多子阵对相干算法在高分辨率多波束测深系统中的应用研究

Research on the multiple subarray-pairs interferometric algorithm used in high resolution multibeam bathymetric system

针对多波束测深系统中的相干算法,基于相位估计误差最小准则,理论推导了最优子阵结构,并针对相干算法中存在的相位模糊,理论推导了相位模糊与子阵结构的关系,最终在此基础上提出了多子阵对相干算法,不仅高效解决了多波束相干测深算法中的相位解模糊难点,而且有效提高了海底地形估计的分辨率和覆盖能力。对水池和湖上实验数据的处理结果表明此方法的有效性、实用性与优越性。

An optimized subarray configuration was analyzed theoretically for the performance enhancement of inter-ferometric algorithm used in multibeam bathymetric system,and the relationship between phase ambiguity existed in in-terferometric algorithm and subarray configuration was deduced theoretically.On the basis,a new multiple subarray-pairs interferometric algorithm was proposed,which not only solved the difficulties of phase ambiguity unwrapping highly ef-ficient,but improved the resolution and coverage performance of bathymetric estimation of system.The processing re-sults of experiment data prove the efficiency,practicality and superiority of the new algorithm.