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.