The Analysis of Passive Acoustic Detection Based on Four Array
The plane fours array is proposed to detect target position based on detection principle. The influence would be overcame and the reaction rate of acoustic detection would be raised by using the method. The signal denoising and time-delay estimation are the key problems of passive acoustic detection1. Acoustic signal is denoised by Wavelate in this paper. The threshold value of acoustic signal denoised is identified2 considering the characteristic of the artillery transmitting wave, burst wave acoustic signal and scene noise. The important information of the signal is contained in the wavelet coefficient. Though its peak value is high, the numbers of these coefficients are few. The coefficient is set zero if its absolute value too small and retained or contracted if its absolute value more high during the numerous wavelet coefficients. Estimated Wavelet Coefficients (EWC) is obtained and the signal is reconstructed by using them. This would denoise effectively and the signal-to-noise performance is increased.
acoustic localization time delay estimation Wavelate transform
YI Jinhui LV Yvtao ZHAO Lei LIU Yang
Shenyang Artillery Academy PLA, Shenyang, Liaoning,China,110162
国际会议
第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)
重庆
英文
1223-1226
2009-08-01（万方平台首次上网日期，不代表论文的发表时间）