調頻雷達系統 的英文怎麼說

中文拼音 [diàobīnléidáxìtǒng]
調頻雷達系統 英文
fm radar system
  • 調 : Ⅰ動詞1 （配合得均勻合適） harmonize; suit well; fit in perfectly 2 （使配合得均勻合適） mix; adju...
  • 頻 : 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...
  • 雷 : 1. （雲層放電時發出的響聲） thunder 2. （軍事上用的爆炸武器） mine 3. （姓氏） a surname
  • 達 : Ⅰ動詞1 （暢通） extend 2 （達到） reach; attain; amount to 3 （通曉; 明白） understand thoroughly...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 調頻 : frequency modulation （fm）; frequency adjustment調頻磁帶錄音機 f m magnetic tape recorder; 調頻...
  • 雷達 : [訊] radar （縮自 radio detection and ranging）
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  1. High precision ad chip is used for intermediate frequency data sampling and fpga of virtex - series is used for the implementation of intermediate - frequency orthogonal system, which includes the sequencing control design for mult - channel radar system with verilog, the application of ip core of digital filter and fifo, as well as the communication control module with dsp. as the master control part, the software programming for the communication between dsp and fpga is designed. the experimental result with hardware circuit shows the design is valid and practical

    採用高精度的adc晶元完成中頻采樣，通過virtex -系列fpga設計中頻正交系統，主要包括通過verilog語言實現多路雷達中頻接收的時序控制，通過濾波器ip核實現濾波器的設計，以及利用c語言實現dsp的通訊控製程序設計。並給出了fpga在資源和速度上一些優化的方法，調試過程中影響中頻正交接收性能測試的因素。
  2. Considering the fact that the analog system is not so good as the digital system on the respect of variation of bandwidths and on the respect of switch between different bandwidths. this paper proposes to adopt the dds ( direct digital synthesis ) technique that produces chirp signals of different bandwidths to improve the situation of losing tracks for the ocean satellite altitude indicator in measuring coarse surfaces

    現在的雷達基本上採用模擬系統產生線性調頻信號，由於模擬系統在帶寬變化方面和不同帶寬間切換方面不如數字系統，本文採用dds （ directdigitalsynthesis ）技術產生不同帶寬的線性調頻信號以改善海洋衛星高度計在測量粗糙表面時存在的失鎖現象。
  3. Through utilizing the shift multiplication characteristics of m series, this kind of radar system eliminates the bad effect of doppler frequency. in theory, the doppler tolerance of the radar system can reach the half of the code rate with proposed echo pretreatment method in this paper

    從理論上說，應用於該雷達系統的信號處理方法可以使得雷達系統的多普勒容限達到偽碼子碼重復頻率的一半，從而使偽碼調相雷達可以有效地發現高速目標。
  4. Pulse compression technique is widely used in modern radar systems. it solves the contradiction between the range and velocity resolution. large time - bandwidth product signals such as linear frequency modulation signals ( lfm ) are used in pulse compression technique to improve the resolution in range domain

    現代雷達系統廣泛採用脈沖壓縮技術，在確保雷達作用距離和速度分辨力的前提下，採用大時帶積脈沖壓縮信號:如線性調頻（ lfm ）信號提高距離分辨力。
  5. This article analyses the signal characteristics of several typical cw radars, and presents the principle and application of doppler radar. as one focal point, this article researches the generation and math characteristics of pseudorandom code modulated signal, analyses the spectrum of pseudorandom code phase modulation radar signal, and presents this kind of signal ' s application in distance and speed measurement. this article also researches the application of mono - pulse amplitude comparison radar in angle measurement finally, this article elaborates the working process of crs in uast

    本文分析了幾種典型的連續波雷達信號的特性，介紹了多普勒雷達的原理和應用；研究了偽隨機編碼信號的產生和數學特徵，著重分析了偽碼調相連續波雷達信號的頻譜，及其在雷達測距、測速方面的應用；研究了單脈沖幅度比較體制在雷達測角中的應用；最後，闡述了超近反導系統中復合體制雷達的工作過程。
  6. To improve anti - jamming technique by spread spectrum close to monochromatic frequency, so that enhance the ability of anti - active - jamming and anti - passive - jamming, anti reconnaissance, anti - radiation missile, anti - stealth, by means of multi frequency spread spectrum and hopping spectrum instead of mono - frequency spread spectrum, realizing strong processing system for anti - interference signal, providing the method of generating of chirp signal and corresponding matched filter system

    摘要為改進線性調頻雷達系統所採用的在單色頻率點附近擴譜抗干擾技術，加強制導雷達站具備抗有源、無源干擾，反偵察，抗硬殺傷的反幅射導彈和反隱身的能力，通過將單頻點擴譜改為多頻點擴譜跳譜，實現了高抗干擾信號處理系統，給出方案中在中頻段實現的線性調頻信號產生方法以及對應的匹配濾波處理系統。
  7. This thesis discusses the pulse doppler ( pd ) weather radar signal processing system including digital intermediate frequency ( if ) receiver, especially on the application of if sampling and digital demodulation technique in pd weather radar signal processing system, the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation, ground clutters elimination algorithms and a typical engineering realization scheme of pd weather radar signal processing system

    本論文研究的是採用數字中頻接收技術的脈沖多普勒氣象雷達信號處理系統，重點研究了中頻采樣及數字解調技術在脈沖多普勒氣象雷達信號處理系統中的應用、正交雙通道幅相不平衡對氣象回波譜估計的影響、地雜波濾波演算法，以及脈沖多普勒氣象雷達信號處理系統的具體工程實現。
  8. Pulse compression technique is widely used in modern radar systems. large timeband product signals such as linear frequency modulation signals ( lfm ), nonlinear frequency modulation signals ( nlfm ), phase coded signals and so on are used in pulse compression technique to improve the resolution in range domain

    現代雷達系統廣泛採用脈沖壓縮技術，在確保雷達作用距離和速度分辨力的前提下，採用大時帶積脈沖壓縮信號:如線性調頻（ lfm ） 、非線性調頻（ nlfm ）和相位編碼信號等，提高距離分辨力。
  9. The purpose of this thesis is to introduce the digitalization realization scheme, technology of if receive and pulse compression for lfm pulse compress radar, and how to implement them with fpga and other hardware circuits in our system

    本文針對線性調頻雷達中對脈沖信號回波的中頻接收以及脈沖壓縮處理系統的全數字實現方案及技術進行了研究，並對其進行了硬體實現。
  10. This method offers more precise geometry for spaceborne sar system design and simulation. 3. in the analyzing on the radar doppler properties, under the ellipsoid earth model and ellipse orbit model, considering the earth rotation, the radar doppler properties with different orbit eccentricity are compared, and the fact that orbit eccentricity affects doppler frequency rate is found

    在雷達多普勒特性分析中，論文採用橢球地球模型和橢圓軌道模型，結合地球的自轉，通過不同偏心率下雷達多普勒特性的比較，研究了軌道偏心率對合成孔徑雷達系統設計與模擬軟體研究雷達多普勒調頻斜率的影響。
  11. In this thesis, the signal express format and characteristic of pulse internal phase modulation and pulse external frequency agile is introduced, and the signal design is processed based on the demand of radar system, the restriction of parameter design and various code format

    本文首先介紹了脈內調相脈間跳頻信號的表達形式和特點，並根據雷達系統的需求和參數設計的約束條件以及不同的編碼形式進行了信號的設計。
  12. Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing, pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction. ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain. ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain

    通過大量的理論分析和模擬實驗，得到了一批具有一定價值的結論：從信號處理的角度出發，對于脈沖式干擾，能夠運用時域滑動窗口積累的方法去掉，並且通過預測插值得到較好的恢復；對于高斯白噪聲干擾，在時頻變換域內應用時頻分析方法可減小其對分散點目標的干擾；對于射頻噪聲，通過平均距離頻頻法和頻域陷波的方法可以去掉；從改變合成孔徑雷達系統角度出發，類似雙基地雷達能夠避免各種干擾，對發射信號進行調幅，調相以及改變調頻斜率都是較好的抗干擾方法。
  13. This paper goes on with analysis of the phased array radar calibration theory and compare of different schemes, then the best is adopted. 2 mhz digital circuit mainly composed of dds ( direct digital synthesis ) chip, which carries out the shift of the phase and the limit of the amplitude, has been designed and debugged successfully. it is used to substitute for the conventional phased shift circuit and amplitude limiting circuit which work at the radio frequency, so the all - digital transmit channel of phased shift array radar is achieved

    本論文研究的重點是：針對傳統相控陣雷達系統收發（ t r ）組件中的移相和限幅功能均在射頻段完成，大膽利用直接數字合成（ dds ）晶元組成頻率在2mhz左右的數字電路代替傳統相控陣雷達在射頻段進行移相和限幅的電路，從而組成全數字發射通道，使對相位和幅度的控制和調試更方便快捷，並設計具體的電路驗證此方案的可行性。
  14. In the first part, the fundamentals of lfm signals are introduced. the relationship between distance resolution and bandwidth, speed resolution and signal duration are the emphases to be discussed. it indicates the importance of using lfm signals with large duration and bandwidth in uwb - sar system

    全文分以下四部分：第一部分討論了線性調頻信號的基本理論，指出了距離解析度和速度解析度與信號時寬和帶寬的關系，說明了在雷達系統中採用大時帶寬線性調頻信號源的必要性。
  15. This dissertation introduces the work principles, hardware circuit structure and application of a pint - sized multifunctional radar echo generator, which can generate various waveforms needed. we can modulate the doppler frequency and adjust the time delay of the waveform to validate the performance the radar system

    該設備體積小、操作簡便、便於攜帶，可模擬lfm 、 nlfm 、單頻、相位編碼等多種脈沖信號波形，具有較寬的多普勒調制和時間延遲調節功能，能有效驗證脈沖壓縮與信號處理單元的工作性能，準確評估雷達系統的分辨力、威力范圍等技戰術指標。
  16. This paper comprehensively described the basic principles and charac teristics of bistatic ( multisstatic ) radar system via commercial television and fm radio signals, introduced the present situation of the research and developme nt ( r & d ) of new generation of this kind radar systems, presented our view on the r & d of this kind bistatic ( multistatic ) radar system

    闡述了利用電視、調頻廣播載波信號的雙（多）基地雷達系統的基本原理與特點，介紹了新一代基於商用電視、調頻廣播載波的雙（多）基地雷達系統的研製現狀，並提出了對發展這種雙（多）基地雷達系統的看法。
  17. Then to meet the problem of the separate between receiving and transmitting for single - station radar system in continuous wave principle, we introduced frequency modulated interrupted continuous wave ( fmicw ). in early days, the pseudorandom codes were often used in fmicw. usually m - sequence is used to intertupt frequency modulated continuous wave

    之後，為了解決連續波體制下，單站收發共址的雷達系統的收發隔離問題，又普遍採用了截斷的線性調頻連續波信號形式，叫做線性調頻中斷連續波信號（ fmicw ） 。
  18. Waveform design and generation is one of the key techniques in uwb - sar development. with an air - borne uwb - sar system as the background, the foundational theory of lfm signal, the systemic error model and the design and implementation of lfm generator were discussed in this paper. the paper is composed of four parts : first, the foundational theory of lfm ( linear frequency modulated ) signal was studied

    超寬帶信號的產生方法和系統設計是實現超寬帶合成孔徑雷達的一項關鍵技術，本文以機載合成孔徑雷達系統的研製為背景，討論了線性調頻信號的基本理論、基於數字技術產生線性調頻信號的方法及其誤差模型、系統的設計實現技術及系統性能的測試和評估等內容，全文分以下四部分： ?第一部分主要討論了線性調頻信號的基本理論。
  19. Then on one hand, author makes researches of anti - jamming against pulse jamming 、 gauss white noise jamming and radio frequency noise jamming from the side of signal processing. author exercises much signal processing knowledge of time - domain sliding window accumulation 、 wavelet analysis 、 time - frequency analysis and linear prediction and carries out many simulation experiments. on the other hand, author proposes the anti - jamming methods of using a sar similar to double - base radar and modulating the amplitude 、 the phase of emission signal and changing the frequency modulation slope from the side of changing sar system model

    作者首先提出了合成孔徑雷達抗干擾的定義、分類以及評價抗干擾方法好壞的主客觀標準；然後，一方面從信號處理的角度出發對脈沖式干擾、高斯白噪聲干擾以及射頻噪聲干擾進行了抗干擾研究，其中運用了時域滑動窗口積累，小波分析，時頻分析以及線性預測等信號處理知識，做了大量的模擬實驗；另一方面，本文基於改變合成孔徑雷達系統模式提出了利用類似雙基地雷達來抗干擾，以及對發射信號進行調幅、調相以及改變調頻斜率來抗干擾，同樣做了相應的模擬實驗。
  20. In this paper, a new advanced general wide - band signal generator module is developed, which uses high speed fpga as its control - unit. the module can work in any system with different bandwidth and can generate any kind of lfm signal, whose bandwidth is less than 200mhz, and time - width is less than 870us

    該模塊具有標準的輸入輸出介面，不同波段、不同帶寬的雷達系統均能直接使用，可以產生帶寬200mhz以內、脈沖寬度870us以內的線性調頻信號，具有預失真功能，能補償系統的特性特性失真，還可直接通過4倍頻或8倍頻實現帶寬的擴展。
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