Frequency Synchronization for Index Modulation aided OFDM Systems

As next generation wireless is transforming into greener communication, OFDM with index modulation (OFDM-IM) stands out as a promising technology offering both spectral and the energy efficiency. However, the success of this technology is dependent on the accurate estimation and compensation of the carrier frequency error. In this work we have proposed a novel frequency synchronization algorithm utilizing the modified cyclic prefix (CP) at the receiver end. The algorithm works in 2 phases estimating the coarse and fine error. The matlab simulation results showed that the mean square error (MSE) for the coarse estimation is
$\boldsymbol{10^{-5}}$
and the fine estimate MSE is
$\boldsymbol{10^{-7}}$
,