行星噪聲 的英文怎麼說
中文拼音 [hángxīngzàoshēng]
行星噪聲
英文
planetary noise-
Based on the results of the theory analysis and computer simulation of suspended stripline low pass filter, band pass filter, the transition from waveguide to finline and the transition from waveguide to suspended stripline, the structure design and manufacture were made. the measured results match the requirement. different from the traditional mixers used in the domestic communications satellites, the sub - harmonic balance mixer type was used in the ka - band mixer design
在ka頻段混頻器的研究過程中,通過對衛星和飛船所用到的混頻器進行研究,在對ka波段的傳統射頻前端電路的分析基礎上,提出改變以往星上傳統的基波混頻方案,採取了次諧波混頻方案,降低了本振頻率,簡化了本振鏈路,使噪聲特性、可靠性獲得改善。Moving object detection will need at least three images, because the detection algorithm would easily confuse random bumps in the background noise or image artefacts with faint, moving objects if it would rely on two images only
移動天體檢測需要至少三張圖片,因為如果在兩張圖片中確實有小行星,那麼檢測將很容易被背景噪聲或圖片暗紋搞混亂。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。For the application of direct broadcast satellite ( dbs ), a ku - band high image rejection broadband mixer is designed using ads. it appears predominant performances when compared with common single balanced mixer
針對衛星電視直播接收系統,用ads設計了一個寬頻帶、高鏡像抑制度、低噪聲的ku波段鏡像抑制混頻器,並同普通平衡混頻器進行了對比分析,顯示了其優越的性能。分享友人