A Recognition Algorithm for M-QAM Based on Amplitude Distribution
An automatic recognition algorithm for M-QAM based on the amplitude distribution is proposed. This algorithm uses the normalized amplitude distribution to achieve automatic recognition for M-QAM signals, and enhances the correct recognition rate through the nonlinear amplification. Compared with the recognition algorithm based on amplitude moment, this algorithm does not need those prior conditions, such as carrier frequency offset, code element rate, amplitude factor and so on. The simulation confirmed that, when SNR≥16dB the correct recognition rate of this algorithm is greater than 90%.
L. Y. Tan et al., "A Recognition Algorithm for M-QAM Based on Amplitude Distribution", Applied Mechanics and Materials, Vols. 128-129, pp. 20-24, 2012