rolloff meaning in Chinese

高低频规律性衰减，滚降

Provides a 6db - per - octave rolloff filter at 115hz
提供一个115赫兹时每八度6分贝的低频上移滤波器。
Because msk phase is continuous , the rolloff velocity of the msk spectrum to the psk was improved greatly . on the other hand , if the channel ' s bandwidth is presented , the data transmission rate of msk is better than that of bpsk . 2
由于msk相位连续，它相对于psk频谱的滚降速度有了很大的改善；另外在给定信道频带的时候，它比bpsk传输的数据速率高，每秒能传输更多的比特。