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文中提出一种基于高阶累积量识别多种数字调制信号的算法。首先推导计算各信号的八阶累积量,从二、八阶累积量中提取一个特征参数,实现以更少参数识别更多信号的目的;然后,为提高MFSK的识别率,从微分后MFSK信号的四、六阶累积量中提取一个特征参数完成识别。仿真结果显示,通过利用这两个参数可以实现2ASK/BPSK、4ASK、8ASK、QPSK、8PSK、2FSK、4FSK、8FSK、16QAM、64QAM等多种数字调制信号的识别。
In this paper, a high-order cumulants based on a variety of digital modulation signal recognition algorithm. Firstly, the eighth-order cumulant of each signal is deduced and a characteristic parameter is extracted from the second and eighth-order cumulants to realize the purpose of identifying more signals with fewer parameters. Then, to improve the recognition rate of MFSK, The fourth and sixth order cumulants to extract a feature parameters to complete the identification. Simulation results show that by using these two parameters can be achieved 2ASK / BPSK, 4ASK, 8ASK, QPSK, 8PSK, 2FSK, 4FSK, 8FSK, 16QAM, 64QAM and other digital modulation signal recognition.