计算仿真结果表明，与已有的策略相比，该文提出的策略能够获得较低的传播延时和较小的切换频率，具有很好的实用价值。

Compared with other previous strategies, the simulation results show that MHH strategy performs better with less propagation delay and lower handover frequency, so it has a good practical value.

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信道估计是CD MA系统中的关键技术，涉及到对用户信号传播信道的幅度、相位和延时的估计。

The parameter estimation of the signal propagating channel in CDMA systems is a key technology, which involves estimation of amplitude and delay of signal propagating channels.

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从面对面传播、延时传播到电子对话，道德话语载体的历史形态不断变化。

From the face-to-face communication, delay spread to the electronic dialogue, moral discourse vector changes as history goes by.

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