ANALYSIS OF THE FORM OF MINIMUM-SHIFT FREQUENCY-SHIFT-KEYED COMPLEX SIGNALS TAKING INTO ACCOUNT THE INERTIA OF THE SIGNAL GENERATING AND PROCESSING DEVICES

It is best to use minimum-shift frequency-shift-keyed (MS FSK) complex signals (CS) to improve the utilization efficiency of a dedicated fre quency band in noise-immune data transmission systems [1]. As we know, for the same clock frequency, the main lobe of the spectral power den sity is 1.33 times narrower for such signals compared to phase-shift-k eyed (PSK) complex signals, and contains 99.5% of all the power (92% o f all the power is contained in the main lobe of minimum-shift PSK sig nals), while the first side lobe is -23 dB relative to the main lobe ( -13 dB relative to the main lobe for minimum-shift PSK signals) [2]. T his paper presents an analysis of the form of MS FSK CS's taking into account the inertia of the signal generators and processors, which red uce the maximum and introduce a delay of the voltage across the output of the matched filter.