Error estimation of discrete formation method for optimal FTN signals

Abstract

Abstract One of the branches of Faster than Nyquist (FTN) signaling providing transmission at the rate higher than “Nyquist limit” with insignificant energy losses includes optimal FTN pulses. These pulses have controllable level of intersymbol interference (ISI) and given time and spectral parameters. The efficiency of practical usage of these pulses depends on the errors of discrete formation method. In this work a guidance for estimating the minimum number of samples needed to meet the requirements for spectral and energy characteristics of optimal FTN signals is proposed. Simulation modeling and experiments with the help of vector signal generator have been held. It was found that to form optimal FTN pulse with duration Ts=2T not more than 16 samples are needed. In this case, energy losses relatively to continuous optimal FTN pulse are about 0.2 dB.