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。
2
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。
3
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.