基于随机共振的微弱信号检测
Weak Signal Detection Based on Stochastic Resonance
-
摘要: 在强噪声背景下，基于WV和Hough变换的正弦和线性调频信号检测方法的性能严重下降，为克服这种不足，该文在深入分析FHN随机共振系统参数对滤波能力影响的基础上，提出一种基于随机共振系统检测微弱正弦和线性调频信号的方法。首先借助FHN随机共振模型进行滤波，在此基础上进行WV和Hough变换，将信号的检测问题转换为时频图中的直线检测问题。实验证实，该方法具有较好的效果。Abstract: In a heavy noise,the method based on Wigner Ville (WV) and Hough transformations has the poor performance of detecting the weak signal. To improve it, this paper analyzes the influence of the Fitz Hugh Nagumo(FHN) models parameters on its filtering characteristics, and presents a method of detecting weak sinusoid and LFM signals based on FHN model of stochastic resonance. Firstly ,the received signal is filtered by FHN model ,and transformed by WV and Hough in turns, thus whether a signal is present in noise is determined according to whether there is a line in time-frequency picture. Finally, the validity of this method is well verified by the experiments.
-
葛凤翔，蔡平，惠俊英，等. 混响背景中目标回波检测和参数估计的一种新方法. 电子学报，2001，29(3)：304.306.[2]胡昌华，周涛，夏启兵，等. 基于MATLAB系统分析与设计时频分析。西安：西安电子科技大学出版社，2002：48.51.[3]Collins J J, Chow C, Capela A C，et al.. Aperiodic stochastic resonance .Physical Review E, 1996, 53(4): 5575.5583.[4]Collins J J, Chow C, Imhoff T T. Aperiodic stochastic resonance in excitable systems[J].Physical Review E.1995, 52(4):3321-[5]Henegham C, Chow C C, Collins J J, et al..Information measures quantifying aperiodic stochastic resonance[J].Physical Review E.1996, 54(3):2228-[6]杨定新，胡茑庆. 随机共振在微弱信号检测中的数值仿真. 国防科技大学学报，2003，25(6)：91.94.[7]杨祥龙，江波，吴为麟，等. 小信号检测中的自适应随机共振技术. 信号处理，2003，19(2)：182.184.[8]杨祥龙， 汪乐宇. 一种强噪声背景下弱信号检测的非线性方法[J].电子与信息学报.2002,24(6):811-浏览[9]冷勇刚，王大勇. 二次采样用于随机共振从强噪声中提取弱信号的数值研究. 物理学报，2003，52(10)：2432.2437.[10]段江海，宋爱国，王一清. 随机共振理论在微弱信号检测中的应用研究. 信号处理，2003，19(6)：569.572.[11]段江海，宋爱国，王一清. 采用主分量分析方法研究随机共振.信号处理，2004，20(2)：213.216.[12]Ye Qinghua.[J].Huang Haining, He Xinyi, et al.. Improved bearing estimates of weak signals using stochastic resonance and frequency shift techniques, OCEANS 2003. San Diego, Calif. Sept. 25th.2003,:- -
计量
- 文章访问数: 3212
- HTML全文浏览量: 126
- PDF下载量: 2582
- 被引次数: 0
下载:
