Non-Data Aided Frequency Synchronization Exploiting ICI in Non-Orthogonal Systems

Existing non data-aided synchronization schemes for OFDM in particular exploit the redundancy implemented by the CP to perform a time and frequency offset estimation. In general this is more challenging to exploit in non-orthogonal multicarrier systems. This paper gives a short insight of the impact of frequency offset of the performance of the non-orthogonal scheme GFDM and proposes a new estimator for it, which makes use of the data repetition implemented by the sidelobes of the prototype filter and is not feasible in OFDM. It allows a coarse CFO estimation in a wide range, even in a tough multipath environment, which can be improved by using a larger number of data.