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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The reflection and transmission bandwidth of the high reflectance zone is presented.
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It is proved that the attenuation of an acoustic wave brings about a decrease in the diffraction efficiency and an increase in the transmission bandwidth of the device used.
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It is shown that electronic restructuring of not only the central transmission frequency but also the transmission bandwidth of the filter as well as the form of the transmission curve is possible in collinear acousto-optic filters.
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We show a significant improvement in both the transmission efficiency (up to 97%) and the transmission bandwidth by performing an optimization based on a sensitivity analysis.
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The shortages of storage capacity and transmission bandwidth make efficient compression solutions essential.
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| | The threshold characteristics of the telemetry receiving channels on-board ship are researched,and the importance of the threshold characteristics of the telemetry receiving channels to the performance of TT&C task and the test of equipments is described in this paper.At first,the nature of threshold characteristics is unveiled.The calibrations of the input SNR on threshold of universal significance are proposed,which are the modulation degree calibration and the carrier SNR calibration.The test procedure a... | | 对船载遥测接收信道一项最重要的传输特性———门限特性进行理论分析,并指出门限特性对执行测控任务和设备性能检测的特殊意义。首先阐述门限效应产生的本质即增加传输带宽是在恶化输入信噪比的前提下提高输出信噪比,输入信噪比的域值即为门限。结合各种不同的船载遥测信道门限输入信噪比,提出统一的、具有普遍意义的标定方法:即调制度定标和载波信噪比的标定。根据信道本底噪声的不同,又分为射频有线和无线两种测试方式,给出了详细的测试过程和步骤。最后还分析双模环电路由于实现了载波的动态跟踪而能显著降低门限效应。 | | 文摘来源 | |   |
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