Novel automatic modulation classification method employing higher-order cumulants and constellation histogram in the presence of CFO

In this paper, a automatic modulation classification algorithm is proposed for the M-PSK and M-QAM modulated signals under the carrier frequency offset present at the receiver. For this, a novel algorithm using higher-order cumulants and constellation histogram is presented. Performance analysis of the proposed method is done under the different signal to noise ratios. The obtained results using the developed simulation program shows quite accurate modulation classifications when a CFO presents even in the low signal to noise ratio regions.