摘要
水声成像过程中为了分析所接收的运动目标回波、理解接收信号的形成机理,提出了一种用于该情况的空间散射模型,并利用此模型仿真了"T"型阵成像声呐接收的回波信号。对信号的分析说明了空间散射模型的正确性。以空间散射模型为基础,利用傅里叶变换波束形成算法对不同条件下的球体目标进行了水声成像,并分析了成像性能。性能分析说明了水声目标大小、距离等因素对成像的影响情况,还特别强调了在运动情况下目标的成像情况。以上工作完成了对"T"型阵水声成像过程的模拟,为成像过程回波信号研究和成像声呐研制提供了理论基础和仿真手段。
A spatial scattering model is proposed for analyzing the echo reflected by a moving target and comprehending the signal＇s production in underwater acoustic imaging, and the signals of the ＂T＂ pattern imaging sonar are simulated by the spatial scattering model. Analysis shows the validity of the spatial scattering model. Based on the spatial scattering model, sphere target in different conditions are imaged by FFT beam forming method and the performance is analyzed. Results show the effects of underwater acoustic target＇s size, distance, and especially target moving on imaging. Above-mentioned work finishes the simulation of the ＂T＂ pattern array＇s imaging, so the spatial scattering model is supplied as a theoretical tool and a simulation method for signal researching and imaging sonar developing.
出处
《声学技术》
CSCD
2014年第4期304-308,共5页
Technical Acoustics
关键词
空间散射模型
水声成像
FFT成像算法
spatial scattering model
underwater acoustic imaging
FFT beam forming method
