Frequencymodulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal.
频率调制：载波的频率依照调校讯号的瞬时值而改变的一种调制。
2
The features of pseudo code PM-carrier FM combined signal include the pseudo code and the modulationfrequency.
伪码调相-载波调频复合信号的识别特征包括伪码特征和频率调制特征。
3
Two kinds of typical wideband signal, FrequencyModulation (FM) signal and Frequency Spread signal, is analyzed qualitatively with wideband Ambiguity Function.