一种低信噪比下的模拟调制信号识别方法  

An Analogue Modulation Recognition Method Under the Lower SNR

作　　者：魏瑾[1] 张立毅[1] 辛建芳[1] 

机构地区：[1]太原理工大学信息与通信工程系,山西太原030024

出　　处：《山西电子技术》2008年第1期24-26,共3页Shanxi Electronic Technology

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.

关 键 词：模拟调制 自动识别 决策理论 低信噪比 

分 类 号：TN911[电子电信—通信与信息系统]