Robust Precoded OSTBC for GFDM Systems

Generalized Frequency Division Multiplexing (GFDM) has been proposed recently as a candidate for the next generation wireless communications systems (5G) due to its attractive properties that seem to cover the envisioned applications. In order to make GFDM more robust to multipath fading effects the techniques of space-time block codes (STBC) can be added to its implementation. In this article, we consider the performance of orthogonal space-time block coded (OSTBC) GFDM systems over Rayleigh fading channel. In addition, to further enhance performance, Discrete Prolate Spheroidal Sequences (DPSSs or multi-tapers) can be exploited to turn conventional GFDM to an improved orthogonal system. In this work we investigated a precoded OSTBC Multitaper GFDM system along with conventional GFDM. The symbol error rate (SER) performance for precoded OSTBC-(M)GFDM systems over a Rayleigh fading channel is examined and a good match between simulation results and analytical expressions is seen to exist.