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   底噪声 的翻译结果: 查询用时:0.491秒
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底噪声
相关语句
  base noise
     Repeater raises up the GSM base noise,increases system interference,effects the network quality.
     直放站的引入抬高了蜂窝系统底噪声,加大系统干扰,影响网络质量。
短句来源
  “底噪声”译为未确定词的双语例句
     Estimation of Background Noise in Digital Frequency Synthesizer
     数字频率合成器底噪声估算
短句来源
     This paper mainly discusses the causes for the background noises and their effects of the PLL, DDS+PLL, and FN structures in synthesizer, carries out systematic analyses, and presents the calculating methods of background noise.
     对数字频率合成器的PLL结构、DDS+PLL结构和FN结构3种形式的底噪声产生的原因及其影响,进行系统分析,给出底噪声的计算方法。
短句来源
     In this paper,a time-domain generalized wiener filtering method developedby the authors is used to pre-processing the dynamic response signal measured andthe real signal can be detected from the high background noise by as few stimulias possible.
     本文采用了时域广义维纳滤波方法对测取的动态信号进行预处理,以尽可能少的激励次数,从较高的背底噪声中检测出真实信号。
短句来源
  相似匹配句对
     Estimation of Background Noise in Digital Frequency Synthesizer
     数字频率合成器噪声估算
短句来源
     Modal Analysis and Noise Prediction of Sump of I.C.Engine
     内燃机油壳模态分析及噪声预测
短句来源
     A recommended acceptable noise level can be determined from the teacheras response to the noise under investigation.
     噪声调查;
短句来源
     WHITE NOISE
     白噪声
短句来源
     Chondrosarcoma of the skull base
     颅软骨肉瘤
短句来源
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  base noise
After stress application, the bias dependence of the base noise becomes stronger meaning that an additional noise term adds up to the base noise.
      
Base noise of stressed HBT's originated from surface-recombination current introduced upon stress application.
      
Effect of stress on base noise spectral density of low and high-reliability HBT's.
      
For this measurement, the base was grounded to avoid any base noise current being forwarded to the collector.
      
High-reliability HBT's did not show measurable generation-recombination base noise before or after stress application.
      
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When the model of system is fitted according to the dynamic response signalmeasured,there is an important problem:how to increase the estimation accuracyof system parameters in the condidtion of low signal-to-noise ratio.Linearaveraging method can partly increase the signal-noise ratio,but in the general testcondition the system parameters obtained by this method have also unacceptableerror.In this paper,a time-domain generalized wiener filtering method developedby the authors is used to pre-processing the dynamic...

When the model of system is fitted according to the dynamic response signalmeasured,there is an important problem:how to increase the estimation accuracyof system parameters in the condidtion of low signal-to-noise ratio.Linearaveraging method can partly increase the signal-noise ratio,but in the general testcondition the system parameters obtained by this method have also unacceptableerror.In this paper,a time-domain generalized wiener filtering method developedby the authors is used to pre-processing the dynamic response signal measured andthe real signal can be detected from the high background noise by as few stimulias possible.The method of grouping filters suitable to the estimation of noisepower in engineering system measurement is also studied in this paper.The modal measurement and analysis of a cantilever beam are taken as anexample to check the effectiveness of this method.The test shows that during theanalysis of vibration mode the data error due to the low signal-noise ratio at themeasuring point is solved and this is significant for experimental modal analysis.This signal pre-processing program developed for computer-spectrum analyzerhas large practical value.

根据所测动态响应信号拟合系统模型时,一个重要的问题是:在低信噪比的情况下如何提高系统参数的估计精度。采用线性平均方法能适当提高信噪比,但在一般试验条件下,据此所获得的部分系统参数仍具有较大的误差。本文采用了时域广义维纳滤波方法对测取的动态信号进行预处理,以尽可能少的激励次数,从较高的背底噪声中检测出真实信号。文中还说明了适用于工程系统测试中噪声功率估计的滤波器分组方法。以悬臂梁的模态测试及分析为例,检验了该方法的有效性。试验表明,作振型分析时,因测点信号信噪比低而导致数据误差大的问题得以解决,这对实验模态分析是具有重要意义的。所完成的计算机-FFT 谱分析器信号预处理程序有很大的实用价值。

This paper mainly discusses the causes for the background noises and their effects of the PLL, DDS+PLL, and FN structures in synthesizer, carries out systematic analyses, and presents the calculating methods of background noise. Then it puts forward the methods to reduce the background noises and points out the development trend of synthesizer, which is helpful to practice.

对数字频率合成器的PLL结构、DDS+PLL结构和FN结构3种形式的底噪声产生的原因及其影响,进行系统分析,给出底噪声的计算方法。提出了降低底噪声的措施,指出数字频率合成器的发展趋势。

In the mobile communication cell network,base station is used to coverage a large area and repeater is used to coverage small area as supplement.Repeater raises up the GSM base noise,increases system interference,effects the network quality.In some suitable condition,passive relay system can solve the problem of weak signals coverage without effects the network quality.The article demonstrates that passive relay system is feasible in theory and by experiment,educes the idea of using it in the GSM network.basing...

In the mobile communication cell network,base station is used to coverage a large area and repeater is used to coverage small area as supplement.Repeater raises up the GSM base noise,increases system interference,effects the network quality.In some suitable condition,passive relay system can solve the problem of weak signals coverage without effects the network quality.The article demonstrates that passive relay system is feasible in theory and by experiment,educes the idea of using it in the GSM network.basing on the analysis of the application example,the technical request and the application location of passive relay system are given.

移动通信蜂窝组网,以基站覆盖“面”,直放站补充覆盖“点”。直放站的引入抬高了蜂窝系统底噪声,加大系统干扰,影响网络质量。在适当场景下,引入无源中继系统可以达到解决弱信号的目的,同时不影响网络质量。本文对无源中继系统可行性进行理论论证与实验论证,提出无源中继实用化的思路。通过对应用案例多角度重点分析,提出无源中继系统的技术要求、应用场景。

 
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