摘要
讨论采用SSB技术传输FM信号的问题,证明了,在单音调制的情况下,经过SSB传输FM信号瞬时频率的变化规律不会改变,但其幅度将随调制信号而变化,调制指数也将减小。因为,在FM信号中幅度的变化是没有意义的,所以理想鉴频器的输出将不会改变,计算机模拟的结果进一步证明了结论的正确性。
Discusses the problem of transimission of Frequency Modulation waves using Single Side Band. Theoretically shows: when single-tone signal modulation is assumed, after SSB transmission, the FM waves will be remain constant in instantaneous frequency, but its amplitude will be changed with the baseband signal and the modulation index will be reduced. This change is meaningless in the case of FM modulation, so that the output of an idealized FM detector will not be affected. Results from computer simulation are presented to illustrate correctness of the theory.
关键词
无线电通信
调频
单边带调制
Radio communication
Frequency modulation
SSB modulation
