Análisis de ganancia de ancho de banda y degradación de la BER en un sistema SEFDM con respecto a OFDM usando MATLAB

Abstract

SEFDM (Spectrally Efficient Frequency Division Multiplexing) is a non-orthogonal multicarrier transmission technique that provides a reduction in spectrum utilization compared to OFDM (Orthogonal Frequency Division Multiplexing). This improvement in spectral efficiency is achieved at the expense of BER (Bit Error Rate) degradation due to the loss of orthogonally of subcarriers. This work aims to compare the SEFDM transmission technique against OFDM, through simulations in MATLAB, in terms of spectrum and the BER degradation. For this, the theoretical concepts related to OFDM and SEFDM are reviewed, which are the basis for implementing MATLAB. Within SEFDM mentions several detectors, of which ID (Iterative Detector) is chosen for implementation and thus minimize BER degradation. The results are show in terms of BER vs Eb/No (Energy per-bit to noise power spectral density ratio) and PSD (Power Spectral Density), which allow analyzing the improvements and inconveniences of this new technique in relation to OFDM.