雷达科学与技术2011，Vol.9Issue(4)：335-340,6.
短波环境下跳频信号检测
Detection of Short-Wave Frequency Hopping Signals
齐昶 1王斌 1颜羡卿1
作者信息
- 1. 信息工程大学信息工程学院,河南郑州450002
- 折叠
摘要
Abstract
Short-wave electromagnetic environment is quite complex, including fixed-frequency signals, burst signals, ane etc. In this paper the difficulty in detecting frequency hopping(FH) signal is analyzed. Signals are expressed by short time Fourier transform. Power spectral suppression method is applied to eliminate fixed-frequency signals, burst signals, and etc. Then, 1-D CASO-CFAR is taken into account and is extended to 2-D instance according to the difference between frequency hopping signals and long term signals. Finally, open operation, close operation and median filtering of the morphological image processing are applied to the binary image after 2-D CFAR decision, so the rest noises are eliminated and inanition in signals is smoothed. The simulations show that the long term signals can be eliminated while frequency hopping signals being detected, which provides good precondition for the following processing of frequency hopping signals such as classification and demodulation.关键词
跳频信号/恒虚警概率/信号检测/图像处理Key words
frequency hopping signals/ constant false alarm rate(CFAR)/ signal detection/ image processing分类
信息技术与安全科学引用本文复制引用
齐昶,王斌,颜羡卿..短波环境下跳频信号检测[J].雷达科学与技术,2011,9(4):335-340,6.
