基于空间平滑的多波束测深声呐相干分布源方位估计

发布时间：2018-06-02 18:10

本文选题：多波束测深声呐 + 分布源　；参考：《振动与冲击》2014年04期

【摘要】：在多波束测深声呐的工作环境中,若海底反向散射信号不满足点源假设,方位估计精度将严重下降,而基于分布源模型的方位估计算法可以适应这种环境。目前,大多数分布源算法要求分布源之间不相干,有人提出采用Toeplitz方法估计相干分布源,但该方法精度不高并且忽略了角度扩展参数。为解决多波束测深声呐相干分布源的方位估计问题,提出了基于空间平滑的广义MUSIC方法,公式推导证明了算法的有效性,通过计算机仿真给出算法方位估计的精度以及不同信噪比条件下的性能,最后采用多波束测深系统的实验数据对算法进行了验证。
[Abstract]:In the working environment of multi-beam bathymetric sonar, if the backscatter signal does not satisfy the point source hypothesis, the precision of azimuth estimation will be seriously reduced, and the azimuth estimation algorithm based on distributed source model can adapt to this environment. At present, most distributed source algorithms require incoherence between distributed sources. Toeplitz method is proposed to estimate coherent distributed sources, but the accuracy of this method is not high and the angle extension parameters are ignored. In order to solve the problem of azimuth estimation of coherent distribution source for multi-beam sounding sonar, a generalized MUSIC method based on spatial smoothing is proposed. The formula derivation proves the validity of the algorithm. The accuracy of azimuth estimation and the performance of the algorithm under different SNR are given by computer simulation. Finally, the algorithm is verified by the experimental data of multi-beam bathymetric system.
【作者单位】：哈尔滨工程大学水声工程学院;哈尔滨工程大学水声技术重点实验室;
【基金】：国家863计划资助项目(2007AA09Z124,2008AA092701) 国家科技部国际合作计划资助项目(2008DFR70320) 国家自然科学基金(41006057,41076056,60872107) 中国高等学校博士点基金项目(20102304120028,20112304130003,20122304120012) 水声技术重点实验室基金项目(9140C200105120C20001,9140C200403110C2002)
【分类号】：TN911.7

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