Spectrally efficient frequency division multiplexing (SEFDM) is a multi-carrier signal
waveform, which achieves higher spectral efficiency, relative to conventional orthogonal …

Examination of a method of increasing the spectral and energy efficiency of the
nonorthogonal multifrequency spectrally efficient frequency division multiplexing (SEFDM) …

A problem of reducing frequency bandwidth in case of multi-frequency signals is considered.
The main conditions are the minimization of additional energy losses while maintaining the …

In this article we present the approach to increase data rate for multifrequency signals. It can
be done by location more frequency subcarriers in same occupied frequency bandwidth …

Предложена методика модификации сигналов SEFDM, где под сигналами SEFDM
понимаются сигналы с управляемой МСИ, полученные из сигналов OFDM путем …

This thesis addresses theoretical and practical challenges of spectrally efficient frequency
division multiplexing (SEFDM) systems in both wireless and optical domains. SEFDM …

Optimal signals with increased duration, providing overcoming “Nyquist Barrier”, are
considered. Optimization task of searching envelopes of signals is presented and …

In this paper, we investigate the performance of massive MIMO systems in a single cell using
independent and identically distributed (iid) Rayleigh channels. This includes studying the …

A possibility of overcoming the “Nyquist barrier” by finding the optimal waveform for a binary
signal is investigated. The same BER performance as of BPSK signals is required. This …

Рассмотрена методика оптимизации спектрально-эффективных неортогональных
сигналов, имеющих максимальную скорость спада уровня энергетического спектра вне …