散射通道 的英文怎麼說

中文拼音 [sǎnshètōngdào]
散射通道 英文
scatter channel
  • 散 : 散動詞1. （由聚集而分離） break up; disperse 2. （散布） distribute; disseminate; give out 3. （排除） dispel; let out
  • 射 : Ⅰ動詞1 （用推力或彈力送出） shoot; fire 2 （液體受到壓力迅速擠出） discharge in a jet 3 （放出） ...
  • 通 : 通量詞（用於動作）
  • 道 : Ⅰ名詞（道路） road; way; route; path 2 （水流通過的途徑） channel; course 3 （方向; 方法; 道理） ...
  • 散射 : [物理學] [電學] scattering; radio scattering; scatter; dispersion
  • 通道 : thoroughfare; passageway; pass; enterclose; gallery; drong; tunnel; avenue; alure; way; row; key ...
  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. In term of the probability of communication system and perturbance theory, the model of the effect of srs to error bit ratio in communication system is established. through the way numerical of simulation, limitations to srs to error bit ration of communication system and input optical power, the number of channel etc are discussed. the obtained conclusion has definitely reference value to the design of practical communication

    根據數字通信系統幾率的特性和微擾理論，建立了受激喇曼散射對通信系統誤碼率影響的理論模型，並通過數值模擬討論了受激喇曼散射對系統誤碼率、最大輸入功率和通道數等的限制，獲得了一些對實際光通信系統設計有參考價值的結論。
  3. 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，進行了波形模擬，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，並給出了真實雷達對外輻射試驗的結果，驗證了文中的模擬。
  4. The general nonlinear propagation equations of four - lightwaves in birefringent fibers are deduced. the characteristics of polarization mode dispersion in 4 + 10gb / sdwdm system in dispersion - flattened fibers is studied. our results show that pmd exerts a detrimental influence on 4 x logb / sdwdm system in limiting transmission rate and the channel numbers

    本論文研究波分復用（ wdm ）系統中偏振模色散的影響，主要工作包括下面兩個部分：一、導出了四波長光波在雙折射光纖中傳輸所滿足的一般非線性耦合方程；在此基礎上，研究色散平坦光纖中4 10gb sdwdm系統的偏振模色散特性，並且進一步研究了偏振模色散對不同通道間隔的4 10gb sdwdm系統的影響。
  5. The efficient sppc had been performed with 1 - hz - repetition - rate 532nm nanosecond pulses, in which phase conjugate reflectivity as high as 21. 5 % was obtained. when sppc were operated in ce : batio3 with 532nm, 632. 8nm and 790nm cw lasers, the maximum sppc reflectivity of 54. 1 %, 88. 2 % and 80. 5 % were obtained, respectively. unlike the results reported before that four - wave mixing by stimulated photorefractive backscattering ( spb - fwm ) only exists at short wavelengths while four - wave mixing by total internal reflection ( tir - fwm ) only exists at long wavelengths, both of these two mechanisms coexist at all wavelengths from 532nm to 790nm in our experiments

    通過大量的實驗全面研究了ce ： batio _ 3自泵浦位相共軛特性：在低重復頻率（ 1hz ） 、 532nm調q激光泵浦時最高獲得了21 . 5的位相共軛反射率，而此前報道過的建立位相共軛脈沖光最低重復頻率是10hz ；實驗中發現在532nm 790nm波長范圍內，在不同的波長激光泵浦時，同時存在兩種自泵浦位相共軛機制：全內反射?四波混頻（ tir - fwm ）和受激背向散射?四波混頻（ spb - fwm ） ；在連續激光泵浦時，對532nm 、 632 . 8nm和790nm三種波長，最高分別獲得了54 . 1 、 88 . 2和80 . 5的位相共軛反射率；同時還研究了自泵浦位相共軛光的時間穩定性。
  6. In the third chapter, it was particularly analyzed the impact of the correlation between antenna arrays both sides of transmit and receive, the coexistence of line of sight ( los ) component and scatter power component in the radio propagation environments, and known and unknown channel state information on the capacity of mimo channel. the related simulation results are also given

    第三章著重分析了收發兩端的多天線單元之間存在相關性、同時存在直射分量（ los ）和散射分量的傳播環境、已知和未知通道的狀態信息等因素對mimo通道容量的影響，給出了有關模擬結果。
  7. 2. applying manchester coding theory to meet the end of collision detection and codes judgment effectively. 3. using pulse position modulation ( ppm ) coding theory that is invented especially for optical communication in the air to ameliorate the system ' s performance by improving the system ' s character of pe. 4. taking good advantages of the fledged lan communication protocols and technologies to achieve a new method that has a high rate of capability to cost in building a wireless lan

    論文研究中主要的創新性工作如下： 1 、提出利用光散射通信技術組建無線局域網，方便地實現了廉價而高速的局域網內微機的光互連； 2 、採用曼徹斯特編碼技術解決了光無線通信中代碼判決和碰撞檢測的技術難題； 3 、針對空氣通道的特點，利用ppm編碼技術降低通道誤碼率、改善系統性能； 4 、在光無線局域網中利用現有的成熟有線局域網協議和技術，從而保證了系統的實用性及改善了系統的性價比。
  8. Thirdly, some key technologies of optical layer protection such as fault monitoring, location, switching corporation, protection switching time were studied in chapter 3, a method of optical power monitoring for primary path and otdr monitoring for protection path was provided

    隨后研究了光層保護的網路故障監測、倒換判椐、故障定位、倒換協調、保護倒換時間等問題，提出了主通道光功率監測、備用通道背向散射曲線監測的故障監測方法。
  9. Scatter channel simulator

    散射通道模擬器
  10. This dissertation presents the author ' s main contributions in the studies of the sea optical scatter channel by use of monte carlo simulation on the background of airborne oceanic submarine laser communication system. physical and optical properties of physical constituents in sea optical scatter channel are studied and summarized

    本文以機載海洋激光對潛通信系統為背景，分析和概括了海水光散射通道中的各物理成份的物理和光學性質，討論了海水的固有和視在光學性質。
  11. By default mmus are implemented and they are constructed of 64 - entry hash based 1 - way direct - mpped data tlb and 64 - entry hash based 1 - way direct - mapped instruction tlb

    默認的存儲器管理單元實現由基於64個散列入口的單通道直接映射的數據后備式轉換緩沖區和基於64個散列入口的單通道直接映射的指令后備式轉換緩沖區組成。
  12. Secondly, according to the basic theory of the general spectrometer, in this paper we discuss the fundamental, the compositions and the characters of tcecs. we analyze the main influencing factors for resolving power, such as the dispersion of the x - ray on the detection circle, spectra location error and the aperture width etc. and we put out the ways to resolving the problems

    接下來，本文根據經典光譜儀器的基本理論，著重討論了雙通道橢圓彎晶譜儀的基本原理，及其基本組成和基本特性，並從x射線波長在探測圓上的彌散度、光度參數與探測角之間的關系、狹縫寬度等方面對譜儀的精度和解析度的影響作了一定的分析，並提出了解決問題的辦法。
  13. An iterative receiver is introduced for convolutionally coded distributed mimo with v - blast architecture. a maximum - likelihood ( ml ) iterative detector and a low - complexity turbo detection scheme are proposed. the computational complexity is o ~ ( m _ tslogm ) and o ( m _ t ~ 2m _ r ~ 2s ~ 2m ) respectively

    在考慮大尺度衰落和小尺度衰落的通道條件下，針對通道碼為卷積碼的v - blast類分散式mimo / ofdm系統，設計了發射機結構及其迭代接收方案。
  14. Terrain slope information can be drawn from polarimetric synthetic aperture radar ( sar ) two - dimensional image, so that three - dimensional image can be generated. it differs from two - pass or repeated trace insar that uses interference phase method to obtain topography height. the p - sar three - dimensional image technology uses the stokes matrix formed by two - dimensional images resolution cells, then applying polarimetric synthesize to stokes matrix can produce polarization signature of the scatter cross - section a - (, x ) for any ( ellipticity ) and ( orientation ) polarization state

    這種方法不同於重復軌道和雙通道insar系統，不是利用干涉法提取高度信息，而是利用極化sar二維圖像各分辨單元的stokes矩陣，通過極化綜合估計每個分辨單元的共極化散射特性和交叉極化散射特性（極化指紋） ，以及共極化散射特性最大值時對應的極化橢圓度x利極化橢圓方向角，求解地形的高度輪廓。
  15. Through the analysis of 11 typical mesoscale convective systems occurring at china continent and adjacent ocean on june, july and august, 1998, it is found that 10. 65ghz v channel and 19. 35ghz v channel can well response to the absorbability and emission of liquid water in cloud and precipitation, and that 85. 5ghz v channel and 37. 00ghz v channel can response to the ice scatting in cloud well

    通過對1998年68三個月內發生在我國大陸和鄰近洋麵上的11個中尺度對流系統的分析，發現10 . 65和19 . 35ghz垂直通道能較好的反應雲中液態水和降水的吸收和發射85 . 5和37 . 0ghz垂直通道能較好的反應雲中冰晶冰粒的散射。
  16. A modified real signal model of channelized transmitter is presented that employs multiphase filters and discrete fourier transform to maximize computing efficiency, which can mean much in a radio communication system that requires real - time processing

    特別提出了改進的實信號通道化發射機數學模型，通過利用多相濾波與離散傅立葉變換，減少信號處理運算量，這對于強調實時運行的無線通信系統有重要意義。
  17. This novel transmit diversity technique, which combines channel coding, modulation and signal processing at receive terminal, can make full use of the fading multi - path in the wireless communication systems so as to mitigate the signal attenuation. this technique is mainly designed to combat channel fading in downlink transmission by combining the technique of channel coding and that of array diversity, hence increasing the capacity of wireless communications systems and giving diversity gain and coding gain to them

    基於多輸入輸出（ mimo ）的空時編碼技術是實現未來帶寬資源日益緊張的高速無線數據通信系統的重要技術，它結合了通道編碼、調制和接收端的信號處理，能夠充分利用無線通信通道中多散射體環境所造成的多徑，從而提供信號的抗衰落性能。
  18. Second some scatter location algorithms are analyzed. because one kind of the scatter location algorithm depends on the scatter model, two scatter location algorithms are analyzed which can make precise location to the scatters and mobile station, non - linear least square scatter location algorithm and closed - form scatter location algorithm. the simulation results show that the non - linear least square scatter location algorithm has two limitations : ( 1 ) at least six multipath signal are needed

    然後分析討論了現有的多種基於散射體信息的無線定位演算法，由於基於散射體通道模型的定位演算法太依賴于模型的準確性，因此本文主要分析了對散射體精確定位的演算法中的兩種:非線性最小二乘散射體演算法和閉式散射體演算法，並對這兩種演算法進行了模擬分析。
  19. This paper studies target detection algorithms using polarimetric one - dimension range profile. at first by exploiting polarimetric information in different polarization channels, a fused and enhanced one - dimension range profile is obtained by pwf. then we can detect radar target through integration of scatters in different resolution cells or the number of detected scattering points

    首先利用不同極化通道的相關性信息，將各個極化通道的一維距離像通過極化白化濾波（ pwf ） ，抑制相關雜波，提高信雜比，融合得到一幅改善了的一維距離像，然後通過多個散射中心的能量徑向積累判定目標的有無。
  20. In part one, the reaction scattering for the h3 system is studied using three - dimensional quantum mechanical coupled channel distorted wave approximation. in part two, a new form is proposed for interaction between an atom and a diatomic molecule

    本文分兩部分：第一部分用三維量子力學耦合通道扭曲波方法研究了三氫系統的反應散射；第二部分提出了一種原子與雙原子分子相互作用的新形式。
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