目標反射信號 的英文怎麼說

中文拼音 [mùbiāofǎnshèxìnháo]
目標反射信號 英文
target echo
  • 目 : Ⅰ名詞1 （眼睛） eye 2 （大項中再分的小項） item 3 [生物學] （把同一綱的生物按彼此相似的特徵分為幾...
  • 標 : Ⅰ名詞1 [書面語] （樹梢） treetop; the tip of a tree2 （枝節或表面） symptom; outside appearance; ...
  • 反 : Ⅰ名詞1 （方向相背） reverse side 2 （造反） rebellion 3 （指反革命、反動派） counterrevolutionari...
  • 射 : Ⅰ動詞1 （用推力或彈力送出） shoot; fire 2 （液體受到壓力迅速擠出） discharge in a jet 3 （放出） ...
  • 號 : 號Ⅰ名1 （名稱） name 2 （別號; 字） assumed name; alternative name3 （商店） business house 4 （...
  • 目標 : 1. （對象） target; objective 2. （目的） goal; aim; destination
  1. 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頻系統，可以將c波段的微波信號上變頻到ka波段的毫米波信號。系統的本振輸入基頻由一相位噪聲非常好的低頻率晶振提供，經過512次的倍頻放大至ka波段。本系統作為實驗室中引信的發射源，由於目標反射信號具有時變的多維性，反射信號變得極為復雜，在信號處理時，不僅信號幅值、頻率有決定意義而且相位關系也很有決定意義。
  2. The second part brings forward a new ar - model - based arm detection method based on features of arm and characteristics of velocity and acceleration of the radar echoes. by establishing two - order ar models, this new detection method computes the poles of models representing different targets, thus estimates the acceleration of the targets so as to determine the nature of the targets. furthermore, this method can not only be applied when the arm is being tracked by radar, but also be put into use in radar ’ s seeking and scanning times

    第二部分則是根據反輻射導彈（ arm ）的特點及其雷達回波信號中速度、加速度等特徵，提出了一種新的基於ar模型的arm檢測演算法，該方法通過建立二階ar模型、估計代表不同目標的模型極點，並由此估算目標加速度來判斷目標性質，該方法不僅可以在雷達已跟蹤上arm后採用，而且適用於雷達搜索掃描時使用，模擬結果表明該方法具有解析度高，對雷達脈沖重復頻率（ pulserepetitionfrequency ， prf ）及積累脈沖數要求不高的特點，在低的prf及少的積累脈沖下，利用該方法仍可有效地識別檢測arm 。
  3. At this moment, both the direct signal and the reflected one impinge into the array, and make the amplitude and phase of the echo change, which cannot be separated from the direct one, thus cause server errors of elevation ’ s estimation, even the failure of tracking

    此時直達信號與反射信號同時進入天線，造成回波幅度與相位的變化，並且這種變化不能從直達信號中分離出來，從而造成目標仰角估計的嚴重誤差，甚至引起跟蹤的失效。
  4. The land clutter is useless signals for target detection caused by land terrain. the multipath effect is some kind of interference which is caused by wave reflection on terrain. the diffraction effect is the phenomenon of wave propagation into shadow region

    地雜波是由地面散射引起的對目標探測無用的信號;多路徑是由電磁波在地面反射所引起的干涉;衍射則是電波繞射傳播到遮蔽區的現象。
  5. Psr is a radio detection equipment that provides information on range and bearing of aircraft in the form of a target blip on the radar screen to air traffic controllers by transmitting radar pulses and detecting the reflected signals from the aircraft. no active transponder or avionics on board aircraft has to be relied on

    監察雷達發出雷達脈沖，偵測從飛機反射回來的信號，便可計算飛機的距離及方位，並以目標點在雷達屏向航空交通管制員顯示，而不須依靠航機上的應答機或其他航空器材。
  6. The polarimetric information in the target scattering signal has great potential on target detection, enhancement, filtering and recognition. some novel techniques can be proffered for detecting concealed targets, weakening the influences of adverse em environments, confronting active jamming and recognizing targets. basic theory of radar polarization is studied firstly

    雷達目標散射信號中的極化信息在目標檢測、增強、濾波及識別中有著巨大的應用潛力，為雷達系統在反隱身、削弱惡劣電磁環境的影響、對抗有源干擾和識別目標等方面提供了新的技術途徑。
  7. This paper presents a method that uses many independent backscattering units to replace the whole object, which reflects the geological characteristics of objects on ground to some extent. 2

    在對回波信號的模擬中本文提出了將目標表面分成許多獨立散射單元來代替整個面目標的實現方法，在一定程度上反映了地物目標的幾何特性。
  8. The exo - atmospheric combat enviroment is introduced, including the outer - space ’ s optical signature, the optical and dynamic signature of the potential targets. the research focus is the precessing rv and tumbling decoy ’ s irradiance intensity ’ s periodical changing rule. a double periodical function model is presented to simulate their irradiance functions

    根據空間彈道目標的光學與運動學特性，重點研究了進動旋轉的彈頭和翻滾運動的誘餌的光學強度序列信號的周期性變化規律，並採用雙周期性函數來表示該光學強度信號，以反映彈頭和誘餌在運動特性和表面輻射特徵方面的差異。
  9. So it is very important to study the method and technology by dual frequency laser interferometer without orbit. and it is a significative task to study a kind of instrument to measure automatically without orbit. this paper adopts a measurement project to track the measurement reflector mirror without orbit by theoretical analyzing and simulant experiment

    本文通過理論分析和模擬實驗，確定採用一種外置光路激光跟蹤測量的方法，即：在雙頻激光干涉儀前面，設置一個兩維跟蹤反射鏡，當測量反射鏡移動時，測控系統驅動控制兩維跟蹤反射鏡旋轉，跟蹤測量目標靶鏡的運動，保證測量信號不中斷，從而實現跟蹤測量。
  10. In this paper applications of wavelet packet analysis, higher order cumulant method and some image processing method in the processing of gpr data acquired from subsurface target backscattering are presented, which includes the following contents : methods to denoise and suppress background clutter for target detection ; to improve the time resolution for target position ; target recognition

    本文討論了小波包分析、高階累積量分析及圖象處理方法在沖擊脈沖探地雷達淺層反射信號處理中的若干應用，包括對目標去噪、確定目標時間位置及進行目標識別方法的研究。
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