Frequencywidth is compressed by decreasing signature-code speed and using bit-signal modulates by different carrier so as to decrease multi-user interference.
In FDM (typically used for analog signals) the channel is subdivided into subchannels, each with a different frequencywidth that is assigned to a specific signal.
在分频多任务（用于模拟讯号），信道切割成次信道，每个信道具有不同的频率宽度，指定给特定的讯号。
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The design concept of the relative frequency amplitude ratio and the relative frequencywidth of toque motor stiffness of electro-hydraulic servo valve are proposed.