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AM信号确认算法研究

发表时间:2009-09-30  浏览量:1274  下载量:460
全部作者: 秦文,汪芙平,王赞基
作者单位: 清华大学电机工程与应用电子技术系
摘 要: 通过分析短波段振幅调制(amplitude modulation, AM)广播信号调制特性,定义了调制信号上下边带频谱相关系数和调制信号与包络检波信号频谱相关系数的两个新的特征参数。由此,提出一种对AM广播信号进行“身份验证”的信号确认算法。基于短波标准信道的仿真实验表明:所定义的两个参数对噪声和信道滤波鲁棒,该算法可直接应用于实际工程环境,具有重要应用价值。
关 键 词: 信号检测;振幅调制;调制类型确认;短波信道模型
Title: An algorithm for AM signal identification
Author: QIN Wen, WANG Fuping, WANG Zanji
Organization: Department of Electrical Engineering, Tsinghua University
Abstract: An algorithm to uniquely identify amplitude modulation (AM) broadcasting signal was proposed. By analyzing the AM signal’s characteristics, the algorithm defined two parameters: one was the correlation of spectrum of upper and lower bands, and the other was the correlation of signal spectrum and envelope spectrum. The results of simulation based on HF standard channel model showed that the two parameters were robust to noise and channel interference. This algorithm can work effectively under the real circumstance.
Key words: signal detection; amplitude modulation; modulation identification; HF channel model
发表期数: 2009年9月第18期
引用格式: 秦文,汪芙平,王赞基. AM信号确认算法研究[J]. 中国科技论文在线精品论文,2009,2(18):1909-1913.
 
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