doppler shift effect 中文意思是什麼
doppler shift effect
解釋
多普勒頻移效應-
The reflected light spectrum from interaction of uv laser with solid plasma was measured to investigate the frequency shift due to doppler effect of expanding critical density
測量了紫外超短脈沖激光等離子體中的光譜頻移，分析表明是有質動力和等離子體熱壓力共同作用的結果。 -
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。 -
The research consists of several aspects as follows : the characteristics of uwac is analyzed, including the multi - path effect, the doppler shift effect, etc. then the mathematics " model of uwac is given
研究內容主要包括以下幾個方面： ?分析了多途時間擴展、多普勒頻率擴展等水聲通道的物理特性及水聲通道的數學模型。 -
First, the structure of the second generation ctdrs isl was discussed in this paper, the characteristic of coverage in the second generation ctdrs by the characteristic of orbit and the simulation model of isl was analyzed then the effect of the isl establishing process analyzed. second, the discussing and analyzing focus on the characteristic of signal during the establishing isl process, establishing the orbit model, the technology of doppler frequency shift capturing and tracking sequence and the effect of background noise, then the theory analyzing the parameters we have just mentioned, and this will support the reference for the implement of project. the simulation and test of the isl of ctdrs and analyzing from theoretical basis to implement of simulation were mainly focused in this paper
其中討論了二代中繼星捕獲跟蹤系統星間鏈路的模擬方案的組成結構，利用軌道特性對二代中繼衛星系統的覆蓋特性進行分析，搭建了星間鏈路的模擬模型，其中包括中繼衛星和用戶衛星在內的軌道模型、星間鏈路模型、用戶星信號調制模型等，並對星間鏈路建立過程的影響進行分析;重點針對星間鏈路建立過程的信號特性，軌道模塊的建立、多普勒頻移技術、背景噪聲影響、載波的捕獲與跟蹤技術等進行了實際參數的設計與理論分析。 -
With the development of information technology and internet, net communication, satellite communication, all kinds of conference call and in some special conditions, like underwater acoustic communication demand it more reliable and can keep secret and be low probability of interception. because of the effect of multipath and doppler shift, the signals through the channel fade rapidly
隨著人類向信息技術和信息網路時代的邁進，網路通信、衛星通信、各種電話會議以及某些特殊的通信場合（如水聲通信）中都對通信的保密技術、低截獲率和可靠性提出了更迫切的需要和更高的要求。
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