摘要
以水声运动目标成像与信号分析为背景,提出了该情况的空间散射模型,并利用此模型对成像声呐接收的回波信号进行了仿真。对仿真信号的分析,说明了该空间散射模型的正确性。以空间散射模型以及仿真回波信号为基础,对球体目标进行了三维成像,并分析了成像的性能。具体的成像过程利用FFT波束形成算法。分析结果说明了水声运动目标体积、距离等因素的影响情况,特别强调了目标运动所造成的影响。这为成像回波信号研究和成像声呐研制提供了理论工具和仿真手段。
A spatial scattering model is proposed for underwater acoustic moving target imaging and signal analyzing, and moving target signals for imaging sonar is also simulated. Analysis shows the validity of the spatial scattering mod- el. Based on the spatial scattering model and simulated signals, the effect of underwater acoustic imaging is analyzed. FFT beam forming method is applied. Result shows that the imaging performance effected by underwater acoustic moving target＇ s size, shape and distance etc, and emphasizes the influence of target moving especially. So the spatial scattering model is both a useful theoretical tool and a simulation method aiding further research and analysis of underwater acoustic moving target imaging.
出处
《电声技术》
2013年第8期57-61,共5页
Audio Engineering
关键词
空间散射模型
水声成像
FFT成像算法
成像声呐
spatial scattering model
underwater acoustic imaging
FFT beam forming method
imaging sonar.
