With the introduction of domestic freshwater liner shipping, the shipping channel status of Yangtzi's mainline is showed.
在介绍国内内河班轮运输状况的同时，对长江干线航道状况分段进行分析介绍。
Beginning with brief introduction for the basic principle of OFDM, this paper establishes the system simulation model and thereafter analyzes the synchronization and channel estimation.
文章首先简要介绍了OFDM的基本原理，建立了系统仿真模型，对系统的同步和信道估计进行了分析。
Because of the introduction of additional poles to the system by acoustic feedback channel, there exists the possibility of unstability of ANC system.
由于声反馈通道向ANC系统引入了新的极点，导致系统有失稳的可能性。
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