| 戴忠华,周穗华,孙玉绘,单 珊.舰船地震波信号的滑动功率谱实时检测算法[J].电子测量与仪器学报,2020,34(1):74-80 |
| 舰船地震波信号的滑动功率谱实时检测算法 |
| Real time detection algorithm of sliding power spectrum of ship seismic wave signal |
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| DOI： |
| 中文关键词: 舰船地震波 自适应线谱增强 滑动功率谱 检测特征量 检测阈值 |
| 英文关键词:ship seismic wave, adaptive line spectrum enhancement, sliding power spectrum, detection feature quantity, detection threshold. |
| 基金项目:国家自然科学基金（51509252）资助项目 |
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| 中文摘要: |
| 为提高低信噪比环境下的地震波信号检测概率，结合自适应线谱增强技术，基于滑动功率谱提出一种新的舰船地震波信号实时检测算法。首先利用自适应线谱增强技术对信号进行处理，然后对处理后的信号进行功率谱估计，选取一段频带内的平均功率作为检测特征量，并设计相应的自适应检测阈值算子，最后根据一定的检测规则完成对舰船地震波信号的实时检测。实测数据和仿真数据表明，该检测算法能够有效完成低信噪比的目标检测，在信噪比为-15 dB时，检测概率达到93%。 |
| 英文摘要: |
| In order to improve the detection probability of seismic wave signals in low SNR environment, combining with adaptive line spectrum enhancement technology, this paper proposes a new real time detection algorithm for ship seismic wave signals based on sliding power spectrum. Firstly, the signal is processed by adaptive line spectrum enhancement technology, then the power spectrum estimation is performed on the processed signal, the average power in a frequency band is selected as the detection feature quantity, and the corresponding adaptive detection threshold operator is designed. Finally, real time detection of ship seismic wave signals is completed according to certain detection rules. The measured data show that the detection algorithm can effectively accomplish target detection with low signal to noise ratio, and the detection probability reaches 93% when the signal to noise ratio is -15 dB. |
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