... synchronizing wheel 同步轮 synchronous carrier system 同步载波系统 synchronous communication 同步通信 ...
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载波同步是正交频分复用系统的一项关键技术。
Carrier frequency synchronization is one of the key techniques of OFDM system.
由于该系统降低了每个子载波上的数据速率，扩频序列更容易同步。
Furthermore, this system lowers the data rate of each carrier branch, so it is easier to make PN sequence synchronized.
OFDM系统存在对数据符号同步和载波频率偏移极为敏感的问题。
The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
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