NOISE IMMUNITY OF QAM-16 SIGNALS FORMED ON THE BASIS OF HEXOGANAL GRIDGES
Proposals for studying the noise immunity of receiving sixteen positional quadrature modulation signals synthesized on the basis of hexagonal arrays are presented. The relevance of the search for promising areas for the development of noise-immune radio communication systems in the interests of Ministry of EMERCOM of Russia is considered. The energy parameters of signal structures synthesized by the quadrature keying method are analyzed. Analytical expressions are obtained for estimating their noise immunity from the standpoint of the average power of signal structures, taking into account the representation of the transition from a symbol error to a bit error. Graphic materials are shown. The transition to the hexagonal structure of sixteen positional signals is substantiated, while minimizing the possible increase in the crest factor. Methods for transforming signal constellations QAM-16 are proposed. The prospects for using the developed technical solutions in the interests of further development and improvement of radio communications of the Ministry of EMERCOM are determined.