Modulation classification of higher order MQAM signals using mixed-order moments and Fisher criterion

Automatic modulation classification (AMC) is widely used in both civilian and military applications. This paper presents a new method for the automatic classification of higher order QAM signals via Rayleigh fading channel, using a modified Joint Power Estimation and Modulation Classification (JPEMC) algorithm and Fisher criterion. The proposed algorithm has low computational complexity. The advantages of our new algorithm are we don´t need the channel information as a prior and the estimation value of SNR. The proposed approach was evaluated in Monte Carlo simulations. The experimental results show that the percentage of identification can reach 98% when SNR is more than 5 dB.