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pulse radar 脈沖雷達。

pulse ripple

The study in this paper based on the national fifteen tackling key problem - “ life detection and orientation of earthquake emergency response system “ and project of no . 10 research institute of china electronics technology group corporation - “ pulse radar target detection and location technology “ , has completed the study and simulation of the relative technology of tdoa , which was a theoretical and technological supporting to the two projects 本論文在國家十五重點科技攻關課題“地震救助生命搜索與定位技術研究”和中國電子科技集團第十研究所“脈沖輻射源監測和定位技術”國際合作項目中,完成了對其中時差定位相關技術的研究和仿真,為工程項目的實施提供理論和技術支持。

In this dissertation , the principle of fem in em was discussed , then the pulse radar and three - layered pavements were analyzed with 20 - noded and 4 - noded isoparametric elements respectively . then , corresponding fem programs are compiled in fortran90 . so a forward model was built up to describe the transmitting of electromagnetic in the radar and pavements , according to the system identification method 針對上述情況,本文系統闡述了電磁場有限單元法的基本原理,然后采用二十節點、四節點等參單元分別對pulse雷達實體及三層路面系統進行了靜態場和時變場的有限元分析,初步建立了電磁波在三層路面中傳播的正演模型,同實測波形相比,模擬效果較好,并用fortran90語言編制了相應的三維、二維有限元程序,具有較好的可讀性和可移植性。

Chapter 3 discusses millimeter passive circuits in t / r module , of which the fin - line filter is mainly discussed . chapter 4 is the focus the whole paper . first introduce the radar principle , then make an explanation of angle measurement in pulse radars , secondly narrate the design process of the whole module 第四章是全文的重點,首先介紹了現代雷達系統的基礎,并對適合本毫米波t / r組件的單脈沖和差體制測角的方法做了簡要的介紹,接著對該組件的設計流程做了較為詳盡的闡述。

In our nation , we have worked on the researching of continue radar signal ' s phase noise mesurement equipment in the past . but the equipment for pulse radar signal is still in blank . the object of this dissertation is to study on the denotation of the radar pulse signal ' s phase noise and its measuring method 本文的目的是對射頻雷達脈沖信號的頻率穩定度的表征和測試設備的研制進行研究,討論了雷達脈沖信號的測試方法,主要對譜估計法測量射頻雷達脈沖信號相位噪聲的系統方案進行理論的分析,并對實現過程中技術上的難點重點問題的解決進行論證。

Angle measuring precision phase sum / difference mono - pulse radar receiver is not only related to accurate strike to target , but also the base of successful penetration of interceptor missile for tbm anti - guidance system using two point sources of correlation , which is one of radar angle fraud technologies . thus , research on technical criteria influencing angle measuring precision of receiver is meaningful 相位和差單脈沖雷達接收機的測角精度,不僅關系到是否能精確地打擊目標,而且是tbm反制導系統利用相干兩點源雷達角欺騙技術,成功突防攔截導彈的基礎,所以對影響測角精度的接收機各項技術指標進行研究具有重要意義。

Based on mono - pulse radar system and the analysis of terrain echoes , a geometrical model of air to ground ranging is constituted . by using the signals received from the sum and difference channels of terrain follow radar , a group of the expressions for terrain echoes are educed and characteristics of these echoes are obtained . according to the characteristics of the echoes , the theory and method of pass zero detection of difference channel and its applications are discussed in detail 針對一維單脈沖雷達體制,分析了地形目標回波特性;建立了地形跟隨雷達空地測距的幾何關系;利用雷達收發信號,導出了地形跟隨雷達和差接收通道的回波信號表達式,進行了波形仿真,得到了地形跟隨雷達的地面散射產生回波在時域中的特性;根據和差回波特性,闡述了差信號過零點檢測測距的原理和方法及工程實踐中的應用,并給出了真實雷達對外輻射試驗的結果,驗證了文中的仿真。

Advantages , disadvantages and limits of arm are thoroughly examined using signal processing methods . based on the above , incoherent and coherent two - point - source decoy methods and modified coherent two - point - source decoy methods to deflect arm are brought forward . arm ’ s homing heads are generally of mono - pulse structure , so coherent two - point - source ’ s interference resembles that to mono - pulse radar except that interference to radar belongs to far field scope , but interference to arm varies from far field to near field because relative distance drastically changes between the homing head and the two - point - source with missile ’ s homing head continually approaching the target Arm的導引頭一般為單脈沖體制,因此,相干兩點源對導引頭的干擾類同于對單脈沖雷達的干擾,不同的是:對雷達的干擾都是遠場,而導引頭隨著導彈不斷接近目標,兩點源與導引頭的相對位置發生劇烈變化,由遠場變化到近場;導引頭天線口面上的合成場也發生了大的變化,相位波前的畸變產生干擾,這就是相干兩點源誘偏的基本思想。

This paper analyses the effect in receiver of each technical criteria of mono - pulse radar , detailedly analyses the influence to angle measuring precision of each technical criteria of the receiver and results in technical criteria which is important to angle measuring precision . then , measuring and compensating methods on channel discrepancy 論文分析了單脈沖雷達接收機的各項技術指標在接收機中的作用,著重分析了接收機的各項技術指標對測角精度的影響,得出了對測角精度而言,較重要的接收機技術指標,論文還討論了通道不一致性的測量和補償的方法。

Secondly , two applications of gpml abc in modeling pulse radar are shown : one is detecting pipeline underground , and the other is its application to highway technology . thirdly , with back - projection algorithm , we have formed the image of tree - trunks . in summary , the application of fdtd in uwb fopen so far is impressive 然后,對適用于有耗媒質的gpml邊界條件的應用開展了深入研究,對脈沖雷達探測地下管道和測量高速公路瀝青層厚度進行了fdtd算法模擬。

To the calibration of indentity of amplitude and phase in mono - pulse radar , this paper describes the principle , arithmetic and realization method , analyzes the key process of automated calibration and the key problem of software design 摘要針對單脈沖測量雷達中的系統幅相一致性補償問題,給出了幅相一致性標定自動化標定的原理、算法和軟件實現方法,分析了自動標定過程中的關鍵過程和軟件設計時主要問題。

Lfmcw radar also has disadvantages of restricted detecting distance and range - velocity coupling , etc . its applications are not as wide as pulse radar . the development level of correlative theories drops behind pulse radar too Lfmcw雷達也存在著作用距離短、運動目標距離-速度耦合等缺點,其應用遠不及脈沖雷達廣泛,有關理論和技術的發展水平也大大落后于脈沖雷達。

Millimeter - wave switch is a kind of the millimeter - wave control circuits , it is widely applied in receiving protection of pulse radar and radio modulator , and it ' s also one of the very important parts of radar and test system 毫米波開關是毫米波控制電路的一種,它廣泛應用于脈沖雷達接收保護和射頻調制器,是雷達利測試系統中的關鍵部件之一。

According to the need of task , it is stated in this paper that how to program cpld with vhdl , how to design and make the ranging circuit of three millimeter pulsed radar 根據課題的需要,本文用vhdl語言對cpld編程,設計并制作了一個用于三毫米脈沖雷達的測距電路,實現了減小體積和提高測距精度的目的。

In chapter there in the paper , the author analyzed the tdoa extraction technologies can be used in the pulse radar target detection and location technology 其中對于基波信號時差提取技術的研究,在“地震救助生命搜索與定位技術研究”課題中有關定位技術的應用中取得較好效果。

Relative to pulse radar , lfmcw radar is also immature . this dissertation solves a series of key academic and technical problems through theories analysis and simulations 但是,相對于脈沖雷達來說, lfmcw雷達依然處于不成熟的階段,相關理論問題還缺乏全面而深入的研究。

7 . in chapter 8 , a new method for estimating the doppler and multipath time delay of the overlapping echoes for lfm pulse radar by only one period pulse signal is presented 7 .在第八章提出了一種對lfm脈沖雷達回波d叩pler頻移和多徑時延進行聯合估計的方法。

Synthetic aperture radar ( sar ) is a kind of coherent pulse radar which appeared in 1950 . it can improve space resolution by fully using the signals “ coherence 合成孔徑雷達( sar : syntheticapertureradar )是20世紀50年代發展起來的一種相干雷達。

In this paper , wavelet neural network is used to extract the signal feature of three millimeter pulsed radar , and the simulation is done by the computer 本文將小波神經網絡用于三毫米脈沖體制雷達回波信號特征的提取并做了計算機仿真。

Furthermore , the question of feature extraction of three millimeter pulsed radar echo using wavelet neural network is investigated 此外,論文還研究了用小波補經網絡提取三毫米脈沖體制雷達回波信號特征的問題。