针对常用的多进制数字调制信号,设计了一通用的数字调制识别方案:先用三个时频域特征参数进行调制的大类识别,再利用各自算法估计信号调制阶数,修正了MFSK信号功率谱谱峰个数的估计算法,并提出了MASK/MQAM基于时域的调制阶数识别算法。仿真结果表明,在信噪比大于6dB时,该识别结构和识别算法对MFSK、MPSK、MASK调制信号的正确识别率不低于92%,MQAM识别算法则要求较高的信噪比。 A common digital modulation recognition scheme is designed for the commonly used multi-band digital modulation signals. Firstly, three classes of modulations are identified by using three time-frequency domain parameters, and then their respective signal modulation orders are estimated. The MFSK signals Power spectrum peak number estimation algorithm, and proposed MASK / MQAM modulation algorithm based on the time domain identification algorithm. The simulation results show that the correct recognition rate of MFSK, MPSK and MASK modulation signals is not less than 92% when the signal-to-noise ratio is more than 6dB, while the MQAM recognition algorithm requires higher signal-to-noise ratio.