前视声纳波束形成算法的两点改进

Two Improvements in the Beam-Forming Algorithm of Forward-Looking Sonar Beam

论文首先建立了前视声纳非停走停精确时延模型,在此基础上对现有的前视声纳波束形成算法做了两点改进,引入了非"停-走-停"模型和时延补偿时采用了距离插值。采用数值仿真将新算法与现有的前视声纳波束形成算法进行了比较;首先与"停-走-停"模型的波束形成算法进行了比较,结果表明采用"停-走-停""模型时方位向成像分辨率基本不受影响,但存在距离向位置偏差;然后在非"停-走-停"模型下比较了距离分辨单元整数补偿和精确插值补偿波束形成结果,仿真结果表明带距离插值的波束形成算法能显著改善成像质量。

This paper establishes the forward-looking sonar,non stop-go-stop accurate delay models on the basis of the existing forward-looking sonar do two improved beam-forming algorithm,introduces the non"stop-go-stop"adopted distance interpolation model and time delay compensation.The new algorithm is compared with the existing beam-forming algorithm of forward-looking sonar by numerical simulation.Firstly,it is compared with the beam-forming algorithm of stop-walk-stop model,the results show that the azimuth imaging resolution is basically unaffected by this model,but there is a distance deviation.Then in the"stop-go-stop"model the range resolution cell integer and interpolation beam-forming compensation are compared,the simulation results show that with distance interpolation beam-forming algorithm can significantly improve the image quality.