IP phone transmits the voice data through the grouping network that is the main communication channel for the people in conversation.
IP电话是将语音数据通过分组网络传输的，用分组网络作为会话者的主要通讯信道。
The knowledge grouping work will serve as the main channel of the achievement of library productivity.
将知识组织工作作为图书馆生产力实现的主要途径。
Simulation results show that subcarrier grouping just has a little influence on system performance. Meanwhile the imperfect channel estimation has little effects on the present algorithm.
模拟结果表明引入子载波分组后系统性能依然保持良好，并且信道估计偏差对本算法的影响较小。
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