| 术语 | group delay |
| 释义 | group delay 群延时 1. In communications, a modulated radio frequency signal consists of a group of waves, within an overall wave envelope which may travel at slightly different speeds. The group delay is the time of propagation of the modulated wave envelope transmitted between two points. 在通信技术中,经调制的无线电频率信号由一组波组成,在整个波包络线中这些波的传播 速度可以略有不同。群延时指已调制波包络线在两点之间传输时所需的传播时间。 参阅modulation。 2. The rate of change of total phase shift, with respect to frequency, through a component or system. Group delay variation is the maximum difference in group delay over a band of frequencies. 总相位移经部件或系统后相对频率的变化率。群延时变化是一频带上群延时的最大差值。 |
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