Power Spectral Densities for Selected Digital Phase-Continuous MFSK (M-ary Frequency Shift Keying) Emissions

摘要

The report is a brief outline and a catalog of 11 power spectral densities for certain M-ary frequency shift keying waveforms. Spectral equations are displayed in graphical form for easy visualization. The spectra pertain to real signals centered on their carrier frequencies. Specific waveform shapes include square (or rectangular) pulses, sine-pulses, raised cosine pulses, and squared raised-cosine pulses. The concluding sections of the report cover two special systems of recent practical interest. They are the M=4 and k=2, alternating frequency, format of Rockwell/Collins and the M=8, k=2, scheme developed by MITRE and Harris Corporations.