短語(yǔ)詞組短語(yǔ)group delay spread 群時(shí)延展寬multipath delay spread 多逕時(shí)延展寬RMS delay spread 均方根時(shí)延擴(kuò)展;時(shí)延simulcast delay spread 同播延遲擴(kuò)展RMS time delay spread RMS 時(shí)延擴(kuò)展time -delay spread 時(shí)延散佈time delay spread 時(shí)延散佈 返回 delay spread