短語詞組短語spread spectrum radio communication 無線擴(kuò)頻通信spread spectrum radio communications system 無線擴(kuò)頻通信系統(tǒng)spread spectrum packet radio network 擴(kuò)頻分組無線數(shù)據(jù)網(wǎng)radio spread spectrum 無線擴(kuò)頻radio spread spectrum communication 無線擴(kuò)頻通信 返回 spread spectrum radio