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信道群
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  channel group
     Engineering measurement of channel group delay property
     信道群时延特性的工程测量
短句来源
     This paper proposes a multichannel switching network with deflect routing,resolves the channel competition of the output channel group,shows its architecture and principle,decribles the multichannel bandwidth allocation.
     本文提出了一种偏转路由的多信道ATM交换网络,可以解决输出信道群中的信道竞争问题。
短句来源
     Many limiting factors of the hopping speed in the FH high speed hopping DFH system are analyzed. The result shows that the FH channel group retardation is an important factor determing the hopping speed of the FD DFH system, and it decides the highest hopping speed of the DFH system of 5? 000?
     对制约短波高速DFH跳速的众多因素进行了分析 ,结果表明 ,短波信道群时延是确定短波高速跳频系统跳速的重要因素 ,它决定了在一定带宽条件下 ,DFH系统的最高跳速为 5 0 0 0跳 /秒 .
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  “信道群”译为未确定词的双语例句
     This paper derives an approximate expression of the intermodulation distortion for PAL-picture and multiplexed digital sound signals which pass through a band-limited frequency modulation channel. Curves of signal-distortion ratio versus frequency deviation for some typical group delay characteristics are presented.
     本文导出了计算PAL制图象与多路数字伴音信号通过带限调频信道后互调失真的近似公式,并给出了几种典型信道群延时特性下信号互调失直比与频偏的关系曲线,表明了信道群延时特性对性能有着较大的影响。
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  相似匹配句对
     Engineering measurement of channel group delay property
     信道时延特性的工程测量
短句来源
     Group B contains T.
     B由T .
短句来源
     HOMOMORPH-GROUP
     态
短句来源
     Radar channel
     雷达信道
短句来源
     Channel Characteristics;
     信道特性 ;
短句来源
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  channel group
We then present some general principles by which channels can affect cell migration before we discuss each channel group separately.
      
A novel recursive algorithm is developed to determine the minimal number of channels in each channel group that would be necessary to satisfy the QoS requirements.
      
It may be used to excite and channel group or crowd behavior.
      
If two channels from three ones in any channel group disconnect their safety relays, the safety signal is sent.
      
Moreover, we assume that variation of the channel group delay over the band of transmission is negligible.
      
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This paper derives an approximate expression of the intermodulation distortion for PAL-picture and multiplexed digital sound signals which pass through a band-limited frequency modulation channel. Curves of signal-distortion ratio versus frequency deviation for some typical group delay characteristics are presented. Spectral distribution of intermodulation distortion are calculated, and it is found that the reduction of distortion -signal ratio is about l dB when the visual weighting curve is considered.

本文导出了计算PAL制图象与多路数字伴音信号通过带限调频信道后互调失真的近似公式,并给出了几种典型信道群延时特性下信号互调失直比与频偏的关系曲线,表明了信道群延时特性对性能有着较大的影响。本文还给出了互调失真分量的频谱特性,从而求得了对互调失真干扰的视觉加权改善约为1dB。

The group delay specification of a channel is very important for rangingaccuracy of a tracking system and signal quality of a communication channel. Butthis specification usually was not tested because of lack special test equipments. Thisfact impairs error analyzing and giving full play to potentiality of a system. In this paper the idea of using a set of normal test equipment to measure the groupdelay of a channel by means of modulation method has been described. The methodof reducing group delay drift introduced...

The group delay specification of a channel is very important for rangingaccuracy of a tracking system and signal quality of a communication channel. Butthis specification usually was not tested because of lack special test equipments. Thisfact impairs error analyzing and giving full play to potentiality of a system. In this paper the idea of using a set of normal test equipment to measure the groupdelay of a channel by means of modulation method has been described. The methodof reducing group delay drift introduced by the modulator in this test was given. Thereasonableness of the test method and the basises of modulation frequency selectionare discussed. Some phenomena in the test are analyzed.

信道的群时延指标对跟踪系统的测量精度和通信系统的信号质量都十分重要。但该项指标的测试通常因缺乏专用仪器而不能进行,影响了设备误差的分析和系统潜力的发挥。本文介绍利用常用的仪器,采用调制法进行群时延测量的构想,并着重解决了调制器引入的群时延漂移。论述了测量的合理性和调制频率选择的依据,对测量结果进行了分析。

In this paper,the channels time delay for laser atmospheric communication throu-gh turbulence are calculated in a reasonable mode.Some numerical calculations are given.Calcu-lations results show that the time delay of channels through turbulence are no found.The timedelay of channels through turbulence need not he considered in the laser atmospheric communi-cation.

选用数学模型模拟了激光大气通信系统中大气湍流信道的群延迟特性,并进行了数值计算,结果表明:大气湍流信道带来的群延迟失真很小,在激光大气通信中可以不予考虑。

 
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