Algorithm of digital demodulation of multi-position phase-shift keying signals with an arbitrary index of modulation oriented to the usage of a digital frequency synthesizer

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Authors: Shahmatov A. V.

Annotation: In the paper we offer the algorithm of digital demodulation of multi-position PSK-signals with an arbitrary index of the modulation, based on phase-digital conversion and division of a phase plane into sectors with the subsequent decoding of number of current sector in informational sequence. The way for the extension of PLL capture bar at the expense of usage of a tentative estimation of a difference frequency in a quadrature signal is considered. The block diagram of algorithm implementation is given in the paper.

Keywords: demodulation of pm signals, phase-shift keying, a phase plane, direct synthesis of the frequency, programmed logical integrated networks