该系统利用大量的子信道使得总的信号速率能够非常接近给定频带的奈奎斯特速率。
The system can make the total signaling rate very close to the Nyquist rate of…
由于受传输带宽的限制，要求信号以较低的速率传输。
Because of the limitation of bandwidth, signal must be transmitted in low speed.
由于受传输带宽的限制，要求信号以较低的速率传输。
Because of the limitation of bandwidth, signal must be transmitted in low speed.
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