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

In this paper, an experimental testbed is designed to evaluate the performance of a
bandwidth compressed multicarrier technique, termed spectrally efficient frequency division …

Zero head discrete Fourier transform (DFT) spread spectral efficient frequency division
multiplexing (ZH-DFT-s-SEFDM) as a non-orthogonal multicarrier transmission scheme is …

Optimal signals with smoothed envelopes and increased duration are considered.
Smoothed envelopes were obtained by optimization task with restriction on the energy of …

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 …

The approach to the selection of the amplitude limitation mode for decreasing the peak-to-
average power ratio (PAPR) of the Faster-Than-Nyquist (FTN) signals is presented. This …

An opportunity of finite-length optimal signals application to excess Nyquist limit without
energy losses and within defined occupied bandwidth is considered in this article. Finite …

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

Application of optimal signals allows to solve the problem of improving spectral efficiency
with minimal energy losses. However, the major disadvantage of such signals is high peak …

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