| 阵列双稳随机共振在微弱信号检测中的应用研究 |
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| 引用本文： | 莫建文,欧阳缮,肖海林,孙希延.阵列双稳随机共振在微弱信号检测中的应用研究[J].信号处理,2011,27(5). |
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| 作者姓名： | 莫建文 欧阳缮 肖海林 孙希延 |
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| 作者单位： | 1. 西安电子科技大学电子工程学院,陕西,西安,710071
2. 桂林电子科技大学信息与通信学院,广西,桂林,541004 |
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| 基金项目： | 国家973计划，国家自然科学基金，广西科学基金 |
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| 摘 要： | 阵列双稳随机共振(stochastic resonance,SR)系统可利用噪声在单个双稳SR系统基础上进一步增强微弱信号检测的能力,为强噪声背景下微弱信号的检测开创了新方法.本文应用阵列双稳SR原理进行微弱信号检测的研究,采用理论和数值仿真相结合,通过稳态自协方差函数,分析了阵列双稳SR系统输出信噪比(signal-to-noise ratio,SNR)增益.在此基础上,分别讨论了阵列噪声、外部噪声及阵列单元数对检测性能的影响.并与单个双稳SR检测弱信号进行性能比较,分析和仿真结果都表明,在相同条件下,采用阵列双稳SR比采用单个双稳SR检测微弱信号性能有较大改善.这些研究结果对于阵列双稳SR的进一步发展及应用具有重要意义.
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| 关 键 词： | 微弱信号检测 随机共振 阵列双稳随机共振 信噪比增益 |
Study on Application of Array Bistable Stochastic Resonance in Weak Signal Detection |
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| MO Jian-wen,OUYANG Shan,XIAO Hai-lin,SUN Xi-yan.Study on Application of Array Bistable Stochastic Resonance in Weak Signal Detection[J].Signal Processing,2011,27(5). |
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| Authors: | MO Jian-wen OUYANG Shan XIAO Hai-lin SUN Xi-yan |
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| Affiliation: | MO Jian-wen~1 OUYANG Shan~2 XIAO Hai-lin~2 SUN Xi-yan~2 (1.School of Electronic Engineering,Xidian univ.,Xi'an 710071,China,2.Coll.of Information and Communication,Guilin Univ.of Electronic Technology,Guilin 541004,China) |
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| Abstract: | Noise can be used in array bistable stochastic resonance(SR)systems to furtherly enhance the ability of weak signal detection over isolated bistable one.This leads to a new method of weak signal detection from heavy background noise.In this paper, we investigate a method of weak signal detection using array bistable SR theory.By introducing stationary auto-covariance,we study the signal-to-noise ratio(SNR)gain by using both theoretical and numerical arguments.Based on this study,we analyze the effects of ar... |
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| Keywords: | weak signal detection stochastic resonance(SR) array bistable stochastic resonance signal-to-noise ratio(SNR)gain |
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