The Methods of Recognition for Common Used M-ary Digital Modulations

Abstract

A general digital modulation recognition method is proposed for common M-ary digital modulations. A coarse recognition is executed, then different algorithms are used to estimate the order of modulation. The estimation method of the number of spectrum peaks is modified and a novel recognition algorithm of modulation order of MASK and MQAM is presented. Simulations results show that the recognition rate of this recognition structure and algorithm can reach 92% for MFSK, MPSK and MASK when the SNR is above 6 dB, and for MQAM, a higher SNR is required.