摘要
信号调制方式的自动识别是未来软件无线电必须具备的功能之一。本文针对模拟调制方式提出了一种基于决策理论的识别流程,分析了模拟调制识别特征参数的提取。该方法具有计算简单、无需知道信号的先验信息的特点,而且能在低信噪比情况下快速有效地进行调制识别,易于实时应用和工程实现。仿真结果表明,在0dB信噪比条件下,正确识别率能够达到85%以上,性能优于传统的调制识别方法。
Automatic recognition for the modulation type of a signal is one of the essential functions for future software radio. An analogue modulation classification flow based on decision theoretic is proposed in this paper. The paper introduces the extraction of characteristic features. This way has a lot of characteristics such as the simple calculating, no demand for prior information. At the same time, it can recognize the signal modulations quickly and efficiently in the lower SNR and can be implemented real-timed and practically. Simulation results indicate： When SNR is 0 dB, the correct recognition rate is already above 85%, the performance of proposed method is much better than the classical modulation methods.
出处
《山西电子技术》
2008年第1期24-26,共3页
Shanxi Electronic Technology
关键词
模拟调制
自动识别
决策理论
低信噪比
analogue modulation
automatic recognition
decision theoretic
lower signal noise ratio
