在很多时候，路径可能很拥挤，可能出现事故、自然灾难或业务冲突，这些都会导致传输延迟。
Many times, the paths can be congested and there may be accidents, natural disaster or business disputes that can cause transmission delays.
在包括3个或更多延迟路径的本发明实施例中，电路515传输多个选择信号给乘法器以选择适当的延迟路径。
In embodiments of the present invention that include 3 or more delay paths, circuit 515 transmits multiple select signals to the multiplexer to select the appropriate delay path.
但是，对于这样高速率的传输，信道会由于具有不同延迟时间的多条干扰路径的存在而呈现出严重的频率选择性。
However, for such high-speed data transmissions, the channel is severely frequency-selective due to the presence of many interfering paths with different time delays.
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