radar frequency 中文意思是什麼
radar frequency
解釋
雷達頻率-
The realization of quick acquest under very low snr and big frequency shift is one of the key problems of lpi radar. we designed a new receiver which needs less computation spend without any decline of the performance of the radar
如何在較低輸入信噪比和較大頻偏的條件下實現擴頻碼快速捕獲是碼同步的難點，本文在不損失系統性能的基礎上，設計了一種結構簡單的接收機實現方案。 -
The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar
電離層是隨機時變，各向異性，非均勻、色散的復雜介質。為了保證依賴于電離層進行的短波通信質量，必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與短波通信或高頻天波雷達相關的天波傳播通道的狀態，對短波通信和天波雷達工作起了重要的輔助作用。 -
By using the processing method of sliding time window, the problem of the periodicity range ambiguity is solved. meanwhile, the problem of range ambiguity which is produced because the range of target is biger than the maximum range of radar is also solved by using this method. then, the pulse width parameter which is the most important in the parameters of fmicw is analyzed. the stricter restrict is given to ensure the range spectrum has only one beat frequency after signal processing. at last this thesis introduces the different signal processing methods of fmpcw and fmicw
同時利用該方法解決了fmpcw信號的由於目標距離超過雷達的最大單值測距范圍而引起的距離模糊問題。然後對fmicw波形參數中最為重要的脈沖寬度進行了分析，給出了更為嚴格的約束條件，保證了信號處理后距離譜峰值的唯一性。最後，分別介紹了fmpcw和fmicw信號的不同處理方式，並對兩者不同的時域濾波性能進行了比較，並對二者的差異進行了分析。 -
Second, this paper analyzes the time - frequency distribution of the clutter from airborne pulse doppler radar ( pdr ). the side - lobe clutter, which is the main factor to influence the pdr, is analyzed and calculated. based on the simulation of typical geometry of the land, we analyze and discuss the side - lobe clutter and concluded that the dft of can be considered as the phase of the coho
並且根據各種典型地貌的近似模擬，從統計特性上和頻率域上對脈沖多卜勒雷達的旁瓣雜波進行了分析討淪，還得出脈沖多卜勒雷達的dft可以近似地看作相參積累，並在程序的編制中利用了這一個結論。 -
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。 -
Whatever it is radar, eccm equipment, communication equipment or instrument, frequency source with high stability is needed to guarantee the quality of carrier signal
無論是雷達、電子對抗，還是通信、儀器設備等都需要高穩定度的頻率源，以保證載波信號的質量。 -
Additional trials on aeronautical telecommunication network ( atn ), surface movement guidance and control system ( smgcs ), electronic flight strips ( efs ), secondary surveillance radar mode s data link and very high frequency data link ( vdl ) are planned for this year
此外，有關航空通訊網路、地面活動引領管制系統、電子飛行紙條、 s模式的二次監察雷達數據鏈路和甚高頻數據鏈路的進一步試行運作，亦計劃在本年進行。 -
Letter designations for radar - frequency bands
雷達頻帶的字母標志 -
Range estimation of linear frequency modulation continuous wave radar
線性調頻連續波雷達的距離估算 -
Signal processor is a important part of high frequency ground wave over - the - horizon radar
信號處理機是高頻地波超視距雷達的關鍵部件之一。 -
In this project high frequency ground wave soft radar ( hfgwsr ) uses software radio technology to control radar functional mode
本課題項目中的軟體高頻地波雷達利用軟體無線電技術，實現對雷達工作狀態的控制。 -
During the near three decades, high - frequency ground wave radar detecting for sea has been regarded for its high performance by many countries
近三十年來，高頻地波對海探測雷達因其本身所特有的優點而引起了許多國家的高度重視。 -
Then, i design a new signal processor basing on the development of hardware and the signal process of high frequency ground wave over - the - horizon radar
接著，根據當今數字信號處理器件的發展和高頻地波雷達的信號處理過程，提出信號處理機的系統設計方案。 -
High frequency ground wave radar for near ocean inspection and ocean remote sensor is a method that use ocean echo wave dopier spectrum to deduce the parameters of ocean situation
高頻地波雷達近海監測和海態遙感技術是一種利用海洋回波多普勒譜反演海態參數的方法。 -
To the principle of single - station high - frequency ground wave detection radar, simple pulse wave was chosen, but this wave has many limitations, so continuous signal wave was preferred
從雷達信號波形選擇來看，對于單站高頻地波超視距雷達體制，最初採用簡單脈沖波形。但這種波形存在著許多缺點，最終採用連續波信號體制。 -
Based on the research mentioned above, the paper introduces the method of how to realize basal software, combing the processing of high frequency ground wave over - the - horizon radar signal and the capability of dsp
在此基礎上，本論文又針對工程實現的具體要求，結合高頻地波超視距雷達信號的信號處理方法與dsp性能，敘述了信號處理機的基礎軟體編程的具體實現。 -
The dissertation aimed at designing a new signal processor basing on the development of hardware and the signal process of high frequency ground wave over - the - horizon radar. after that, basal signal software of dsp, a important part of processing card, is designed
本課題目的就是根據當今數字信號處理器件的發展和高頻地波雷達的信號處理過程，提出信號處理機的系統設計方案，然後對其中信號處理板中的主要處理部件dsp進行基礎軟體的開發。 -
High frequency radar is also a high frequency ground wave super resolution radar used on the seaside, and meantime it is one of projects of national 211 for building subject. this paper based on high frequency radar and modern signal processing describes the component of the high frequency radar on function and hardware. the signal that the radar system used mostly decides the capability and the complex of the radar
雷達系統所用的信號體制、信號形式決定了在很大程度上決定了雷達的性能指標，雷達系統的復雜度，本文主要研究基於軟體高頻雷達的多體制信號的數字化產生與接收，目的在於產生一種或者多種能夠軟體高頻雷達所適用的信號，並且這種信號不會給小型化的系統處理帶來過高復雜性。 -
Application of large - scale programmable logic device in radar frequency synthesizer
大規模可編程邏輯器件在頻率綜合器中的應用 -
The article starts with the vibrating impact on the crystal oscillator in the radar frequency synthesizer, and analyses the phase noises of crystal oscillator under the random vibration condition
摘要從振動對雷達頻綜器中晶體振蕩器的影響入手，分析晶體振蕩器在隨機振動條件下的相位噪聲。
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