The method of early detection using a vector-sensor under background noise fluctuation

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (10) : 189-192.

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The method of early detection using a vector-sensor under background noise fluctuation

GUO Hu-sheng，YAN Bing

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Abstract

The ship motion information can be detected by vibration sensor deployed on the bottom of sea. Energy detection used in vibration sensor is the most traditional method，however its performance experiences a significant loss under a dramatic noise fluctuation and low Signal to Noise Ratio. To address this problem，we proposed a sample covariance detection algorithm. According to the characteristic of signals received by vector sensor, the method makes target decision by test statistic of Max-Eigen to Min-Eigen ratio. The proposed method exhibits a good performance and robustness against noise fluctuation without having to know any prior information of the signal. The simulation and experiment results show that the new detection method can improve the detection performance under noise fluctuation，and the total computational complexity will be suitable to vector sensor for early detection.

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information processing / vector-sensor / sample covariance matrix / noise fluctuation

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GUO Hu-sheng;YAN Bing . The method of early detection using a vector-sensor under background noise fluctuation[J]. Journal of Vibration and Shock, 2014, 33(10): 189-192