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通信信号调制识别技术在军事和民用领域都具有重要的应用前景。针对5种经过均方根升余弦脉冲成形的数字相位调制信号,提出了一种实现调制方式自动识别的方法。该方法利用不同调制方式的数字信号做非线性变化后往往具有不同谱线特征的特点,得到了两个新的识别特征参数,为瞬时特征相似的数字相位调制信号的识别提供了新的手段。仿真结果表明,两个新特征参数是非常有效的,在信噪比大于8dB时,该方法的整体识别率不低于95%。
Communication signal modulation recognition technology in the military and civilian areas have an important application prospects. Aiming at the five kinds of digital phase modulation signals after rms cosine shaping, an automatic method to realize modulation is proposed. This method uses the characteristics of different spectral characteristics after nonlinear changes of digital signals with different modulation modes. Two new identification parameters are obtained, which provide a new method for the identification of digital phase modulated signals with similar instantaneous characteristics. The simulation results show that the two new feature parameters are very effective. When the signal-to-noise ratio is more than 8dB, the overall recognition rate of this method is not less than 95%.