Analysis of Amplitude Limiter Application for Suppressing Spurious Signals

The paper is dedicated to the analysis of influence of amplitude limiting on main signal which contains spurious signals. A mathematical analysis of the limiting process was done. The analysis was divided into two approaches. First is based on operations on the signal waveform in the time domain. The second relies on the approximation of an ideal limiter characteristic by the 15-th degree polynomial and excitation by superposed sine signals. The obtained results show a possibility of improving the main signal to spurious signal power ratio up to 6 dB.