Compared with PAM (pole Amplitude Modulation) theory, the minimum symmetric group theory is more effective in implementation of ac machine pole-changing winding's non-regular arrangements.

与PAM(极幅调制)理论相比，最小对称组理论可更有效地实现交流电机变极绕组非正规方案。

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To validate the theoretical analysis, a test system for group velocity delay was set up based on RF modulation.

为了验证理论分析，设计了射频调制法测试介质膜滤波器群速度延时的实验装置。

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Based on the characters of long rang underwater acoustic channels and MFSK modulation, a new Frequency Group Coding (FGC) method is proposed in this paper.

本文针对远程水下信道和MFSK调制的特点，提出了一种新的频率分组编码(FGC)方法。

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