Abstract
Continuous Phase Modulation Signal has the advantages of continuous phase, faster decay speed of power spectrum, constant envelope and so on, which is widely used in Communication Systems. The phase smoothing degree is one of main factors that affect the decay speed of CPM signal power spectrum. One method of smoothing CPM signal phase based on Atomic function is proposed. The expressions of frequency modulation function and phase modulation function are given as well as the method of CPM signal modulating by orthogonal method. This paper analyses the time-frequency characteristics and realizes the Process of CPM signal orthogonal modulation by MATLAB. The spectrum characteristics of the signal generated has great improvement compared with MSK signal.
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