radar band 中文意思是什麼

radar band 解釋
雷達波帶
  • radar : n 〈美國〉【無線電】 〈radio detecting and ranging 之略〉 雷達,無線電探測器 (=〈英國〉 radiolo...
  • band : n 1 帶,繩;帶形物;箍;箍條;嵌條;鑲邊;鋸條; 〈pl 〉 (法官等的)寬領帶。2 束縛,羈絆;義務;...
  1. On data level, it is firstly explored fusing signature data from sparse - band collocated radars to obtain wider band target frequency response. the most difficult problem which restricts the fusion process is the lack of mutual coherence between the various radar subbands

    在數據層,首先探索了對多個配置在同一地方的不同頻帶雷達測得的目標頻率響應進行融合,以獲取更寬頻帶目標頻率響應的方法。
  2. With the continuous developments of modern radar technology and anti - electronic technology, the electromagnetic environment hade become more complicated, the transmitted signal ' s carrier frequency had become higher, frequency band occupation had become wider, the form of the signal had become more concealment

    數字信號處理相對于模擬信號處理的優越性主要表現在精度高、靈活性強、可靠性好、易於大規模集成及存儲等,所以正受到工程界越來越多的關注。
  3. It is becoming trends of modem radar technology, which are ultra - wide band, high resolution, low probability of interception, intelligent, according to the points of high tech local war happened last several decades

    針對高技術局部戰爭的特點,現代雷達技術正朝著超寬帶、高分辨、低截獲、多功能、智能化的方向發展。
  4. The radial motion will not only bring the range ambulation and windage to the one - dimension range - profile, but also bring the aberrance and blur produced on given condition that radar signal which is with large product of wide - time and wide - band

    對于大時寬帶寬積信號,目標高速運動不僅會造成目標一維距離像的距離走動和距離偏差,還會造成畸變和模糊。
  5. Through measuring the value of infrared radiation when the complex decoy is burning, it is concluded that the complex decoy ' s energy of infrared radiation is much more than the substrate ' s. through researching the performance of microwave radar ' s transmission and refection within the band of 3mm and 8mm, it is proved that the interference with radar is feasible

    在復合誘餌劑的性能測試方面:對制備出的復合誘餌劑燃燒時的紅外輻射展開研究,發現了復合誘餌劑的紅外輻射能量比基片的紅外輻射能量有很大的增加;開展了對3mm 、 8mm波段毫米波雷達的透射與反射性能試驗,證明了該誘餌劑干擾雷達波是可行的。
  6. Airborne synthetic aperture radar ( sar ) is a kind of active remote sensor, which works in the microwave band and takes aircraft as the working platform

    機載合成孔徑雷達是一種以飛行器為平臺,工作在微波波段的主動式遙感器。
  7. X - band radar signal frequency synthesizer based on dds - driven pll

    波段雷達信號頻率綜合器
  8. The main research works of this dissertation are aimed to design of radar waveform and the application of wavelets in ultra - wide radar, including : the design of a new kind of hybrid radar and the research of time side - lobe suppression for pulse compression, the design of receiver r adio front end in data acquisition of ultra - wide band radar, the time delay estimation based on wavelets ( packet ) analysis

    本文主要進行雷達波形設計研究以及研究小波理論在超寬帶雷達中的應用,集中體現在以下幾個方面:一類新的組合雷達波形設計及壓縮脈沖時間旁瓣抑制技術研究、超寬帶雷達多通道數據採集方法中前端射頻接收部分的設計及研製、基於小波(包)方法的時延估計方法。
  9. The numerical simulation equations of the border curves in term of and as well as the matching rules and the frequency dependence of microwave electromagnetic parameters of a broad - band homogeneous absorbing coating with a finite value of reflection loss are available. these results pointed out the direction to develop rams ". according to the radar - absorbing model, the optimized design of rams with thin - layer, light - weight, broadband and strong - absorbing is available by the simple genetic algorithms, which can effectively conduct the research work of rams to the detail. small but completely, the electromagnetic parameter ' s databases of rams that based on actual microwave absorbers have been set up, the object function has been constructed which conform to the involved goals, the adaptive coding measure is taken which extends the coding length dynamically adapting to the condition of the number of actual absorbers or the precision of thickness and absorber - volume - percentage, the decoding technique is initiated which satisfies light - weight and strong - absorbing as well as thin - layer and broadband by adopting of tracing variable restricting conditions dynamically to control total thickness. when decoding, the variable restricting conditions of thickness are dynamically traced, so gain the radar absorbing coatings of light - weight multiple - layer single - ingredient. similary, of thickness and absorber - volume - percentage, of light - weight multiple - layer multiple - ingredient. also, the rams ' demand to radar - absorb performance as frequency is met making use of the penalty function

    作為遺傳演算法的具體實施:根據本實驗室近來研製的吸波材料,建立了吸波材料的相關數據庫;構造了能真實體現「薄、輕、寬、強」優化目標的目標函數;根據材料的實際數量以及塗層厚度精度要求、吸收劑體積分數精度要求,建立了能動態擴展相應碼長的自適應編碼方法;首創了通過動態跟蹤變量的約束條件來控制塗層總厚度的解碼技術,以此實現了在不弱化寬頻、高強的吸波性能目標的同時,兼顧到薄層、輕質的使用性能要求;在解碼時通過動態跟蹤厚度變量的約束條件,實現了多層單組分吸波塗層對重量輕的要求;通過動態跟蹤厚度變量的約束條件和吸收劑體積分數的約束條件,實現了多層多組分吸波塗層對重量輕的要求;使用權重系數變化法,實現了吸波塗層的分頻段吸波性能要求。
  10. Millimeter wave system has many distinct advantages such as miniaturizing system components, increasing frequency band width, providing higher detectability, uneasily influenced by atmosphere conditions, etc. this makes millimeter wave technique get the increasingly extensive application in radar, communications, electronic warfare, guidance, remote sensing, radiation survey, therefore the research of millimeter system is very vital for civil, the industry, national defense

    毫米波系統具有可以使元部件小型化、增加系統帶寬、提供高解析度以及受大氣條件的影響較小等許多明顯的優點,這使得毫米波技術在雷達、通信、對抗、制導、遙感和輻射測量等技術領域中得到日益廣泛的應用,所以毫米波系統的研究對於民用、工業、國防具有重要的意義。
  11. Comparison of radiosonde observation and l - band radar data and 59 - 701 system

    電子探空儀系統對比觀測分析
  12. For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics

    利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性,建立了半經驗植被雷達後向散射模型; 2 ) .研究發現在農作物等矮小植被覆蓋地表,植被層直接後向散射與植被類型相關,且在植被生長期,雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ) .解決了單參數雷達地表土壤水分反演問題中,雷達入射角和地表粗糙度的影響這一難點問題; 4 ) .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ) .在以上成果基礎上,建立了完整的單參數雷達地表土壤水分變化探測反演演算法,經地表驗證,模型反演地表土壤水分變化值的精度為rmse = 0
  13. Large time - band product signals such as linear frequency modulation signals ( lfm ), nonlinear frequency modulation signals ( nlfm ), phase coded signals and so on are one of key technologies for pulse compression radar systems

    具有大時寬帶寬積的信號,如線性調頻信號、非線性調頻信號、相位編碼信號等是雷達應用脈沖壓縮技術的關鍵之一。
  14. Recently, with the fast development of multi - targets identification and high resolution microwave imaging technologies, ultra - wide band radar has been more and more widely used in object imaging and object detection field

    近年來,隨著集群目標分辨識別、高分辨力微波成像雷達等技術研究的快速發展,超寬帶雷達在目標成像與目標識別領域得到了越來越廣泛的應用。
  15. By using optical cable communication methods, which have advantages of great information transmission capacity, rapid velocity, wide frequency band, strong anti - jamming capability, low circuitry loss and easy construction, modern sky - wave over - the - horizontal radar can achieve information transmission and system control of full coherent radar, which has excellent abilities of security, stabilization, anti - jamming and anti - destruction

    通過採用光纖傳輸技術,利用其信息傳輸容量大,速度快,頻帶寬,抗干擾能力強,線路損耗低,易於施工等特點,實現全相參雷達的信息傳輸和系統控制,具有優良的保密性,穩定性、抗干擾性和抗摧毀能力。
  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 .通過模擬模擬回波信號,產生了帶寬為5mhz ,時寬在9 s ~ 42 s范圍內帶目標和噪聲雜波的lfm信號,並對其進行了頻域脈沖壓縮的分析,抑制雜波並顯示出目標。
  17. This system can process linear frequency modulation signals ( lfm ), nonlinear frequency modulation signals ( nlfm ) and taylor quadriphase code signals with time width under 42 s and band width under 5mhz. the experimental results demonstrate that the specification characteristics meet the requirements of practical radar systems

    該系統可處理時寬在42 s以內?帶寬在5mhz以下的線性調頻信號( lfm ) ,非線性調頻信號( nlfm )和taylor四相碼信號,且技術指標完全滿足實用系統的設計要求。
  18. 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。
  19. Based on the research of x band ground based radar ( gbr ) simulation system, this dissertation mainly discusses the design and application of its sub - systems : return generation ( rg ) and signal processing ( sp )

    本文以科研合同單位提出的x波段地基雷達( gbr )軟體模擬系統的研究課題為背景,對其中的回波生成和信號處理模擬子系統的設計和實現進行了較為深入的研究。
  20. For slow targets whose doppler frequencies fall into clutter doppler band, the performance of frequency domain one - dimension filtering is seriously degraded. in an airborne radar, there is interdependence between the clutter doppler frequency and spatial position. space - time adaptive processing ( stap ) utilizes this interdependence to suppress clutter and get perfect main - lobe and side - lobe clutter suppression

    空時自適應處理利用機載雷達地雜波多普勒頻率與地雜波空間位置的耦合性,根據目標和雜波在空間-多普勒頻域二維空間分佈上的差別對雜波進行抑制。
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