group delay spread

例句：

1. 1. Thegroup delay spread is a critical factor indetermining the performance of wireless systems.
   群延迟扩展是决定无线系统性能的关键因素。
2. 2. Inthis study, we investigated the effect ofgroup delay spread on signal propagation.
   在这项研究中，我们研究了群延迟扩展对信号传播的影响。
3. 3. The group delayspread can be measured using various techniques,including time-domain and frequency-domainanalysis.
   可以通过各种技术测量群延迟扩展，包括时域分析和频域分析。