但是OFDM系统的一个主要缺点就是发送端的传输信号具有较大的峰值平均功率比(PAPR)，这限制了OFDM技术的广泛应用。
One of the major drawbacks of OFDM system is that the OFDM signal of the transmitter can have high peak-to-average power ratio (PAPR), which limits OFDM's wide applications.
考虑实际系统中信号传输通道的数量限制，本文中确定了以下步骤进行被测线路和被控发电机的选择。
Considering the number limit of signal transmit channels, the selection of line which is measured and generator which is controlled goes along following these steps in this paper.
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.
但采集到的数据在传输和存储时仍会受到后端信号处理部分其他器件速度的限制。
But the transmission and storage of the sampled data are limited by the speed of other signal processing devices, which used in the back-end of the system.
他研究出如何通过玻璃纤维使光无限制传输信号，这些信号能够传输到很远的距离。
He learned to get light to go far enough down a glass fiber to pass on signals. The signals can travel great distances.
基于SERDES的串行通信过程中采用时钟和数据恢复技术（CDR）代替同时传输数据和时钟，从而解决了限制数据传输速率的信号时钟偏移问题。
Serial communications based on SERDES adopt the clock_data recovery(CDR) instead of both data and clock transmitting, which solve the problem of clock skew.
单通道光纤旋转连接器具有结构简单、重量轻和耦合损耗小的优点，但传输信号单一，不能双向传输的缺点限制了它的广泛应用。
Single channel fiber optic rotary joint has simple structure, small size and low optical losses, but the unidirectional transmission limits its wide applications.
单通道光纤旋转连接器具有结构简单、重量轻和耦合损耗小的优点，但传输信号单一，不能双向传输的缺点限制了它的广泛应用。
Single channel fiber optic rotary joint has simple structure, small size and low optical losses, but the unidirectional transmission limits its wide applications.
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