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Noise can be used by the nonlinear stochastic resonance system to enhance the ability of weak signal detection, which creates a new method of weak signal detection under heavy background noise. A hardware circuit system, designed based on the basic principle of stochastic resonance, is used to detect single-frequency and multi-frequency weak signals. When the signal with noise that simulates actual engineering situation is introduced into the system, the spectrum of samples of the output signal shows that single-frequency and multi-frequency weak signals under heavy background noise can be detected by the technology based on stochastic resonance effectively. The application field of weak signal detection technology based on stochastic resonance is entended by the effective detection of mutil-frequency weak signal, and the degradation of signal recognition by low-frequency noise is eliminated by digital filtering effectively. The weak signal detection technology based on stochastic resonance has potential applications in the information recognition and information processing.
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Keywords:
- stochastic resonance /
- hardware circuit system /
- detection of weak signal /
- digital filtering
[1] ［1］Benzi R, Stuera A, Vulpiani A 1981 J. Phys. A 14 L453
[2] ［2］Nicolis C, Nicolis G 1981 Tellus 33 225
[3] ［3］Gitterman M 2005 Physica A 352 309
[4] ［4］Ning L J, Xu W 2007 Physica A 382 415
[5] ［5］Jin Y F, Xu W, Xu M and Fang T 2005 J. Phys. A 38 3733
[6] ［6］Ning L J, Xu W 2009 Acta Phys. Sin. 58 2889(in Chinese)［宁丽娟、徐伟 2009 58 2889］
[7] ［7］Jin Y F, Hu Y F 2009 Acta Phys. Sin. 58 2895(in Chinese)［靳艳飞、胡海岩 2009 58 2895］
[8] ［8］Guo L M, Xu W, Ruan C L, Zhao Y 2008 Acta Phys. Sin. 57 7482(in Chinese)［郭立敏、徐伟、阮春蕾、赵燕2008 57 7482］
[9] ［9］Zhang L Y, Jin G X, Cao Li 2008 Acta Phys. Sin. 57 4706(in Chinese)［张良英、金国祥、曹力 2008 57 4706］
[10] ］Ning L J, Xu W 2007 Acta Phys. Sin. 56 1944(in Chinese)［宁丽娟、徐伟 2007 56 1944］
[11] ］Hu G 1994 Stochastic Forces and Nonliear Systems (Shanghai: Shanghai Scientific and Technological Education Publishing House)(in Chinese)［胡岗 1994 随机力与非线性系统（上海：上海科技教育出版社）］
[12] ］Hu G, Qin D R, Gong D C, Wen X D 1991 Phys. Rev. A 44 6414
[13] ］Hu G, Nicolis G, Nicolis C 1990 Phys. Rev. A 42 2030
[14] ］Zhou T, Moss F 1990 Phys. Rev. A 41 4264
[15] ］Zhang Y, Lv H F, Zhao Y, Sun X D 2007 Journal of Jilin University (Information Science Edition) 25 71(in Chinese)［张宇、吕海峰、赵远、孙秀冬 2007 吉林大学学报(信息科学版)25 71］
[16] ］Leng Y G 2003 Acta Phys. Sin. 52 2432(in Chinese) ［冷永刚 2003 52 2432］
[17] ］Ingle V K, Proakis J G (Translated by Chen H C) 1998 Digital Signal Processing Using Matlab (Beijing: Electronics Industry Press) p276—305(in Chinese)［ V.K. 英格尔、J.G.普罗克斯 著 陈怀琛等译 1998 数字信号处理及其MATALB实现（北京：电子工业出版社）第276—305页］
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[1] ［1］Benzi R, Stuera A, Vulpiani A 1981 J. Phys. A 14 L453
[2] ［2］Nicolis C, Nicolis G 1981 Tellus 33 225
[3] ［3］Gitterman M 2005 Physica A 352 309
[4] ［4］Ning L J, Xu W 2007 Physica A 382 415
[5] ［5］Jin Y F, Xu W, Xu M and Fang T 2005 J. Phys. A 38 3733
[6] ［6］Ning L J, Xu W 2009 Acta Phys. Sin. 58 2889(in Chinese)［宁丽娟、徐伟 2009 58 2889］
[7] ［7］Jin Y F, Hu Y F 2009 Acta Phys. Sin. 58 2895(in Chinese)［靳艳飞、胡海岩 2009 58 2895］
[8] ［8］Guo L M, Xu W, Ruan C L, Zhao Y 2008 Acta Phys. Sin. 57 7482(in Chinese)［郭立敏、徐伟、阮春蕾、赵燕2008 57 7482］
[9] ［9］Zhang L Y, Jin G X, Cao Li 2008 Acta Phys. Sin. 57 4706(in Chinese)［张良英、金国祥、曹力 2008 57 4706］
[10] ］Ning L J, Xu W 2007 Acta Phys. Sin. 56 1944(in Chinese)［宁丽娟、徐伟 2007 56 1944］
[11] ］Hu G 1994 Stochastic Forces and Nonliear Systems (Shanghai: Shanghai Scientific and Technological Education Publishing House)(in Chinese)［胡岗 1994 随机力与非线性系统（上海：上海科技教育出版社）］
[12] ］Hu G, Qin D R, Gong D C, Wen X D 1991 Phys. Rev. A 44 6414
[13] ］Hu G, Nicolis G, Nicolis C 1990 Phys. Rev. A 42 2030
[14] ］Zhou T, Moss F 1990 Phys. Rev. A 41 4264
[15] ］Zhang Y, Lv H F, Zhao Y, Sun X D 2007 Journal of Jilin University (Information Science Edition) 25 71(in Chinese)［张宇、吕海峰、赵远、孙秀冬 2007 吉林大学学报(信息科学版)25 71］
[16] ］Leng Y G 2003 Acta Phys. Sin. 52 2432(in Chinese) ［冷永刚 2003 52 2432］
[17] ］Ingle V K, Proakis J G (Translated by Chen H C) 1998 Digital Signal Processing Using Matlab (Beijing: Electronics Industry Press) p276—305(in Chinese)［ V.K. 英格尔、J.G.普罗克斯 著 陈怀琛等译 1998 数字信号处理及其MATALB实现（北京：电子工业出版社）第276—305页］
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