hf radar 中文意思是什麼

hf radar 解釋
高頻雷達
  • hf : Hf ＝ 【化學】 hafnium.
  • radar : n 〈美國〉【無線電】 〈radio detecting and ranging 之略〉 雷達，無線電探測器 （＝〈英國〉 radiolo...
  1. 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。
  2. Design of software radio receiver for hf sea state radar

    高頻海態雷達軟體無線電接收機的設計
  3. Because of the presence of the first - order sea echoes with dominant amplitude, the doppler resolution technique which based on the range - velocity transformation is needed to extract the targets information in hf radar

    高頻雷達工作在擁擠的短波波段，由於絕對占優的一階海浪回波的存在，必須採用基於距離?速度譜變換的多普勒頻率分辨技術來處理雜波，以提取目標信息。
  4. Super - resolution spatial spectrum estimation is applied in this dissertation to realize bearing resolution by utilizing the different bearings between targets and first - order sea echoes. the simulation of radar echoes in one resolution cell is presented based on the theoretically analyzing hf sea clutter sea clutter reflection characteristic and sea echo spectrum stretching mechanics

    本文從分析高頻海雜波反射特性以及平臺運動引起海浪展寬機理入手，建立便於理論研究的一階展寬的海雜波和二階海雜波模型;在分辨單元上對雷達回波信號進行了模擬。
  5. Othr ( over - the - horizon radar ) is a kind of hf ( high frequency ) radar with great expectation, which has arisen great concern worldwide because of its large coverage, anti - stealth character and so on

    超視距雷達（ othr ）是一種具有較大發展前景的高頻雷達，以其覆蓋距離遠、覆蓋面積大和抗隱身等優良特點受到各國學者的廣泛關注。
  6. Because of the limited cross - range resolution, high frequency ( hf ) over - the - horizon ( oth ) radar has the poor ability to determine the number of group targets and identify the large warship such as aircraft carrier in engineering applications

    我國的高頻雷達已進入工程化應用階段，但由於受分辨能力的限制，在群組目標的個數分辨及大型船隻的識別等方面仍有不足之處。
  7. Hf radar can measure the sea surface parameters. on oceanography, hf radar can be used in researching the property of ocean wave, supervising the sea status timely, getting offshore wind field picture as well

    它在海洋學上可用於研究海浪性質，能實時監測海況而服務于航海業、海洋工程、海洋警戒、海洋漁業和海洋平臺作業等，還能獲取氣象預報中所需要的海面風場圖。
  8. Except with the advantages of long range early warning and anti - stealth, rending anti - radiation missiles useless, also for its inherent flexibility and mobility that enlarge warning region, high frequency ship - borne surface wave over - the - horizon radar ( hf sswothr ) has been widely used in military domain

    高頻地波艦載超視距雷達具有遠距離預警、反隱身、抗反輻射導彈攻擊等方面的顯著特點。而且載艦本身的靈活性、機動性又提供了更廣闊的警戒空間，因此它在軍事上具有廣闊的應用前景。
  9. 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。
  10. For ensure the reliability of hf radar in congested environment, the radar signal with discontinuous spectra has attracted increasing attentions

    為保證高頻雷達在惡劣環境下正常工作，非連續譜雷達信號日益受到重視和研究。
  11. This paper introduces several methods retrieving wind direction from hf radar echo doppler spectrum and analyses the feature of those methods

    本論文介紹了現有的從高頻雷達回波多普勒譜中提取風向的幾種方法，分析了這幾種方法的不足之處。
  12. It introduces the phase noise measurement method of hf radar ' s transmitting signal, especially the measurement method of low phase noise which is close - in to carrier frequency

    指出了在高頻雷達發射信號相位噪聲的測量，特別是近載頻低相位噪聲的測量。
  13. The ionosphere contamination imposing on the high - frequency ( hf ) radar echoes has to be suppressed since it severely degrades the detection performance of hf radar

    摘要高頻雷達回波信號受到電離層污染從而影響了雷達的探測性能，因此需要進行去污染處理。
  14. In order to hold the performance of the antenna array of hf radar the length of antenna array is also very long

    高頻超視距雷達工作在短波波段，為了保持一定的天線陣性能，天線陣尺寸通常也較大。
  15. In this paper, the mechanism of the ionosphere contamination from the ionosphere distortion is exposed for the first time by analyzing the process of hf radar signal processing

    該文通過對高頻雷達信號處理過程的分析，闡明了電離層擾動對回波信號污染的機理。
  16. Despite this isar signal processing method had been widely applied, it was rarely used in hf radar systems. in this paper, we probe into the application of the isar signal processing in hf radar systems elementarily

    雖然以往的isar信號處理技術研究碩果累累，但是在高頻雷達領域中的應用還是較少見的，更沒有具體演算法供參考，因而本文對逆合成孔徑雷達信號處理在高頻雷達系統中的應用進行初步探索研究。
  17. According to the high spatial correlativity of the ionosphere contamination, then the rank one phase error estimation ( rope ) auto - focus method in imaging radar is suitably modified and applied to the ionosphere decontamination of hf radar echoes

    根據電離層污染具有高度空間相關性的特點，將成像雷達中的秩一相位誤差估計聚焦方法適當修正後應用於高頻雷達回波信號去電離層擾動污染。
  18. In the highly crowded hf band, available continuous bandwidth is very narrow, this threaten the viability of hf radar based on the continuous spectra signal system seriously

    在擁擠的高頻頻段，可用的連續帶寬比較窄，基於連續譜信號體制的高頻雷達的生存能力受到嚴重威脅。
  19. The 3d radar display system described in this paper is a part of the hf radar simulation platform, which provides the function of 3d display for the simulation platform

    因此，開發高頻雷達三維顯示系統是十分必要的。本文所設計的三維顯示系統可為現有的高頻雷達系統模擬平臺增添三維顯示功能。
  20. Combine with the project " hf ground wave radar supervise sea status " of state 863 project, retrieving wind direction from hf radar doppler spectrum and the showing of wind field, current field, wave field are researched in this paper. the problem of how to represent the sea surface parameters by computer is concerned, too

    本文結合863 - 818 - 01 - 02課題「高頻地波雷達海洋環境監測技術」 ，研究了由高頻雷達海面回波提取風向信息和海面風場、浪場、流場信息的計算機表徵方法及其數據傳輸反演和表徵的若干問題。
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