。
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