Modulation identification has found wide applications in modern communication systems. This paper proposes a method to identify the OQPSK modulation type of IS-95 CDMA signal and the GMSK modulation type of GSM signal. The two signals have different transient properties because of their different modulation schemes. The idea of the proposed method is to use wavelet transform to extract the transient behaviors of the two signals, and then perform a template matching in the wavelet transform domain for identification. Simulation results showed that the percentage of correct identification was 98% at -3dB E{sub}b/N{sub}0 with an observation period of 0.5 ins.
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机译：调制识别在现代通信系统中发现了广泛的应用。本文提出了一种识别IS-95 CDMA信号的OQPSK调制类型和GSP调制类型的GSM信号的方法。由于其不同的调制方案，这两个信号具有不同的瞬态属性。所提出的方法的思想是使用小波变换来提取两个信号的瞬态行为，然后在小波变换域中执行模板匹配以进行识别。仿真结果表明，在-3dB e {sub} b / n {sub} 0处的正确识别百分比为98％，观察期为0.5英寸。
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