摘要
对粗糙海底波导中信号的时间反转时空聚焦进行仿真研究。利用数值计算分析不同海底粗糙度RMS(平均起伏高度)下的聚焦效果,并与平整海底时作比较。研究结果表明:在本研究计算参数范围内,粗糙海底的RMS越大散射强度越大,信号在声源处的时间反转时空聚焦效果比平整海底时稍有减弱,但随着RMS增大无明显减弱。因此,时间反转技术适用于粗糙海底波导中的目标探测。
The spatio-temporal focusing of signals propagating in a rough bottom waveguide with time re- versal technique was simulated. The focusing capability for a bottom with different RMS （root mean square of roughness height） was also analyzed by numerical calculation, and was compared with the capa- bility for a smooth bottom.＇ The result show that within the parameters calculated in this paper, the larger the RMS of the rough bottom becomes, the greater the scattering intensity is. The sPatio-temporal focu- sing capability at the source is a little decreased compared with the smooth bottom, but do not decrease significantly with the RMS increasing. Therefore, the time reversal technique can be applied to targets de- tection in a waveguide with rough bottom.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第7期178-182,共5页
Periodical of Ocean University of China
基金
声纳技术国防科技重点实验室开放基金项目(KF201005)
国家自然科学基金项目(46976019)资助
关键词
粗糙海底
散射场
时间反转
时空聚焦
rough bottom
scattering field
time reversal
spatio-temporal focusing
