Spectral efficiency of signals of multichannel communication systems with orthogonal modulation

The errors of restoration original continuous signals in digital communication systems with orthogonal modulation equidistant subcarriers (the so-called OFDM technology) are considered. theory radio circuits and is applied as a scientific technical basis the problem. spectra discrete were analysed, influence violations conditions Kotelnikov’s theorem asymptotics recovery investigated. Methods for analysing composite arbitrary selection sampling frequency spaced have been developed, quantitative estimates quality signal on receiving side obtained using method summing Fourier integrals according to Feuer. It shown that when amount shift basic series decomposition functions width spectrum main lobes output matched, it possible count minimal mutual interference intersymbol signal. In addition, was established correct Feuer kernel discretisation allows increasing accuracy overall efficiency wireless system due reduction Gibbs pulsations energy. Spectral signals, which used systems, depends great degree from choice smoothing kernel. Also, dynamic change number members networks, collisions, ripples, level intersystem reduced. Comparative analysis other factors, such Lanzosh factor, two-parameter etc. decomposing quasi-orthogonal shows restoring depend various influencing factors. also there couldn’t be universal recipe choosing multiplier (or kernel). This problem requires additional research an analytical computational nature.