宽带噪声中未知频率窄带信号的提取  

Extraction of Uncertain Frequency Narrow Band Signal in Wide Band Noise

作　　者：黄斌[1] 范录宏[1] 周正欧[1] 

机构地区：[1]电子科技大学电子技术系

出　　处：《电子科技大学学报》1995年第S2期188-191,共4页Journal of University of Electronic Science and Technology of China

基　　金：电子部预研基金

摘　　要：提出一种从宽带噪声中提取未知频率窄带信号的方案，该方案采用单滤波器与数字式频率扫描锁定系统相结合。经混频后，与低速模拟─数字转换器，与ＦＦＴ配合，可对高频信号实现细化的谱分析。应用此系统可提取０～２６ＭＨｚ内任一未知单频信号，并且改善信噪比约１８ｄＢ。文中还给出了系统框图和实际测试结果。A new scheme of extracting uncertain frequency narrow band signal in wide band noiise isdescribed in this paper. The scheme used the method in which the single filter and the digital frequency scan-locding system are combined. After mixing frequency,it made spectrum analyses of high frequency signalfine with low speed A/ D converter and FFr. Whichever uncertain frequecy radar signal whithin0～26 MHz is extracted,S/N ratio improves 18 dB. The system block diagrams and experiment results are given inthis paper.

关 键 词：宽带噪声 信号检测 频率未知 频率合成 

分 类 号：TN911.7[电子电信—通信与信息系统]