摘要
在深海目标探测中,蓝绿激光雷达发出的激光受到水体的后向散射,回波信号对比度下降严重,无法满足水下目标探测应用的要求。载波调制激光雷达水下目标探测技术能够有效抑制海水后向散射,提高目标对比度。利用计算机仿真载波调制激光雷达水下目标探测系统,通过仿真系统模拟回波信号,然后对比回波信号中激光信号和微波信号的目标对比度,并分析系统内外部参数对回波信号的影响。仿真结果说明:在深海目标探测中,载波调制激光雷达技术对探测效果有明显改善,海水参数和调制参数对探测性能有较大影响。
In the deep-ocean target detection,under-water target contrast is limited by incoherent backscatter clutter,and unable to meet the requirements of application of under-water target detection effectively.Modulated lidar on optical carrier technology which detects the target in deep-ocean can effectively inhibit the backscattering of seawater scatter clutter and improve target contrast of the echo signal.The computer was used to simulate the system of modulated lidar on optical carrier for target detection in deep-ocean,and the simulated system was used to emulate the echo signal.Then,the target contrast of its lidar signal was compared with radar signal and the impact of internal and external parameters of this system on echo signal were analyzed.The results show that the detection effects are significantly improved by using modulated lidar on optical carrier technology,and seawater parameters and modulation parameters have significant impact on the detection performance in the deep-ocean target detection.
出处
《红外与激光工程》
EI
CSCD
北大核心
2011年第12期2408-2412,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(60572079)
关键词
载波调制激光雷达
后向散射
目标对比度
modulated lidar on optical carrier
backscattering clutter
target contrast
