中国激光, 2019, 46 (7): 0701008, 网络出版: 2019-07-11
基于频域能量检测器的脉冲激光声信号检测 下载: 1145次
Pulsed-Laser-Sound-Signal Detection Based on Frequency-Domain Energy Detector
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
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。
Abstract
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.
王伟, 杨依光, 张卫红, 李绪锦, 徐德刚. 基于频域能量检测器的脉冲激光声信号检测[J]. 中国激光, 2019, 46(7): 0701008. Wei Wang, Yiguang Yang, Weihong Zhang, Xujin Li, Degang Xu. Pulsed-Laser-Sound-Signal Detection Based on Frequency-Domain Energy Detector[J]. Chinese Journal of Lasers, 2019, 46(7): 0701008.