摘要
结合实测的激光致声信号时频域特性,提出了一种基于频域能量检测器的新型水下脉冲激光声信号检测方法,并分析了不同频率激光声信号的衰减特性。针对远距离条件下高频信号衰减严重的问题,在频域能量检测器的前端添加了预补偿滤波器。蒙特卡罗仿真结果表明,带预补偿滤波器的频域能量检测器可以有效提高远距离下激光声信号的检测性能。
An underwater pulsed-laser-sound-signal detection technique is introduced by combining the frequency domain characteristics of the laser acoustic signal. The different attenuation characteristics of the laser acoustic signal at different frequencies are analyzed. To ameliorate the serious attenuation of high frequency components at long distances, a pre-compensation filter is added to the front end of the frequency-domain energy detector;the results of Monto-Carlo simulation show that the frequency domain energy detector with pre-compensation filter can effectively improve the detection performance of laser acoustic signal at a long distance.
作者
王伟
杨依光
张卫红
李绪锦
徐德刚
Wang Wei;Yang Yiguang;Zhang Weihong;Li Xujin;Xu Degang(Pilot National Laboratory for Marine Science and Technology, Qingdao, Shandong 266200, China;Tianjin University, school of Precision Instruments & Opto-Electronics Engineering, Tianjin 300072, China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2019年第7期45-53,共9页
Chinese Journal of Lasers
关键词
激光声
信号检测
频域能量检测
水声通信
laser-sound
signal detection
energy-detection in frequency-domain
underwater acoustic communication
